Term
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Definition
Chemical compounds of one or more elements bonded together.
inorganic, naturally occuring, solid, definate chemical composition, orderly arrangement of atoms. |
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Term
| What is most abundant in the earths crust? |
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Definition
Silicate Matierials.
75% of the earths crust! |
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Term
ROCK CYCLE
What drives the rock cycle? |
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Definition
internal heat engine: Heat that is produced inside the earth from radioactive decay. Drives plate techtonics.
External Heat Engine: The sun, drives evaporation & precipitation |
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Term
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Definition
* Dissolves Rocks
* Water freezes and expands, breaking rocks.
* Transports sediments (pieces of rocks and minerals through rivers, lakes.
* Diposits sediment
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Term
| How do Igneous rocks form? |
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Definition
* They form from cooling/solidifying molten rock.
* As molten rock cools, minerals form. |
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Term
| How do we classify igneous rocks? |
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Definition
*grainsize (size of minerals)
*composition (mineral content) |
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Term
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Definition
Controlled by the rate of cooling.
*formed when magma cools at the earths surface
*extrusive rocks (meaning out)
SLOW COOLING ROCKS = course grained min. (visable, big enough to see)
*formed when magma cools inside the earths surface.
*intrusive rocks |
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Term
| Composition :mineral content. (igneous) |
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Definition
FELSIC = Lite color, rich Si, low Fe & Mg.
INTERMEDIATE= Grey or Salt & Pepper.
MAFIC= Dark color, rich Fe & Mg, Low Si |
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