| A | B |
|---|
| Igneous rocks | are formed by volcanic lava that has cooled and hardened. |
| Sedimentary rocks | are formed by many layers of earth. |
| Metamorphic rocks | are formed by heat and pressure. |
| Plate tectonics | is the movement of the plates of the earth. |
| Weathering | is a natural wearing away of soil. |
| Erosion | is moving rock and soil to another place. |
| Earth's layers | are the crust, mantle, and core. |
| Earthquakes and volcanoes | cause changes from within the earth. |
| Fossils are | remains of dead plants and animals usually found on sedimentary rocks. |
| The rock cycle | is a never ending process of rocks being changed from one form to another. |
