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| Layer beneath the crust; largest layer of the Earth that contains pockets of magma. |
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| Layer beneath the mantle where liquid nickel and iron are found. |
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| Center of the Earth; made of solid iron and nickel. |
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| Theory related to the movement of continental and oceanic plates in the Earth's crust. |
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| Cracked boundaries or edges of tectonic plates. |
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| Area where tectonic plates push together to form mountains or are pushed downward to form trenches. |
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| Area where tectonic plates pull apart. Mid-ocean ridges are formed this way. |
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| Transform (also known as strike-slip or sliding) boundary |
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| Area where tectonic plates slide past each other horizontally. Earthquakes are caused by these boundaries. |
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| The continuous cycle of rocks from one type to another over time. |
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| Liquid rock under the Earth |
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| Liquid rock on the Earth's surface |
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| Rock formed from cooled and hardened magma |
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| Rock formed from cemented sediment that has been deposited over time |
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| Rock formed from extreme heat and pressure within the Earth's surface. |
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| Breaking down of rock material on the Earth's surface |
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| Carrying away of broken down (weathered) rock material by wind or water on the Earth's surface |
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| Remains of ancient plants and animals that have been preserved in rock. |
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