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| the outermost layer of the earth. It is rigid and very thin. |
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| The crust that is located above the ocean level. Land. |
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| The crust that makes up the ocean floor. |
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| a dense, hot layer of semi-solid rock approximately 2,900km thick. |
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| composition is metallic (iron-nickel alloy) rather than stony. The core is made up of two parts, a thick liquid center and a thick solid inner core. |
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| brittle uppermost shell of the earth, broken into a number of tectonic plates. The lithosphere consists of the heavy oceanic and lighter continental crusts, and the uppermost portion of the mantle |
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| region in the upper mantle of the earth's interior, characterized by low-density, semi plastic (or partially molten) rock material. |
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| A massive, irregularly shaped slab of solid rock usually composed of both continental and oceanic crust. |
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| molten (liquid) rock found within the mantle. |
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| plate boundaries that are moving away from each other. |
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| plate boundaries that are moving toward each other. |
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| plate boundaries that are moving beside each other in opposite directions. |
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| A break in the crust, where slabs of crust slip past each other. |
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| A force that acts on rock to change its shape or volume. |
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| stress that pushes a mass of rock in two opposite directions. |
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| Tension a stress that pulls on the crust, stretching rock so that it becomes thinner. |
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| a stress that squeezes rock until it folds or breaks. |
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