| A | B |
|---|
| rocks | made of one or more minerals |
| minerals | different kinds of crystals |
| hardness | Mohs scale (example quartz 7) |
| talc | soft mineral |
| weathering | natural process breaks rocks into smaller pieces |
| soil | small bits of rock, plant and animal remains and live animals |
| sedimentary rock | layer |
| fossils | bones and leaves |
| obsidian | igneous rock cooled quickly |
| igneous rock | made from melted rock that cooled |
| metamorphic rock | change form from heat and pressure |
