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| forces that destroy or break land |
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| forces that help build land |
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| huge land mass that existed 225 million years ago and that broke to form today's continents |
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| the theory that explains the Earth's surface is broken into plates that move. |
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| large section of Earth's surface made of the crust and the rigid, top part of the mantle |
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| crust under the continents |
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| the place where two plates meet |
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| a place where two crustal plates are moving towards each other |
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| a place where two crustal plates are moving away each other |
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| a place where two crustal plates slide past each other |
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| mountain formed from past eruptions; an opening in the Earth's crust through which lava erupts (comes out) |
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| a sudden movement of the ground that happens when part of Earth's crust suddenly shifts |
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| the innermost layer of Earth |
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| the partly molten layer inside the Earth between the crust and the outer core |
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| outer-most, rocky layer of Earth |
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| Mountains, islands, canyons, beaches, valleys, rivers, volcanoes, glaciers, oceans |
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