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Definition
| Where a continental crust plate is going below another continental crust plate. |
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| A circular "ring" around the Pacific Ocean that spreads from the west coast of North America to Japan and other areas where there is an abundance of volcanic activity. This is due to convergent boundaries near the circle. |
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Definition
| where two continental plates on the earth's crust are moving away from each other. An example of this is the Mid-Atlantic Ridge. |
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Definition
| The most inner layer of earth. This layer is so compact that it has turned to solid. |
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Definition
| One of the layers of the earth. This layer covers the inner core. |
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Definition
| One of the layers of the earth, just below the crust, which contains magma. |
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Term
| Mohorovicic Discontinuity ( or Moho ) |
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Definition
| The boundary between the crust and the mantle. |
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Definition
| The most outer layer of the earth, we live on it. |
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Definition
| the molten rock below the surface. |
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Definition
| The molten rock that has erupted through a volcano. ( which means it is no longer inside the earth ) |
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Definition
| Rocks that form from the hardening of magma or lava. Common types of this rock are granite, basalt, pumice, and obsidian. |
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Definition
| Very small grains of rock, sand, or even seashells. |
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Definition
| Rocks that are formed by sediments pushing together and creating a rock. Common types of this rock are sandstone, shale, and limestone. |
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Definition
| Rocks that are formed by extreme heat and extreme pressure. Common types of this rock are slate, schist, and marble. |
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Definition
| The process of breaking down a rock. |
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Definition
| The process of a rock (or rocks) moving to another place. |
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Definition
| Weathering that breaks down a rock by wind, water, or gravity. |
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Definition
| Weathering that breaks down a rock by changing the rock's chemical make-up. |
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Definition
| A row of trees planted to block winds from sweeping away fertile soil. |
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Definition
| The wearing away of rock that is exposed to Earth's atmosphere |
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Definition
| Carving flat terraces on steep hills so that water does not erode land on the terraces. |
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Definition
| Bits of sand, dust, and mud that sink to the bottom of a body of water. |
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Definition
| Substance that was originally part of a living thing. |
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Definition
| A two dimensional map that shows elevations. |
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Definition
| One of the three layers of mature soil. |
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Definition
| The natural moving of material from one place to another. |
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Definition
| The building up of land by erosion. |
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Definition
| Lines on a relief map that show equal elevations. |
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Definition
| The breaking down of rock into new materials. |
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