| A | B |
|---|
| cementation | when sediments get "glued" together |
| compaction | when sediments are pressed together |
| cleavage | breaking along flat surfaces |
| crystals | the shapes of minerals that grow! |
| density | heaviness compared to size |
| fracture | breaking along curved or uneven surfaces |
| hardness | the ability of one mineral to scratch another |
| igneous rock | forms from melted rock that cools and hardens |
| luster or lustre | shine; the way a mineral reflects light |
| metamorphic rock | rock that forms or changes due to heat and pressure in the earth |
| Mohs' scale | rating of hardness (1-10) |
| rock cycle | this shows how rocks change |
| sedimentary rock | rock that forms in layers |
| sediments | tiny pieces that are worn or washed away |
| streak test | line left on unglazed tile |
| weathering | the wearing away of a rock by the forces of nature |
