| A | B |
|---|
| solid materials of Earth's crust | minerals |
| like all matter, minerals are made of | elements |
| two or more compounds joined together | compounds |
| minerals from geometric shapes | crystals |
| observe this on surface | color |
| way light bounces off | luster |
| color of the powder left when a mineral is rubbed | streak |
| mineral resists scratching | hardness |
| mineral breaks along flat surfaces | cleavage |
| minerals do not break smoothly | fracture |
