Science Quizzes

Name that Thing - Nature, composite image: carnation, dewclaw, fjords, lynx

Name That Thing: Nature

Get acquainted with the great outdoors

New Quizzes

Adhesive yellow note papers with "DON'T FORGET!" message hanging on ropes with clothes pins. (memory, adhesive notes, sticky notes, reminders)

Can You Remember These Mnemonics? Quiz

Fourteen (hopefully) unforgettable terms.

Baobab trees, (genus Adansonia) in Madagascar. Baobab trees are categorized under nine species of deciduous trees of the hibiscus, or mallow, family (Malvaceae).

Name that Tree! Quiz

A quiz that’s all bark, no bite.

Frilled lizard (Chlamydosaurus kingii), Australia (reptile). Membrane around neck is raised when animal is threatened or surprised. (animal behavoir, behavioral response)

Name That Animal! Quiz Vol. 3

Who’s who of the zoo crew?

Life-size model of prehistoric Dilophosaurus dinosaur in Dino Park in Novi Sad, Serbia. Taken April 28th, 2016 in Novi Sad, Serbia.

Name That Dinosaur! Quiz

You don’t need to be a paleontologist to dig this quiz.

All Science Quizzes

Adhesive yellow note papers with "DON'T FORGET!" message hanging on ropes with clothes pins. (memory, adhesive notes, sticky notes, reminders)

Can You Remember These Mnemonics? Quiz

Fourteen (hopefully) unforgettable terms.

Baobab trees, (genus Adansonia) in Madagascar. Baobab trees are categorized under nine species of deciduous trees of the hibiscus, or mallow, family (Malvaceae).

Name that Tree! Quiz

A quiz that’s all bark, no bite.

Frilled lizard (Chlamydosaurus kingii), Australia (reptile). Membrane around neck is raised when animal is threatened or surprised. (animal behavoir, behavioral response)

Name That Animal! Quiz Vol. 3

Who’s who of the zoo crew?

Life-size model of prehistoric Dilophosaurus dinosaur in Dino Park in Novi Sad, Serbia. Taken April 28th, 2016 in Novi Sad, Serbia.

Name That Dinosaur! Quiz

You don’t need to be a paleontologist to dig this quiz.

Red and yellow cherry tomatoes, some forming a question mark, against a light blue background. (organic, fruits, vegetables)

Fruit or Vegetable? A Quiz

How to be a smarty-pants in the produce aisle.

Close up of scorpion tail (Scorpion scorpion) from asset scorpo008: Scorpion scorpion (poisonous; stinger; arachnid)

Guess the Animal Tail! Quiz

Get to the bottom of these animal backsides.

Dachshund dog with a smooth coat. Breed of dog developed in Germany to hunt badgers.

Name That Dog!

Can you tell the difference between a Chihuahua and a Chow Chow?

Umbrella colored like a rainbow sticking out above a sea of black umbrellas while it rains. (storm, weather)

Weather Words Vocabulary Quiz

Can you handle the (barometric) pressure?

The cheetah is the fastest land animal over short distances. It has become an endangered species in Africa, and is almost extinct in Asia. Cheetah mother with young. Cheetah cubs

Moms of the Animal Kingdom Quiz

The mother of all animal quizzes.

Periodic Table of the elements concept image (chemistry)

Facts You Should Know: The Periodic Table Quiz

This quiz is a gas…and a liquid and a solid.

Lightning over a farm field. Weather electricity thunderstorm light energy tree

Facts You Should Know: Weather Quiz

The forecast calls for 15 questions. Prove your meteorological...

Close up of the eye of a horned owl. (genus Bubo) bird raptor. Cropped version of Asset ID:

Guess the Animal Eyes Quiz

Can you tell these creatures just by looking at their peepers?

Name that Thing - Tools, composite image: calipers, hammer claw, pestle, trowel

Name That Thing: Tools

A handy quiz to test your tool acumen.

Name that Thing - Nature, composite image: carnation, dewclaw, fjords, lynx

Name That Thing: Nature

Get acquainted with the great outdoors

Name that Thing - Science, composite: circuitboard, gnomon, eye iris, airplan yaw

Name That Thing: Science

Do you know the difference between a protractor and a compass?

Various retriever dog breeds sitting in a row. L-R: curly coated retriever, golden retriever, Labrador retriever, duck tolling retriever, flat coated retriever. hunting sporting dogs

The Dog Breed Quiz

Find out which breed can outrun a cheetah, which breed was created...

Dromedary camels (Camelus dromedarius). Animals, mammals.

Ultimate Animals Quiz

What is a rattlesnake’s rattle made of? What animals can go over...

Sunflowers growing in a field

Name That Flower!

Can you tell the difference between a lilac and a hyacinth?

A capybara (Hydrochoerus hydrochaeris), Pantanal, Brazil. (rodents, carpincho, water hog)

Name That Animal!

Can you tell a tapir from an aardvark?

Human eyelashes under magnifcation. Colored scanning electron micrograph (SEM) of human eyelash mites

Name That Magnified Object!

Can you figure out what these common items are when they're extremely...

pigeon. pigeon and dove. member of the order Columbiformes, family Columbidae

Ultimate Bird Trivia Quiz

See if you will soar with the eagles or go the way of the dodo.

Axolotl salamander. Amphibian

Name That Animal! Volume 2

Can you tell a meerkat from a wombat?

Lion (panthera leo)

Deadliest Animals Quiz

Do you know which species of shark is most likely to attack a...

Cube, one of the five Platonic solids. A cube is a polyhedron with six faces, all of which are squares.

What’s a Platonic Solid?

A Platonic solid is a geometric solid with faces that are identical...

Truncated icosahedron, one of the Archimedean solids. A truncated icosahedron has 32 faces: 12 pentagons and 20 hexagons. Soccer balls are traditionally truncated icosahedrons.

Know Your Archimedean Solids Quiz

There are 13 Archimedean solids, which have two or more types...

Western European hedgehog (Erinaceus europaeus) foraging in the leaves on the forest floor. Mammal animal insectivore

Can You Identify These Mammals? A Photo Quiz

Do you know a hedgehog from an aardvark? Prove it with this quiz!...

Red kangaroo (Macropus rufus) in the outback of Queensland, Australia. Marsupial

Know Your Marsupials Quiz

There are more than 250 species classified as marsupials. This...

Iceland, Glacier lagoon (Jokulsarlon)

Winter Weather Words Quiz

Winter is a time of extreme weather and unusual words to describe...

Close-up of megalodon shark (Carcharocles megalodon); the biggest shark teeth on a black background. (fossil shark, extinct species)

Understanding Megalodon

Megalodon was the largest shark, and likely the largest fish,...

Lake Mead is seen in the distance behind a dead creosote bush in an area of dry, cracked earth that used to be underwater near where the Lake Mead Marina was once located on June 12, 2021 in the Lake Mead National Recreation Area, Nevada.

Comprehension Quiz: Water Scarcity

Think you know what's going on when there isn't enough water...

Horologist Roman Piekarski starts the time consuming task of adjusting the 600 antique clocks at Cuckooland Museum in readiness for this weekends change to British summer time on March 23, 2009 in Knutsford, England.

Ologies Quiz

If you really liked quizzes and wanted to study them, you might...

Clock face of Big Ben.

Scientists and Their Inventions Quiz

From the 16th century onward, the speed of a ship was measured...

Birds, Birds, Birds Quiz

Which birds were released in Central Park in 1890 and 1891 by...

Prairie falcon (Falco mexicanus) in mid-flight.

Know Your Birds Quiz: Part Two

What bird inhabits eastern Australia and may hang around in groups...

Macaw. bird. Scarlet Macaw (Ara macao) in Quantana Roo, Mexico. A large colorful parrot native to tropical North and South America.

Know Your Birds Quiz: Part One

What flightless bird stood one metre tall, lived on the island...

Nine-Banded Armadillo.

A Is for Animal Quiz

How well do you know animals with names that start with the letter...

Mechanism of cellular autophagy, illustration for Nobel Prize Award in Medicine 2016. 3D illustration showing fusion of lysosome with autophagosome containing microbes and molecules.

Parts of a Cell Quiz

What is the thin layer that forms the outer boundary of a cell?...

Beet. Beta vulgaris. Sugar beet. Two rows of harvested beets.

History of Scientists, Inventors, and Inventions Quiz

Who developed the neon lamp? Who is credited with the invention...

Illustration of molecules. (molecular, chemistry, science)

So Much Chemistry, So Little Time Quiz

Which French chemist was the first to isolate codeine? Who is...

Modernist Cuisine, searing with a blowtorch.

Smorgasbord of Swedish Inventors Quiz

Which Swedish physician worked with his physicist friend Carl...

Double exposure of science laboratory test tubes with bokeh and chemical reaction

Types of Chemical Reactions

Can you identify which type of chemical reaction is shown? Test...

Italian-born physicist Dr. Enrico Fermi draws a diagram at a blackboard with mathematical equations. circa 1950.

Define It: Math Terms

Here is your mission, should you choose to accept it: Define...

Italian physicist Guglielmo Marconi at work in the wireless room of his yacht Electra, c. 1920.

All About Physics Quiz

Who was the first scientist to conduct a controlled nuclear chain...

Fruit. Grape. Vitis vinifera. Blauer Portugieser. Wine. Wine grape. Autumn. Grape leaves. Two clusters of Blauer Portugieser grapes on the vine.

Quiz: Can You Tell a Fruit from a Vegetable?

Do you still have to ask yourself whether a tomato is a fruit...

Red grapes grow in a vineyard.

Do You Know Where These Weird Fruits and Vegetables Came From?

Do you know where your food comes from (other than “the grocery...

Maps of Magnitude 6.0 (M6.0) August 24, 2014 South Napa California Earthquake. Earthquake lies within a 70-km-wide (44 miles) set of major faults of the San Andreas Fault system. tectonic plates, San Francisco, Napa Valley Earthquake

Earthquakes: Fact or Fiction?

Interested in testing your earthquake knowledge? Shake your way...

A person's hand pouring blue fluid from a flask into a beaker. Chemistry, scientific experiments, science experiments, science demonstrations, scientific demonstrations.

Ins and Outs of Chemistry

You may know that elements make up the air we breathe and the...

Platypus (Ornithorhynchus anatinus) swimming on the surface of a creek. Water Australia mammal monotreme

The Weirdest Animals in the World Quiz

You may think you understand the animal kingdom—but let’s take...

Buzz Aldrin. Apollo 11. Apollo 11 astronaut Edwin Aldrin, photographed July 20, 1969, during the first manned mission to the Moon's surface. Reflected in Aldrin's faceplate is the Lunar Module and astronaut Neil Armstrong, who took the picture.

Fact or Fiction: Visiting the Moon

What actually happens when man makes it to the Moon? Test your...

NOAA satellite image of Hurricane Katrina taken onaugust 28, 2005. On August 28, 2005, Hurricane Katrina was in the Gulf of Mexico where it powered up to a Category 5 storm on the Saffir-Simpson hurricane scale packing winds estimated at 175 mph.

What’s the Weather Today? Fact or Fiction

Improve your small talk game by learning what’s really going...

Scenic landscape of apple tree on field with seasons changing from Summer to Winter, solstice

Quick Quiz: Winter Solstice

Brrr. Ever wonder if there’s a little more to winter than meets...

13 True-or-False Questions from Britannica’s Easiest Science Quizzes

Sometimes we here at Britannica hear that our quizzes are too...

27 True-or-False Questions from Britannica’s Most Difficult Science Quizzes

How much do you know about Mars? How about energy? Think it’ll...

space debris in Earth orbit, dangerous junk orbiting around the blue planet

True or False: All About the Earth

When did people really start believing that the Earth is round?...

DNA helix in a futuristic concept of the evolution of science and medicine.

Genes and Alleles: Fact or Fiction?

Genes are an important part of who you are—but how much do you...

Dinosaur hatchling fossil

True or False: What Dinosaurs Ate

You probably already knew that not all dinosaurs were meat-eaters....

Hedgehogs. Insectivores. Erinaceus europaeus. Spines. Quills. Close-up of a hedgehog rolled up.

Unconventional Pets Quiz

Would you have a pet with spines? What about one that can fit...

Two sea lion pups on rocky beach

True or False: Can You Tell a Seal From a Sea Lion?

Technically, seals and sea lions are in the same taxonomical...

Close-up of a purple crocus plant, of the iris family (Iridaceae); location: Chicago, Illinois. (pollen, pollination, stamens, flowers, plants)

Can You Identify These Poisonous Plants?

Before you go foraging for salad ingredients, check your score...

Aedes aegypti mosquito, a carrier of yellow fever, dengue, and dengue hemorrhagic fever.

True or False: Biting Bugs

“Yikes, that itches!” How much do you really know about the reasons...

Flying bat

Bats: True or False?

Are bats really blind? How many species of bats are there, anyway?...

Common, or southern, cassowary (Casuarius casuarius).

The Most Dangerous Birds In The World Quiz

You don’t want to run into these birds unannounced—but do you...

Pregnant woman holding headphones on her belly

True or False: Pregnancy Myths

Can morning sickness predict a baby’s sex? Should pregnant people...

Fruit. Grapes. Grapes on the vine. White grape. Riesling. Wine. Wine grape. White wine. Vineyard. Cluster of Riesling grapes on the vine.

Wining and Dining Quiz

What are the three steps of wine tasting? What kind of wine is...

Periodic table of the elements. Left column indicates the subshells that are being filled as atomic number Z increases. The body of the table shows element symbols and Z. analysis and measurement

Periodic Table of the Elements

Test your bond with the periodic table of elements in this quiz...

Buzz Aldrin. Apollo 11. Apollo 11 astronaut Edwin Aldrin, photographed July 20, 1969, during the first manned mission to the Moon's surface. Reflected in Aldrin's faceplate is the Lunar Module and astronaut Neil Armstrong, who took the picture.

Can You Match The Moon To Its Planet? Quiz

You may be the expert on Earth’s Moon. But how much do you know...

cat. orange and white persian cat with long hair, snarl, growl, teeth

True or False Quiz: Cats Edition

Cats may not be called man’s best friend, but they’re still a...

Close-up of limes. (citrus fruit; food)

A Few Facts About Food Processing Quiz

How much do you know about where your food comes from? What about...

ball bearing. Disassembled ball bearing. rotational friction Automobile Industry, Engineering, Industry, Machine Part, Metal Industry, Sphere, Steel, Wheel

Inventors and Inventions

Our earliest human ancestors invented the wheel, but who invented...

Bernese mountain dog laying on grass.

For the Love of (Purebred) Dogs Quiz

Whether you prefer poodles, schnauzers, or greyhounds, there’s...

wasp. Vespid Wasp (Vespidaea) with antennas and compound eyes drink nectar from a cherry. Hornets largest eusocial wasps, stinging insect in the order Hymenoptera, related to bees. Pollination

Creepy Crawlies Quiz

Do we really swallow spiders when we sleep? How long do centipedes...

Dogs of different breeds - two border terriers, dachsund, hybrid dog, border collie (mammals, mutts, pets, purebreds, Canis lupus familiaris).

All About Pets Quiz

Whether you’re a cat person or a dog person (or a bird person,...

Sundew. Drosera. Droseraceae. Drosera capensis. Cape sundew. Insect-eating plants. Carnivorous plants. Close-up of a cape sundew plant.

Carnivorous Plants Quiz

There’s more to the world of carnivorous plants than meets the...

Diversity among heteropterans. lace bug, termite bug, coreid bug, bat bug, toad bug, water strider, backswimmer, bedbug, stinkbug, water scorpion, plant bug, insects

All About Biology Quiz

What is another name for the so-called sea wasp? What continent...

Model of a molecule. Atom, Biology, Molecular Structure, Science, Science and Technology. Homepage 2010 arts and entertainment, history and society

What Lies Beneath the Skin: A Human Anatomy Quiz

The human body is made up of many different systems working together...

Close up of saltwater crocodile as emerges from water with a toothy grin. The crocodile's skin colorings and pattern camouflage the animal in the wild.

Can You Tell An Alligator From A Crocodile? Quiz

Alligators and crocodiles share a number of features, including...

Sumatran tiger (panthera tigris sumatrae) in water

“Lions and Tigers and Bears, Oh My!” Quiz

“Lions and tigers and bears, oh my!” There’s a lot to learn about...

Fruit. Grapes. Grapes on the vine. White grape. Riesling. Wine. Wine grape. White wine. Vineyard. Cluster of Riesling grapes on the vine.

Quick Quiz: Champagne

What is champagne named after? Which grapes are used to make...

A patient having surgery in 1898. History of medicine, history of surgery, surgical history.

History of Lobotomy Quiz

Today lobotomy is a horror story; less than a century...

Spotted hyena or laughing hyena (Crocuta crocuta), South Africa. (scavenger; African animal, mammal).

Weird Animals Quiz

Why does your cat hate water? Why do flamingoes stand on one...

Turtle, tortoise, reptile. Uses assets 88582 & 89606

Turtle or Tortoise?

Let’s get this out of the way first: all tortoises are turtles....

Buffalo Bill. William Frederick Cody. Circus poster, I am coming, Col. W.F. Cody. Portrait of Buffalo Bill (1846-1917) on stampeding bison (buffalo). Folk hero of the American West. Chromolithograph, c1900

Buffalo or Bison?

What’s the difference between buffalo and bison? Take this quick...

M101 (NGC 5457, The Pinwheel Galaxy). Hubble Space Telescope image of face-on spiral galaxy Messier 101 (M101). Largest most detailed photo of a spiral galaxy that has ever been released from Hubble. Created from 1994-2003

Everything in Space in a 25-Minute Quiz

Ever wanted to visit everything in outer space in only 25 minutes?...

Laboratory glassware (beakers)

Know Your Chemistry Quiz

From the elements of the periodic table to the processes that...

The Space Shuttle Columbia soars from Launch Pad 39A on July 1 1997 to begin the 16-day STS-94 Microgravity Science Laboratory-1 (MSL-1) mission.

People in Space Quiz

People have been traveling into space, in a physical sense, since...

Three flint axes from the stone age. (prehistoric, tools, early humans, culture, archaeology, implements)

Quick Quiz: Humans and Their Remains

Lucy and Ötzi and the Java Man, oh my! Dive into the world of...

36 Questions from Britannica’s Most Popular Science Quizzes

How well do you know astronomy? How about quantum mechanics?...

View of the Andromeda Galaxy (Messier 31, M31).

Astronomy and Space Quiz

What makes a planet a dwarf planet? How many miles are in a light-year?...

Cross section of Earth showing the core, mantle, and crust

The Solid Earth Quiz

The term geology refers, according to Britannica,

Giraffe standing in grass, Kenya.

Know Your Mammals Quiz

Where can you find a capybara? How many cervical vertebrae do...

Archaea at Midway Geyser Basin in the Grand Prismatic Spring, Yellowstone National Park, Wyoming. Largest hot spring in Yellowstone, third largest in the world. Temp. 147-188F Dim. 250x380 ft. Archaeon, archeon, Yellowstone Geysers, algae

How the Earth Works: A Quiz

The Earth sciences tell us how the Earth works. See how much...

trees deciduous and coniferous. trees grow on a bank of a forest in springtime in Alberta, British Columbia, Canada. logging, forestry, wood, lumber, wilderness

All Things Green Quiz

No need to romaine calm—it’s the plant quiz you’ve been...

Humpback whale breaching out of the ocean. (sea mammal; ocean mammal)

A Quiz from Shrews to Whales

Shrews are tiny. Whales are massive. Find out what you know about...

Equations written on blackboard

All About Math Quiz

Your algebra teacher was right. You will use math after graduation—for...

Mushrooms growing in forest. (vegetable; fungus; mushroom; macrofungi; epigeous)

Science at Random Quiz

Which kingdom do mushrooms belong to? What dinosaur was a chicken-size...

Mamba. Black mamba snake in a tree in South Africa. The best known Mamba is the black mamba, D. polylepis (Dendroaspis polylepis). Among deadliest of the world's snakes.

All About Reptiles and Amphibians Quiz

Snakes and turtles and frogs, oh my! Some people find these creatures...

Concept artwork on the periodic table of elements.

118 Names and Symbols of the Periodic Table Quiz

An elementary quiz about fundamental matters.

wasp. Vespid Wasp (Vespidaea) with antennas and compound eyes drink nectar from a cherry. Hornets largest eusocial wasps, stinging insect in the order Hymenoptera, related to bees. Pollination

Know Your Bugs Quiz

Which of these insects includes a “slave-maker” that bites the...

Illustrated strands of DNA. Deoxyribonucleic acid, biology.

Genetics Quiz

Who deduced that the sex of an individual is determined by a...

tropical two-wing flying fish (Exocoetus volitans). Beloniformes, ichthyology, fish plates, marine biology, tropical two wing flying fish, tropical two-wing flyingfish, tropical two wing flyingfish, tropical fish, fishes, animals.

Know Your Fish Quiz

Which fish is known as a living fossil? What is the name for...

sun. Setting of the sun with evening light in the evening sky over water. Sunrise, sunset, star, orange, ocean, sea

Oceanography Quiz

There is much to study in Earth’s oceans and seas, from their...

ore. iron ore minerals, rock, metal, metallic iron

Rocks, Minerals, and More Quiz

What mineral forms stalactites and stalagmites in underground...

Iceland, Glacier lagoon (Jokulsarlon)

Quick Quiz: Glaciers

Glaciers are large masses of ice. This is a miniscule three-question...

How Much Do You Know About Physics?

From cathode-ray tubes to quantum states, this quiz will test...

Matter and More Quiz

Physics,

Stratosphere. cloud. View of horizon from airplane of Cumulus clouds. Cirrus, Stratus, weather

Up in the Sky Quiz

Which two gases combine with water to form acid rain? Where do...

atom. Orange and green illustration of protons and neutrons creating the nucleus of an atom.

Another Physics Quiz

What is the basic unit of work? What does the pitch of a sound...

Great Grey Owl or Great Gray Owl (Strix nebulosa), Alaska. Wood owls, birds.

All About Birds Quiz

What is a gizzard? Who won a Nobel Prize for quacking at baby...

Honeybees working on honeycomb.

Bees Quiz

How much do you know about bees? Test your knowledge with this...

Model of a molecule. Atom, Biology, Molecular Structure, Science, Science and Technology. Homepage 2010 arts and entertainment, history and society

Science Quiz

Put your science smarts under the microscope and see how much...

Combination shot of Grinnell Glacier taken from the summit of Mount Gould, Glacier National Park, Montana in the years 1938, 1981, 1998 and 2006.

Pop Quiz: 18 Things to Know About Global Warming

Photosynthesis diagram showing how water, light, and carbon dioxide are absorbed by a plant and that oxygen and sugars are produced. Also show a person to illustrate the oxygen/carbon dioxide cycle between plants and animals.

Pop Quiz: 13 Things to Know About Photosynthesis

Planet Neptune

Giants of Our Solar System

Sometimes called the gas, ice, or giant planets, Jupiter, Saturn,...

Plastic bag garbage on beach. (pollution; land fill; trash; water pollution; waste)

Pollution

The pollution of Earth’s waterways, land, and atmosphere has...

Pollination. Bee collecting pollen & nectar from a flower. Plant insect

Biodiversity Loss

Do you know about the threats facing nonhuman life on Earth?...

Specially designed Cassini orbits place Earth and Cassini on opposite sides of Saturn's rings, a geometry known as occultation. Cassini conducted the first radio occultation observation of Saturn's rings on May 3, 2005. (solar system, planets)

Saturn

What’s in Saturn’s atmosphere? Who discovered Saturn’s rings?...

Almond, Food, Nut, food, Snack, Raw Food

Nut or Not?

Do you know which culinary nuts are true botanical nuts?

Great Grey Owl or Great Gray Owl (Strix nebulosa), Alaska. Wood owls, birds.

Owl Quiz

How much do you know about owls?

Ultraviolet image of Venus' clouds as seen by the Pioneer Venus orbiter; February 26, 1979.

Venus

How much do you know about the second planet from the Sun? Test...

Cave pool thermal spring in Grjotagja Cave, near Myvatn lake in Iceland. Groundwater. Lava cave

Groundwater Quiz

You may know all about what happens to water aboveground, but...

Pangaea (Pangea) was a supercontinent 225 million years ago formed by plate tectonics and continental drift.

Name That Geologic Interval

How much do you really know about Earth’s geologic history?

Collage of different cats. Made for the cat quiz on Mendel

Cat Quiz

How much do you know about cats?

Cougar in woods. Cats, felines, puma.

The Big Cats

Although photographs and videos of cute domesticated cats are...

Periodic table of the elements. Chemistry matter atom

Chemistry: Fact or Fiction?

Test your knowledge of the fascinating science of chemistry.

Illustrated strands of DNA. Deoxyribonucleic acid, biology.

Designing Life: A Quiz About Genetic Engineering

What is a genetically modified organism? What makes genetic recombination...

Later stage of cellular development with 12 cells within a clear cell membrane, against blue-stained background. Horizontal format.

Embryos: Fact or Fiction?

What do you know about embryos? Test your knowledge with this...

Dog playing and chasing ball. (pet; canine; domestic animal)

Dogs Quiz

Test your knowledge about dogs with this quiz.

Capybara (Hydrochoerus hydrochaeris)with young, a semiaquatic mammal of Central and South America.(rodents, carpincho, water hog)

Capybaras

How much do you know about these giant lovable critters? Test...

Cluster of green ferns. Pteridophytes, plants, greenery, flora, tracheophytes.

Botany Basics: Fact or Fiction?

How much do you know about plants? Test your knowledge of botany...

Boomslang snake (Dispholidus typus) Venomous, poisonous. Africa.

Venom and Poison

Think you know about poisons? Take this venomous quiz to test...

DNA helix in a futuristic concept of the evolution of science and medicine.

Branches of Genetics

Microbial versus molecular? Behavioral versus evolutionary? Test...

Diversity among heteropterans. lace bug, termite bug, coreid bug, bat bug, toad bug, water strider, backswimmer, bedbug, stinkbug, water scorpion, plant bug, insects

What’s Bugging You?

Do you know what makes a bug a bug? Test your knowledge with...

Group of Homosapiens, Australopithecus afarensis, Homo erectus, Homo habilis, and Neanderthal.

Australopithecus vs. Homo

Were Neanderthals of the genus Homo? What about the famous fossil...

Bongo antelopes, Striped antelope called bongos live in the thick rain forests in the southern part of the Central African Republic.

What Kind of Animal?

What do you know about animal nomenclature? Take this quiz and...

$Elementary Particles series. Interplay of abstract fractal forms on the subject of nuclear physics, science and graphic design. Quantum wave, quantum mechanics$

Quantum Mechanics

Think you know about quantum mechanics? Take this quiz. No points...

This artist's concept illustrates Kepler-16b, the first planet known to definitively orbit two stars -- what's called a circumbinary planet. The planet, which can be seen in the foreground, was discovered by NASA's Kepler mission. The two orbiting stars r

Extrasolar Planets

There are thousands of planets outside our solar system. Test...

Humpback whale breaching out of the ocean. (sea mammal; ocean mammal)

Fishes vs. Mammals

Fishes and mammals are obviously different, right? Then you should...

Two ring-tailed lemurs (Lemur catta), sitting in a tree, Madagascar.

Lemurs: Fact or Fiction?

How much do you know about these odd-looking creatures? Test...

A moth of the genus Hemaris. part of the insets unclocked project

Insect Wings: Fact or Fiction?

What do you know about insect wings? Test your knowledge with...

Mating snails. Extreme close-up

Animal Mating Behavior

What do you know about animal mating behavior? Take this quiz...

bulldog with tiara and pink boa

Celebrities’ Pets’ Names

Celebrities have some very cute animals to call their own, and...

The Space Shuttle Columbia soars from Launch Pad 39A on July 1 1997 to begin the 16-day STS-94 Microgravity Science Laboratory-1 (MSL-1) mission.

Space Records

Have you got the right stuff? Show what you know about the many...

Cute kitten and puppy (labrador) outdoors in the grass. Two different furry mammals have three kinds of hair: guard hairs, whiskers and soft underhairs. cat and dog, animal friends, funny young pets. Same as asset 166986/ic code pet000014, different right

Canines vs. Felines

Do you think you can tell canines and felines apart? Test your...

Manure, a mixture of animal excrement and straw, sits in a pile in a field in France.

All About Poop

Know a thing or two about number two? Squeeze this quiz in before...

Chutes d'Ekom - a waterfall on the Nkam river in the rainforest near Melong, in the western highlands of Cameroon in Africa.

Ecosystems

There are a lot of ecosystems in the world. How much do you know...

Edwin E. Aldrin (Buzz Aldrin) stands on the moon, Apollo 11

Famous Astronauts and Cosmonauts

Test your knowledge of those who had the right stuff to travel...

Blueberries (Vaccinium) in a bowl. Fruit berry

Tasty Taxonomy

How well do you know the taxonomy of the plants you eat?

A lion (Panthera leo) eating its prey.

Pounds of Flesh: How Much Can They Eat?

When you don’t know when your next meal might walk by, portion...

American alligator hatchling. (endangered species; reptile; baby animal; reptile egg; animal birth; hatching)

About to Pop: How Many Babies?

How many babies does a fox typically have? What about a tiger?...

Thunderstorm cumulonimbus clouds above Montana. weather storm thunderstorm atmospheric disturbance cumulonimbus clouds thunder and lightning Homepage blog 2011, science and technology

Clouds and Cloud Types

Think you know every cloud type? Test your knowledge with this...

Group of horses. Herd of running Horses in Colorado, Western United States of America. Animal, running, horsemeat, horse meat.

Thereby Hangs a Tail: Famous Horses

Can you identify these well-known horses?

Florida manatee (T. manatus latirostris), in Atlantic Ocean (sea cow; sea mammal; aquatic mammal)

Manatees: Fact or Fiction?

How many species of manatees are there? How fast can manatees...

Gourds and pumpkins

Oh My Gourd

Are you out of your gourd about gourds? Test your knowledge of...

Scientists combine four images from New Horizons Long Range Reconnaissance Imager (LORRI) with Ralph instrument infrared images to create this false color global view of dwarf planet Pluto on July 14, 2015, 280,000 miles away from the spacecraft.

Pluto

How much do you know about Pluto? See if your knowledge is astronomical—or...

Currency. Money. Cash. Dollars. Bills. Pile of ten, twenty, fifty, and hundred dollar bills.

Macroeconomics Basics

Do you know a Phillips curve from an Engle curve? Inflate your...

Big Kmart store in Ontario, Ore.

Microeconomics Basics

What is the "invisible hand"? Does taking this quiz have any...

Herd of African elephants and their calves in African savannah with egrets. Outdoors, grassland, mammal, maternal, animal, safari, plains, wildlife, family.

Elephantidae: Fact or Fiction?

Can elephants run? How long does an elephant live? Test your...

Sea otter (Enhydra lutris), also called great sea otter, rare, completely marine otter of the northern Pacific, usually found in kelp beds. Floats on back. Looks like sea otter laughing. saltwater otters

Animal Group Names

You’ve heard of a herd of cattle, but what is a group of jellyfish...

Flower. Day lily, Day Lilies.Daylily. Daylilies. Garden. Close-up of pink daylilies in bloom.

(Not) All in the Family

Plants have families, too! Try to figure out which plants don’t...

A whale shark (Rhincodon typus) near a snorkeller in Australia. The huge fish feed on small organisms filtered from the water and are not dangerous to humans. Scuba diver, fishes, ichthyology, fish plates, marine biology, sharks, giant fishes

Sharks: Fact or Fiction?

Is it true that sharks have to swim continuously? How many teeth...

Approximate-natural-colour (left) and false-colour (right) pictures of Callisto, one of Jupiter's satellitesNear the centre of each image is Valhalla, a bright area surrounded by a scarp ring (visible as dark blue at right).Valhalla was probably caused b

This or That?: Moon vs. Asteroid

So you’ve got the planets down pat--let’s see if you know your...

Slowworm. Anguis fragilis. Blindworm. Lizard. Anguidae. Slowworm in the palm of a hand.

This or That? Warm-blooded vs. Cold-blooded

Some animals regulate their body temperature naturally, and some...

Weed. Flower. Taraxacum. Dandelion. T. officinale. Close-up of yellow dandelion flowers.

This or That? Annual vs. Perennial

Do you know which plants come back year after year? Test your...

Hedgehogs. Insectivores. Erinaceus europaeus. Spines. Quills. Close-up of a hedgehog rolled up.

Animal Jumble: Fact or Fiction?

Are elks vegetarians? How much does the smallest mongoose weigh?...

Pig. Hog. Suidae. Sus. Swine. Piglets. Farm animals. Livestock. Pig sitting in mud.

Animal Adventures: Fact or Fiction?

Can animals survive being frozen? Do only male animals have antlers?...

Cattle. Cow. Bovine. Livestock. Farm animals. Pregnant brown and white dairy cow.

Bovine: Fact or Fiction?

Which country raises the most cattle? Are cape buffalo the same...

Dama gazelle (Nanger (or Gazella) dama)

Antelopes: Fact or Fiction?

Do antelopes have good hearing? Do gazelles have any teeth? Discover...

The brown bear (Ursus arctos), grizzly bear in the wilderness, Alaska.

Bear in Mind: Fact or Fiction?

Do brown bears live in the southern hemisphere? Do polar bears...

hyena in grassland; mammal, canine, carnivore

Hyenas and Aardwolves: Fact or Fiction?

Where can aardwolves be found? Do hyenas live in trees? Sort...

General Sherman, the world's tallest giant sequoia (Sequoiadendron giganteum), Sequoia National Park, California. (redwoods, forests, trees)

Trees of the World: Fact or Fiction?

Did trees evolve hundreds of millions of years ago? Are birch...

Sundial (time; clock; timepiece)

The Sun: Fact or Fiction?

Does the Earth revolve around the Sun once per month? Are sunspots...

NOAA satellite image of Hurricane Katrina taken onaugust 28, 2005. On August 28, 2005, Hurricane Katrina was in the Gulf of Mexico where it powered up to a Category 5 storm on the Saffir-Simpson hurricane scale packing winds estimated at 175 mph.

Weather: Fact or Fiction?

Is the center of a tropical storm called a window? Does a barometer...

The ESO 3.6-metre telescope at La Silla, during observations in Chile. Milky Way galaxy in sky. (European Southern Observatory)

Seeing Stars: Fact or Fiction?

Are there twelve signs in the zodiac? Is Sirius the brightest...

Encyclopaedia Britannica First Edition: Volume 2, Plate XCVI, Figure 1, Geometry, Proposition XIX, Diameter of the Earth from one Observation

Mathematics: Fact or Fiction?

Will parallel lines eventually meet? Does a rectangle have three...

Venn diagram showing sets and subsets of Triangles

Mathematics

What number did the ancient Egyptians consider to be sacred?...

Three types of eels. Fish / Anguilliformes / American eel (Anguilla rostrata), European eel (Anguilla anguilla), conger eel (Conger oceanicus)

Eels: Fact or Fiction?

Do eels live in freshwater and saltwater? How many kinds of eels...

Bird’s Eye View: Fact or Fiction?

Are chickens related to pheasants? How many varieties of turkeys...

Beaver gnawing on log. mammal / rodentia / Castor canadensis

Of Mice and Other Rodents: Fact or Fiction?

Are rabbits rodents? Can mice cause fires? Find the answer to...

Mamba. Black mamba snake in a tree in South Africa. The best known Mamba is the black mamba, D. polylepis (Dendroaspis polylepis). Among deadliest of the world's snakes.

Reptiles: Fact or Fiction?

How many species of reptiles exist? Do reptiles practice estivation?...

Slowworm. Anguis fragilis. Blindworm. Lizard. Anguidae. Close-up of a slowworm's head.

Snakes and Lizards: Fact or Fiction?

Do pit vipers live in pits? How many venomous species of lizards...

Turtle, green turtle, Chelonia mydas, chelonian, reptile, animal

Turtles: Fact or Fiction?

Can turtles catch colds? Can turtles run? Get under the shells...

tropical two-wing flying fish (Exocoetus volitans). Beloniformes, ichthyology, fish plates, marine biology, tropical two wing flying fish, tropical two-wing flyingfish, tropical two wing flyingfish, tropical fish, fishes, animals.

Fish in the Sea: Fact or Fiction?

Can fish get thirsty? Do sharks use electricity to hunt? Sort...

Dark-fingered coral crab in an Indo-Pacific coral reef. (coral reefs; endangered area; ocean habitat; sea habitat)

Crustaceans: Fact or Fiction?

Can crabs only live in salt water? Do crabs experience metamorphosis?...

Camel. Camelus. Desert. Sand. Sunset. Camel with colorful saddle crosses desert in India at dusk.

Camels: Fact or Fiction?

Do you know where camels originated? Exactly how long can they...

gray wolf. Wolf. Gray wolf (Canis lupus) grey wolf also called timber wolf largest wild member of the dog family (Canidae). Endangered species.

Cry Wolf: Fact or Fiction?

What do wolves eat? How many species of wolves are there? Sort...

space shuttle. Space Shuttle Columbia (OV-102) leaving launching pad, Kennedy Space Center, Florida. Columbia launch. Destroyed at re-entry Feb. 1, 2003 at the end of its 28th mission. Blog, homepage, launch pad, lifting off, lift-off, lift off

Space Exploration: Fact or Fiction?

Were all the Apollo astronauts trained scientists? Is the European...

Woman opening umbrella on windy day. (monsoon; rain; raincoat; wind)

Weather and Seasons: Fact or Fiction?

Do January and June contain equinoxes? Does the summer solstice...

wasp. Vespid Wasp (Vespidaea) with antennas and compound eyes drink nectar from a cherry. Hornets largest eusocial wasps, stinging insect in the order Hymenoptera, related to bees. Pollination

Animals and Insects: Fact or Fiction?

Is a humbug a kind of bee? Does mutualism refer to an animal’s...

George Washington Bridge vehicular suspension bridge crossing the Hudson River, U.S. in New York City. When finished in 1931 it was the longest in the world. Othmar Ammann (Othmar Herman Ammann) engineer and designer of numerous long suspension bridges.

Architecture and Building Materials: Fact or Fiction?

Is concrete a mixture of sand and steel? Do suspension bridges...

atom. Orange and green illustration of protons and neutrons creating the nucleus of an atom.

Chemistry and Biology: Fact or Fiction?

Are enzymes catalysts? Are atoms invisible? Sort fact from fiction—and...

Mount Everest. Image of the Himalayas, looking south from over the Tibetan Plateau, taken by astronauts on board the International Space Station on January 28, 2004. Makalu at left and Mount Everest at right.

Mountains and the Sea: Fact or Fiction?

Do tsunamis travel faster on open sea than near land? Do most...

Roman numerals of the hours on sundial (ancient clock; timepiece; sun dial; shadow clock)

Geography and Science: Fact or Fiction?

Was the sundial invented in Egypt? Was the first greenhouse built...

Monsoon winds blowing palm trees illustration. (wind; hurricane; windstorm)

Wind and Air: Fact or Fiction?

Do trade winds blow from north to south? Are aerosols small particles?...

In his Peoria, Illinois, laboratory, USDA scientist Andrew Moyer discovered the process for mass producing penicillin. Moyer and Edward Abraham worked with Howard Florey on penicillin production.

General Science: Fact or Fiction?

Is an ultraviolet ray longer than an X-ray? Is the technical...

Vega. asteroid. Artist's concept of an asteroid belt around the bright star Vega. Evidence for this warm ring of debris was found using NASA's Spitzer Space Telescope, and the European Space Agency's Herschel Space Observatory. asteroids

Space Objects: Fact or Fiction

Are most meteorites that strike Earth unrecorded? Did the world’s...

gold. metal. Stacks of gold bars. Blocks of metallic gold. yellow precious metal, gold block, block of gold, money, mercantilism

Precious Metals and Stones: Fact or Fiction?

Is there any gold in the ocean? Are diamonds found on every continent?...

Obsidian boulders from lava flow. (volcanic, eruption, rock, glass, volcano, rocks)

Rocks and Minerals: Fact or Fiction?

Is the Grand Canyon 2 billion years old? Can you find magnesium...

Plastic beach ball on white background. (balls; toys; beachball)

Plastics: Fact or Fiction?

Are some forms of plastic stronger than steel? From celluloid...

Forklift truck. Illustration of a yellow fork lift truck for elevating or lowering a load. Construction, industry, transportation, lift truck, fork truck.

Engines and Machines: Fact or Fiction?

Is a gasoline engine more efficient than a diesel engine? Is...

black hole. gravitational lens. Artist's rendering of a black hole formed by the death of a massive star. gravity, gravitational pull, gravitational field

Galaxies and the Milky Way: Fact or Fiction?

Is Earth’s galaxy called the solar system? Is the largest galaxy...

trees deciduous and coniferous. trees grow on a bank of a forest in springtime in Alberta, British Columbia, Canada. logging, forestry, wood, lumber, wilderness

Grasses and Other Plants: Fact or Fiction?

Can carnivorous plants eat humans? Is grass the plant type with...

Artist's conception of closest known planetary system to our own Epsilon Eridani. Hosts two asteroid belts. The star is so close & similar to our sun thus popular in science by Issac Asimov, Frank Herbert, TV series Babylon 5.

Planets in Space: Fact or Fiction?

Is Uranus a solid mass of rock? Is Pluto considered a planet?...

Deciduous forest with moss covering fallen tree.

Moss, Seaweed, and Coral Reefs: Fact or Fiction?

Are most seaweed made of flowering plants? Are coral reefs mostly...

Microscope (medical, science, research, magnify, object, outlined, biology).

Microscopes and Telescopes: Fact or Fiction?

Is the Hubble Space Telescope named for a scientist? Is a microscope...

earth. Cross section illustration of the layers of Planet Earth with liquid layer of outer core, crust, mantle and inner core.

Characteristics of Earth: Fact or Fiction?

Is it true that life can only evolve on Earth? From our planet’s...

A composite of six separate orbits taken on January 23, 2012 by the Suomi National Polar-orbiting Partnership satellite. It was taken by a new instrument flying aboard Suomi NPP, the Visible Infrared Imaging Radiometer Suite (VIIRS) Blue Marble 2012 Earth

Planet Earth: Fact or Fiction?

Are all icebergs found near the Earth’s poles? Is hydrogen common...

Stratosphere. cloud. View of horizon from airplane of Cumulus clouds. Cirrus, Stratus, weather

Clouds: Fact or Fiction?

Are clouds made up of water? Are the highest clouds called stratus?...

Diagram of a storm. updraft, downdraft, cumulonimbus cloud, thunderstorm, air, atmosphere

The Atmosphere: Fact or Fiction?

Is Earth the only planet with an atmosphere? From carbon dioxide...

Petrochemical. Petrochemical plant with distillation towers at twilight. Carbon Dioxide, Chimney, Environmental Damage, Factory, Fossil Fuel, Power Generation, Gasoline, Greenhouse Gas, Natural Gas, Oil, Pollution, Refinery, Smoke Stack, petroleum

Oil and Natural Gas: Fact or Fiction?

Are there only a few million barrels of oil left in the world?...

Oil change. Chaging oil. Petrochemical. Carbon Dioxide, Fossil Fuel, Power Generation, Gasoline, Greenhouse Gas, Natural Oil, Pollution, petroleum, car

Petroleum: Fact or Fiction?

Is crude oil usually black? Is natural gas a kind of petroleum?...

wave. ocean. Cresting ocean wave. Large sea waves. storm, hurricane, tropical cyclone

Oceanic Mass: Fact or Fiction?

Does the ocean ever stand still? Is most of the world’s salt...

Laboratory glassware (beakers)

Chemistry Basics: Fact or Fiction?

Does all matter have mass and density? Are there three classical...

bacterial cell, antibiotic resistance, prokaryotic cell

Bacteria, Mold, and Lichen: Fact or Fiction?

Is penicillin made of mold? Can fungi photosynthesize? Sort fact...

Thermometer, measuring 0 degrees Celsius and 32 degrees Fahrenheit.

Mathematics and Measurement: Fact or Fiction?

Does the concept of zero come from Indian mathematics? Is a jiffy...

periodic table. Periodic table of the elements. Physics, Chemistry, Science

Chemical Elements: Fact or Fiction?

Is iron the most abundant element in the universe? From helium...

Thunderstorm cloud-to-ground lightning discharge with cumulonimbus clouds in field. weather storm thunderstorm atmospheric disturbance cumulonimbus clouds thunder and lightning Homepage blog 2011, science and technology

Climate Change: Fact or Fiction?

What is causing the oceans to become more acidic? Do plants and...

Cyclone winds in aerial of clouds. (hurricane; storm; wind) This image is most likely digitally altered.

Climate Change

Which gases play an important role in climate change? What percentage...

Albert Einstein ca. 1947. German-born physicist who developed the special and general theories of relativity and won the Nobel Prize for Physics.

All About Einstein

You’ve probably heard of Nobel Prize-winner Albert Einstein,...

11:058-59 Newton, Sir Isaac: An Apple, An Idea, portrait of Isaac Newton; apple falls from tree and hits him on the head; gravity of sun and planets

Physics: Fact or Fiction?

Was Isaac Newton inspired to think about gravity by watching...

US Skylab space station in orbit. After the Apollo missions, the next major NASA venture was the Skylab manned earth satellite program. The orbiting laboratory was launched on May 14, 1973, and during the year three separate crewsof three men were sent up

Space Travel: Fact or Fiction?

Was Mariner 1 the first spacecraft to photograph Earth from the...

African savanna elephant (Loxodonta africana); exact location unknown.

Elephants: Fact or Fiction?

Can elephants jump? Are they color-blind? Uncover the answer...

cat. orange and white persian cat with long hair, snarl, growl, teeth

Felines: Fact or Fiction?

Do all cats have tails? Do they all purr? Find out these answers...

Cheetah (Acinonyx jubatus); Kenya. (cats)

The Cat’s Meow: Fact or Fiction?

Is a liger a real animal? Do cats like sugar? Test your knowledge...

Squirrel monkey. Arboreal monkey, family Cebidae a common primate in riverside forests of Central America. Saimiri sciureus or Saimiri monkey

Primates: Fact or Fiction?

What is the rarest monkey? How many kinds of gibbons are there?...

horse. herd of horses running, mammal, ponies, pony, feral

From the Horse’s Mouth: Fact or Fiction?

Can horses only be born at a certain time of the year? What do...

horse. white horse against blue sky, mammal

Horses: Fact or Fiction?

Where did horses evolve? Which breed is the tallest? Test your...

Giraffe standing in grass, Kenya.

Giraffes: Fact or Fiction?

Do giraffes make any noises? Do they sleep standing up? Learn...

prairie dog. An alert Black Tailed Prairie Dog this rodent belongs to the squirrel family and creates underground burrows.

Prairie Dogs: Fact or Fiction?

How many species of prairie dogs are there? Are they actually...

lion. Young male lion in the Maasai Mara National Reserve Narok County, Kenya.

Lions: Fact or Fiction?

Where do lions live? What do they eat? Uncover the truths about...

pigeon. pigeon and dove. member of the order Columbiformes, family Columbidae

Pigeons: Fact or Fiction?

How long have pigeons been domesticated? Where are pigeons found...

Two dinosaur heads showing feeding habits: meat eater ceratosaurus, plant eater psittacosaurus, dinosaurs

Dinosaurs: Fact or Fiction?

Is it common to come across a complete dinosaur skeleton? Was...

wasp. A close-up of a Vespid Wasp (Vespidaea) with antenna and compound eye. Hornets largest eusocial wasps, stinging insect in the order Hymenoptera, related to bees.

Interesting Insects: Fact or Fiction?

How far must a hives of bees fly to produce a kilogram of honey?...

Aedes aegypti mosquito, a carrier of yellow fever, dengue, and dengue hemorrhagic fever.

Mosquitoes: Fact or Fiction?

Small and persistent, these tiny creatures know just how to bug...

butterfly. butterfly and moth. An irridescent male blue butterfly. An insect in the order Lepidoptera

Butterflies and Moths: Fact or Fiction

How many species of butterflies and moths exist? Are moths harmful...

snail and slug. snail. A gastropod, especially one having an enclosing shell, soft-bodied animals called mollusks

Mollusks: Fact or Fiction?

Are snails gastropods? Are clams bivalves? Learn the answers...

ant. The southern wood ant on grass. Also known as Formica rufa, red wood ant or horse ant. insect

Ants: Fact or Fiction?

Can ants be used to predict the weather? How did crazy ants get...

bat. Life cycle. A black flying fox (Pteropus alecto) in Kakadu National Park, Northern territory, Australia. A megabat in the family Pteropodidae. Halloween

Interview with the Vampire (Bat)

While bats of course don’t actually turn into vampires, these...

Camel. Close-up of a head of a camel in an Egyptian desert.

The Animals of Asia

What is the name for a two-humped camel? How large is an adult...

Sun bear, also called bruang, honey bear, or Malayan sun bear (Helarctos malayanus) cub. A bear found primarily in the tropical rainforest.

Mammal Mania

Which mammal has the longest tongue and which was the first to...

vulture. An adult bearded vulture at a raptor recovery center. The Gypaetus barbatus also known as the Lammergeier or Lammergeyer, is a bird of prey and considered an Old World vulture.

Animal Factoids

Which animal is the strongest relative to its size? Which type...

Black eyed tree frog (Agalychnis moreletii)

All About Amphibians

Do you know the first stage in the life cycle of most amphibians?...

elephant. A young elephant splashes with water and bathes in Chitwan National park, Nepal. Mammal, baby elephant, elephant calf

Animals: African Safari

How much does a baby elephant weigh? What is the largest monkey?...

Koala (Phascolarctos cinereus) in a zoo, Australia. (marsupial, koala bear)

Animals Down Under

Australia abounds with native animals big and small. Explore...

wasp. A close-up of a Vespid Wasp (Vespidaea) with antenna and compound eye. Hornets largest eusocial wasps, stinging insect in the order Hymenoptera, related to bees.

The Bug-Eyed Quiz

What is the name for an insect’s egg-laying organ? How many known...

turkey vulture. vulture. Close-up of a head and beak of a Turkey vulture (Cathartes aura).

A Little Bird Told Me

How many eggs do vultures lay? What grows over a turkey’s beak?...

Shiba inu. A young Shiba inu dog called an Ebi a spitz breed dog from Japan. Similar in appearance to the Akita dog. Canine, Purebred

Dog Fun Facts Quiz

How many bones are in a dog’s spine? Which sense does a dog lack?...

Bulldog; dog

Best In Show

How many breeds of dogs are there? What is the largest terrier?...

bat. Life cycle. An Indian Flying Fox (Pteropus giganteus) a megabat in the Pteropodidae family flys near Yala West National Park, Sri Lanka. Greater Indian fruit bat, Giant Fruit Bat, Halloween

Bats: What Vampires Don’t Want You To Know

Do you know what bats use to control their wings? Learn about...

Rattlesnake. A rattle snake coiled on rock. Rattlesnakes are poisonous snakes that have rattles in their tails. Reptile. Possibly mounted or stuffed taxidermy snake.

Vipers, Cobras, and Boas...Oh My!

What is the world’s longest poisonous snake? To which continent...

$Prism illustration (light refraction)$

Optics: Fact or Fiction?

Does sound travel faster than light? Does each color of light...

The Blunted, Bent, False, or Rhomboidal Pyramid, built by Snefru in the 4th dynasty (c. 2575 - 2465 BCE), Dahshur, Egypt. Bent Pyramid of Dahshur, Bent Pyramid at Dahshur, Dashur, Bent Pyramid of King Snefru.

Ancient Life: Fact or Fiction?

From Neanderthals to ancient Egypt, explore early human life...

A few month old newborn human baby with closed eyes naps on a blanket. childhood, cute, sleep, relax, infant, infancy

The Human Experience: Fact or Fiction?

Does human hair grow faster in the summer or in the winter? Are...

human skin. Close-up of age spots and wrinkles on a white male senior's facial skin. complexion, ugly, human face

Human Skin: Fact or Fiction?

Is acne caused by chemical changes in the body? Are differences...

Soyuz. The Soyuz TMA-13 spacecraft in flight after takeoff. A Soyuz mission to the International Space Station (ISS) launched from Baikonur, Province of Kazakhstan, October 12, 2008. spaceship, rocket blast off, space travel

Space-Time and Space-Distance

From light-years to Martian years, test your knowledge of the...

Three graduated beakers with yellow, blue and gree fluid on white background. Chemistry measurement, science experiment, science demonstration

Measurement Mania

What is a meter? How many grams are in a pound? See if your knowledge...

Band of horses in the saltmarsh at Assateague Island National Seashore, Maryland, Virginia, NPS. Assateague's wild horses are actually feral animals, descendants of domestic animals that have reverted to a wild state.

All About Animals

From the evolution of birds and horses to Earth’s tallest land...

View of the Andromeda Galaxy (Messier 31, M31).

The Night Sky: Galaxies and Constellations

In what constellation is Sirius found? How many galaxies are...

hot flying sparks, loud firework exploding, pyrotechnic gunpowder sulfur blast, explosive

The Stuff That Things Are Made Of

Gunsmoke was a popular television program made up of...

greylag. Flock of Greylag geese during their winter migration at Bosque del Apache National Refugee, New Mexico. greylag goose (Anser anser)

Biology Bonanza

What does the word "migration" mean? How many sets of legs does...

ore. iron ore minerals, rock, metal, metallic iron

Metals: Fact or Fiction?

Is iron the most abundant metal in the Earth’s crust? Is potassium...

Hurricane. Storm on Phuket Island, Phuket Province, Tropical Climate, hurricane Homepage blog 2011, science and technology weather storm tropical cyclone

Blowing in the Wind: Fact or Fiction?

Are there winds in space? Are winds caused by waves in the ocean?...

M101 (NGC 5457, The Pinwheel Galaxy). Hubble Space Telescope image of face-on spiral galaxy Messier 101 (M101). Largest most detailed photo of a spiral galaxy that has ever been released from Hubble. Created from 1994-2003

Galaxies: Fact or Fiction?

Does the word "galaxy" come from the Greek word for milk? Can...

M18 is a small star cluster in the constellation Sagittarius.

Constellations: Fact or Fiction?

Is Hydra the largest constellation in the night sky? Are some...

electric power. High-voltage transmission lines carrying electricity. Sunset and electric power lines. Energy, sundown, power supply

Energy: Fact or Fiction?

Can microbes provide energy? How much energy do video games use?...

Paper. Piles of white office paper stacked and tied with red string.

Paper: Fact or Fiction?

What is the most frequently used paper size? How many sheets...

spruce. A young spruce tree grows on a bank of a forest of similar conniferous trees, Alberta, Canada. logging, forestry, wood, lumber

Trees: Fact or Fiction?

How many leaves are produced on an elm tree each year? Do growth...

Lightning

Lightning: Fact or Fiction?

Are skyscrapers safe from lightning strikes? Do ice crystals...

Ice cubes on white background. (frozen; freeze; ice cube)

Ice, Water, Vapor: Fact or Fiction?

Does water contract when it freezes? Is water the most common...

Occluded mesocyclone tornado. Occluded means old circulation on a storm; this tornado was forming while the new circulation was beginning to form the tornadoes which preceeded the F5 Oklahoma City tornado.

Natural Disasters: Fact or Fiction?

Is an F1 tornado the most powerful? Is a typhoon a kind of cyclone?...

Neptune. Uranus. Illustration of Neptune and Uranus eighth and seventh planets from the Sun in outer space. Solar System

Solar System Planets: Fact or Fiction?

Is Uranus blue-green because it has oceans? What created Neptune’s...

sun. Setting of the sun with evening light in the evening sky over water. Sunrise, sunset, star, orange, ocean, sea

Fire in the Sky: Fact or Fiction?

This massive sphere of gas lights our way and provides our energy,...

Party balloons on white background. (balloon)

Helium: Fact or Fiction?

This colourless gas loves colourful balloons, but what else do...

rose. A red rose flower grows in a field. National flower of the United States. smell, fragrance

Flowers: Fact or Fiction?

If roses are red and violets are blue, then this quiz is a multi-colored...

horse. Grazing brown horse with a white stripe down the nose called a blaze. mammal, animal

Mammals: Fact or Fiction?

Was the first cloned mammal a horse? Are marsupials mammals?...

Halley's Comet, 1986. Halleys Comet, also called Comet Halley. Named after English astronomer Edmond Halley.

Objects in Space: Fact or Fiction?

What are asteroids largely composed of? Where are comets formed?...

Venus flytraps (carnivorous plant; tropical plant; species Dionaea muscipula)

Plants: Fact or Fiction?

Can carnivorous plants eat humans? How big is the largest aquatic...

A sample from an 2.7 billion years old banded iron-formation (BIF Rock) in the Temagami greenstone belt in Ontario, Canada.

Rocks: Fact or Fiction?

What is the age of the oldest rocks on earth? Are rocks and minerals...

Minnesota Mining & Manufacturing Company (3M Company). Wall covered in colourful post-it notes invented by 3M's Art Fry, A deliberate invention, yellow color accidental. Reminder, Post it note, Sticky Note, Adhesive Note, Note pad, Note paper

Inventions and Inventors: Fact or Fiction?

Was rayon the first synthetic fiber? Were Post-it notes a deliberate...

Close-up of a young female student (middle school, junior high school, laboratory) adding liquid with a dropper to a beaker of blue fluid (safety glasses).

Scientists and Inventors: Fact or Fiction?

Did famed mathematician Blaise Pascal invent an adding machine?...

hearing. headphone. earphone. iPod. Close-up of human ear with earbud in human head listening to mobile phone or music. Audio equipment communication, ear bud headphones, earbuds, noise sound ear canal.

Sound: Fact or Fiction?

Is the speed of sound constant? Does the way we pronounce words...

Archaea at Midway Geyser Basin in the Grand Prismatic Spring, Yellowstone National Park, Wyoming. Largest hot spring in Yellowstone, third largest in the world. Temp. 147-188F Dim. 250x380 ft. Archaeon, archeon, Yellowstone Geysers, algae

Earth Sciences: Fact or Fiction?

Did life begin on Earth soon after the planet was formed? How...

Full moon (lunar moon; light reflection)

Small Step, Giant Leap: Fact or Fiction?

Is the Moon the only object in the solar system to have craters?...

Telescope pointing towards stars at night. (stargazing, nighttime, dusk)

Telescopes: Fact or Fiction?

Was Pluto the first planet to be discovered by telescope? Can...

The Sagittarius Star Cloud: A Sky Full of Glittering Jewels; NASA's Hubble Space Telescope has given us a keyhole view towards the heart of our Milky Way Galaxy, where a dazzling array of stars reside. Most of the view of our galaxy is obscured by dust. H

Stars: Fact or Fiction?

You are probably familiar with stars such as Marilyn Monroe and...

The sun in the sky.

Our Sun: Fact or Fiction?

How does the Sun affect the Earth’s seasons? When will the Sun...

Tethys (above) and Dione, two satellites of Saturn, as observed by the Voyager 1 spacecraft. The shadow of Tethys is visible on the planet's "surface," just below the rings (bottom right). (solar system, planets)

Planets: Fact or Fiction?

From which Roman god does Saturn get its name? What makes Venus...

Able (pictured here) an American-born rhesus monkey and Baker a South American squirrel monkey were launched in the nose cone of an Army Jupiter Missile May 28, 1959. Both were recovered unharmed. Baker lived to age 27, Able died June 1, 1959. NASA.

Space Navigation: Fact or Fiction?

Was a monkey the first animal in orbit? Was international spying...

KC-135 Stratotanker refueling U.S. Airforce military F-16 Falcon. Transportation aircraft refueled in mid-air aka aerial refueling.

Aircraft: Fact or Fiction?

Is the airline industry the world’s largest consumer of oil?...

Major features of the ocean basins. World terrain map.

Earth: Fact or Fiction?

How many major oceans does Earth have? Does land cover 50 percent...

Water droplets on flat surface.

Water: Fact or Fiction?

Is rainwater the purest form of water? Is fresh water more acidic...

The word spring can be used for any elastic object that stores energy, such as a rubber band. Human hand aims red rubberband ready to shoot. Aiming, stored engergy

Energy and Fossil Fuels: Fact or Fiction?

When stretched, what type of energy does a rubber band store?...

Part of the laser system developed for the measurement of the proton radius. equency doubling optics converting the disk laser pulses from 1030 nm (infrared) to 515 nm (green) by means of LBO crystals.

Light: Fact or Fiction?

Does a laser amplify light? Can light therapy help people battle...

Water-ice clouds, polar ice, polar regions and geological features can be seen in this full-disk image of Mars.

Mars: Fact or Fiction?

From where does Mars get its name? Does the "Red Planet" experience...

ten types of clouds and their elevation: cirrus, cirrocumulus, cirrostratus, altocumulus, altostratus, nimbostratus, stratocumulus, stratus, cumulus, cumulonimbus

Earth’s Atmosphere and Clouds

You may have heard of the car model, but is "stratus" a type...

Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.

All About Astronomy

What astronomer suggested that the Sun was at the center of the...

1 July 2002: The Solar and Heliospheric Observatory (SOHO) satellite reveals a massive solar eruption more than 30 times the Earth's diameter. The eruption formed when a loop of a magnetic field over the surface of the Sun trapped hot gas.

Brightest Star in the Solar System

This giant ball of energy regulates our perspective of time,...

Nuclear powered aircraft carrier USS Carl vinson plows through the Indian ocean as aircraft on its flight deck are prepared for flight operations 3/15/05.

Ships and Underwater Exploration

What is the largest type of military ship? What is the name of...

Sextant. Celestial navigation at sea. Sailor using sextant. Travel and navigation.

Travel and Navigation

You may be familiar with voice-activated GPS gadgets, but what...

Venus's-flytrap. Venus's-flytrap (Dionaea muscipula) one of the best known of the meat-eating plants. Carnivorous plant, Venus flytrap, Venus fly trap

Plants: From Cute to Carnivorous

You may know that rice is the seed of a plant, but what is the...

Oscilloscope displays, oscillating electric current, wave patterns, radio waves, electronics

Sound Waves Calling

What is pitch? What is the name for a speed greater than that...

Metal and enamel pan of boiling water on stove. (boiling point; cooking; steam; cooking gas; non-electric)

Aitch-Two-Oh?

What was steam power developed to do? How much of the Earth’s...

Field of baobab trees, Madagascar. (bottle tree)

Trees of the World

What is frankincense? What is a deciduous tree? Plant your roots...

White semi truck on the Highway. Truck, lorry, motor vehicle to carry freight or goods or perform special services. Cab, carrier, semis trucks.

Machinery and Manufacturing

From drilling holes and moving freight to car engines and their...

battery. Illustration of battery connected to lightbulb. Power a light bulb with a battery. Battery, Power Supply, Science, Circuit, Currents

Electricity: Short Circuits & Direct Currents

What’s the difference between an electrical conductor and an...

Saturn. Saturn and its rings. Second largest planet of the solar system. Space Art

Planets and the Earth’s Moon

What’s the relationship between distant planets and supposed...

barometer. Antique Barometer with readout. Technology measurement, mathematics, measure atmospheric pressure

Fun Facts of Measurement & Math

What does a barometer measure? During which year do humans grow...

Italian-born physicist Dr. Enrico Fermi draws a diagram at a blackboard with mathematical equations. circa 1950.

Physics and Natural Law

What force slows motion? For every action there is an equal and...

cigar. cigars. Hand-rolled cigars. Cigar manufacturing. Tobacco roller. Tobacco leaves, Tobacco leaf

Building Blocks of Everyday Objects

What are cigars made of? What material is glass classified as?...

Rafflesiaceae. rafflesia. Rafflesia arnoldii, Malpighiales order, on the Island of Borneo. largest known flower in the world grows to aprox. 3 feet. Also known as the monster flower. Exudes a decaying flesh odor that attracts carrion flies.

Flowers: Nature’s Color Palette

You may know that honey is produced from the nectar of flowers,...

NASA's Reduced Gravity Program provides the unique weightless or zero-G environment of space flight for testing and training of human and hardware reactions. NASA used the turbojet KC-135A to run these parabolic flights from 1963 to 2004.

Man-Made Birds in the Sky

From zeppelins to jet-powered propellers, launch into this quiz...

rain. Child in the rain, wearing a rain coat, under a yellow umbrella. April Showers weather climate rain storm water drops

April Showers to March’s Lions and Lambs

What is the hottest recorded temperature on Earth? What’s the...

Equations written on blackboard

Numbers and Mathematics

A-B-C, 1-2-3… If you consider that counting numbers is like reciting...

Basalt sample returned by Apollo 15, from near a long sinous lunar valley called Hadley Rille. Measured at 3.3 years old.

(Bed) Rocks and (Flint) Stones

Diamonds may be a girl’s best friend, but what is that mineral’s...

Electric power lines against sunset (grid, power, wires, electrical, electricity)

Energy & Fossil Fuels

From fossil fuels and solar power to Thomas Edison and Nicola...

water glass on white background. (drink; clear; clean water; liquid)

Water and its Varying Forms

Even though water exists in three states, there is only one correct...

Ursa major constellation illustration art. (Big Dipper) stars, space, night sky)

Stars: Explosions in Space

What’s your horoscope? Have you ever seen a shooting star? From...

Spreading oak tree in summer. (green, leaves, deciduous, shade)

Trees: Giants Holding the Sky

Trees produce oxygen, provide habitats for insects, and one held...

The orbits of the planets and other elements of the solar system, including asteroids, Kuiper belt, Oort cloud, comet

Space Odyssey

"Far out". "Spacely". "Out-of-this-world". You may have heard...

Cross section of Earth showing the core, mantle, and crust

Everything Earth

If earth is mankind’s first frontier, how will you score on this...

Michael Faraday (L) English physicist and chemist (electromagnetism) and John Frederic Daniell (R) British chemist and meteorologist who invented the Daniell cell.

Faces of Science

Galileo Galilei. Anders Celsius. You may recognize their names,...

Solar eclipse, 2008.

Space: Fact or Fiction?

Mars and the Milky Way are more than just candy bars! See how...

Magnified phytoplankton (pleurosigma angulatum) seen through a microscope, a favorite object for testing the high powers of microscopes. Photomicroscopy. Hompepage blog 2009, history and society, science and technology, explore discovery

Science: Fact or Fiction?

Do you get fired up about physics? Giddy about geology? Sort...

Group of elephant in Africa. Elephants in Africa. Hompepage blog 2009, history and society, geography and travel, explore discovery

Animals: Fact or Fiction?

Curiosity may have killed the cat, but kinkajous, bluebacks,...

Panda bear, daytime, tree, eating, feeding, sitting, nature, giant panda, wildlife, bamboo, Asian, chewing, mammal, daylight, day, Ailuropoda melanoleuca, outdoors, habitat, outside, animal.

Mammalian Matters: Fact or Fiction?

Will big horns sink a water buffalo? Is the vampire bat’s thirst...

Green tree python snake (Chondropython viridis) in a rainforest.

Creepy Crawlers Quiz

Got bugs on the brain? A passion for pests? Test how much you...

Adult and baby orangutans (Pongo pygmaeus) - (note: probably taken in a zoo).

Mammals Quiz

Horses and Hyracotherium and yaks, oh my! Test your...

Garden spider web with captured prey.

Insects & Spiders: Fact or Fiction?

Insects and spiders are fascinating, from delicate butterflies...

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