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rock size
Learn how igneous, sedimentary, and metamorphic rock become one another in the rock cycle
rock cycle rock textures rock textural terms rock sorting dry bulk densities deformation and confining pressure stress-strain curves general magnetic hysteresis curve
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Slate, a metamorphic rock, showing typical splintery fracture and thin layering (slightly larger than life-size).
rock summary
Quizzes
Cross section of Earth showing the core, mantle, and crust
Everything Earth
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
ore. iron ore minerals, rock, metal, metallic iron
Rocks, Minerals, and More Quiz
Cross section of Earth showing the core, mantle, and crust
The Solid Earth Quiz
Encyclopaedia Britannica thistle graphic to be used with a Mendel/Consumer quiz in place of a photograph.
27 True-or-False Questions from Britannica’s Most Difficult Science Quizzes
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Eid al-Fitr
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Vietnam War. U.S. President Lyndon B. Johnson awards the Distinguished Service Cross to First Lieutenant Marty A. Hammer, during a visit to military personnel, Cam Ranh Bay, South Vietnam, October 26, 1966. President Johnson
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The deformation of materials is characterized by stress-strain relations. For elastic-behaviour materials, the strain is proportional to the load (i.e., the applied stress). The strain is immediate with stress and is reversible (recoverable) up to the yield point stress, beyond which permanent strain results. For viscous material, there is laminar (slow, smooth, parallel) flow; one must exert a force to maintain motion because of internal frictional resistance to flow, called the viscosity. Viscosity varies with the applied stress, strain rate, and temperature. In plastic behaviour, the material strains continuously (but still has strength) after the yield point stress is reached; ...(100 of 7839 words)

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