| A | B |
|---|
| core | Earth's center |
| crust | Thin outer layer of Earth's surface |
| erosion | Wearing away of rock or soil by water, wind or ice. |
| igneous rock | rock formed by the hardening of magma. |
| magma | Melted, liquid rock beneath Earth's suface. |
| mantle | Semi-solide layer of Earth between the crust and the core. |
| metamorphic rock | Rock formed when exposing igneous or sedimentary rock to exteme heat and pressure. |
| mineral | Solid, natural material that doesn't come from a plant or animal. |
| sedimentary rock | Rock formed when sediment is compacted. |
| weathering | Process of wearing away or otherwise changing Earth's surface by exposures to natural forces. |
| rock cycle | Series of changes that rock undergoes as it cycles between different forms. |
| plates | Large sheets of rock that make up Earth's crust. |
