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| the outer layer of the earth, which is made up of rock |
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| the thickest layer of the earth, which is made up of rock |
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| layer of the earth, which is made up of molted (liquid) iron and nickel |
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| center of the earth, which is shaped like a ball and is made up of solid iron and nickel |
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| forces that build the earth |
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| forces that destroy the earth |
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| the single land mass that is believed to have split apart 200 million years ago to form the present continents |
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| a large section of the earth's crust |
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| a mountain that is formed when lava, ash, and cinder pour out of the opening in the ground |
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| a huge sheet of slow, moving ice |
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| the breaking an wearing away of old rock |
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| takes place when rock and soil is carried away to another place |
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Definition
| any sudden movement or shaking of the earth |
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Definition
| a crack in the earth's crust where earthquakes occur |
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| a machine used to measure the movement of the earth's crust during an earthquake |
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| hot, molted rock that pushes through a tunnel of a volcano from the center of the earth |
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Definition
| when magma reaches the earth's crust it becomes a very hot liquid that flows down the volcano |
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