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13 Cards in this Set
- Front
- Back
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Crust |
Outer layer of the earth
3-5 miles thin on oceanic crust (made of basalt) 25 miles thick on continental crust (made of granite) |
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Mantle
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Largest layer of the earth. 1800 miles thick. 5100-3300°F. Contains magma. Upper part is the lithosphere. Middle part is asthenosphere.
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Lithosphere
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the crust and the uppermost layer of the mantle together that makes up a zone of rigid brittle rock. It is broken up into tectonic platev
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Asthenosphere
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upper mantle thah flows like hot asphalt
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Convection Currents |
Hot mantle rises from most inner most part of the mantle, cools and falls. allows crust to move |
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Outer core
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1400 miles thick, its so hot that metal is in its liquid state. composed of mainly nickle and iron |
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The Inner Core |
about 700 miles thick. Temperature and pressure is so high that metals are squeezed together and are not able to move at a liquid state but are forced to vibrate in a solid. |
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Density of minerals |
greatest in the core and decreases towards the surface |
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Gravitational force |
strongest at the center, decreasing towards the center |
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temperature and pressure |
decreases from the center to the periphery |
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Mineral |
naturally occuring inorganic substance, crystalline in nature, there are metallic and non metaalic minerals |
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Rock cycle |
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Rock |
an aggregate of mineral particals but may also contain organic materials. |
