| A | B |
|---|
| Rock | a mixture of minerals and other materials |
| Grains | Particles of minerals or other rocks. |
| Texture | the look and feel of the rock's surface. |
| Igneous | Rocks that form from the cooling of magma or lave. |
| Sedimentary | Rocks that form from particles of other rocks or the remain of plants and animals. |
| Metamorphic | Rocks that form when an existing rock is changed by heat, pressure, or chemical reactions. |
| Volcano | A rock factory. |
| Rock forming minerals | The 20 minerals that make up most of earth's crust. |
| Crystal | Tiny particles that reflect light. |
