| A | B |
|---|
| mineral | a non-living solid found in nature |
| rocks | made of one or more minerals |
| mantle | the middle layer of the Earth |
| crust | the solid outside layer of Earth |
| core | the center of the Earth |
| magma | liquid rock |
| igneous rocks | rock that was once melted but has cooled and hardened |
| sedimentary rock | rocks that form from layers of sediments. |
| metamorphic rock | igneous or sedimentary rock that has been changed by heat and pressure |
| rock cycle | the process of rocks changing into different types |
| fossil | something that has lasted from a long time ago |
| mold | the shape of a plant or animal left in sediment |
| cast | when mud or minerals fill a mold |
