| A | B |
|---|
| grain | The smallest piece of a mineral in a rock. |
| fossils | Often found in sedimentary rocks which enables scientists to learn about existing life in the past. |
| luster | This property defines whether a mineral is metallic or non-metalic. |
| lava | Melted rock material that reaches the earth's surface before it hardens and cools. |
| rocks | Solid material made from minerals that form the earth's crust. |
| The Rock Cycle | The name given to the transformation from one type of rock to another type of rock. |
| sediment | Bits of weathered rocks and minerals, pieces of dead plants and animals, sand and silt. |
| properties | The characteristics we observe or test which will help us tell one sample from another. |
| magma | Molten rock that cools and hardens before reaching the earth's surface. |
| crystals | These form when magma or lava cools and hardens. |
| sedimentary rocks | Rocks formed from sediment. |
| igneous rocks | A rock formed from magma that has cooled and hardened. |
| metamorphic rocks | New rock formed from existing rock that is changed by heat and pressure inside the earth. |
| minerals | Any inorganic matter of definite composition that is formed in the ground. |
| streak test | Used to test a mineral's hardness. |
| erosion | The loss of soil due to wind or as a result of washing away by water. |
