| A | B |
|---|
| Crust | the outer layer of the earth |
| Mantle | the layer of rocklike material under the earth's crust |
| Core | the layer beneath the mantle, the hottest part of the earth |
| Volcano | an opening in the earth's crust through which melted rock flows |
| Lava | the melted rock that flows from a volcano |
| Magma | melted rock |
| Erosion | the movement of rock and soil by water and wind |
| Weathering | the wearing away and breaking of rock |
| Earthquake | the movement of rock in the earth's crust |
