| A | B |
|---|
| landform | The physical features on Earth's surface. |
| weathering | The process by which rocks are broken down into smaller pieces. |
| erosion | The process by which wind and moving water carry away bits of rock. |
| deposition | The process of dropping, or depositing, sediment in a new location. |
| mass movement | The downhill movement of rock and soil because of gravity. |
| crust | The thin, outer layer of Earth. |
| earthquake | A shaking of the ground caused by the sudden release of energy in Earth's crust. |
| fault | A break or place where pieces of Earth's crust move. |
| mantle | The layer of rock beneath Earth's crust. |
| core | The center of the Earth. |
| continental drift | A theory of how Earth's continents move over it's surface. |
| plate | A rigid block of crust and upper mantle rock. |
| Pangea | A supercontinent that existed about 225 million years ago containing all of Earth's land. |
| magma | A hot, soft rock from Earth's lower mantle. |
| fossil | The remains or traces of past life usually found in sedimentary rock. |
| volcano | A mountain formed by lava and ash. |
