| A | B |
|---|
| sedimentary rock | formed by pressure |
| metamorphic rock | formed by heat and pressure |
| igneous rock | formed by heat |
| magma | molten rock inside the earth |
| lava | molten rock outside the earth |
| mineral | solid substance made of crystals |
| Moh's Scale | used to measure hardness |
| talc | softest mineral |
| diamond | hardest mineral |
| streak | color of powder left by mineral |
| luster | the way light bounces off a mineral |
| cleavage | how a mineral breaks |
| mass | measured with a scale |
| rock cycle | when rock changes from one type to another |
| weathering | breaking down rock into smaller pieces |
| erosion | movement of weathered rock |
| causes of weathering | water, wind, temperature, living things |
| causes of erosion | wind, glaciers, moving water |
| element | small particle that makes up minerals |
| rock | made from one or more minerals |
