| Question | Answer |
|---|---|
| Formed from liquid rock | Igneous Rock |
| Formed from Heat and Pressure | Metamorphic Rock |
| Formed from layers of sediment being pressed together | Sedimentary Rock |
| Hardness | is determined by observing the ease or difficulty which one mineral is scratched by another |
| luster | refers to how light is reflected from the surface of a mineral. The two main types are metallic and nonmetallic. |
| Cleavage | breaks into pieces with straight lines |
| Fracture | breaks with jagged edges |
| Streak | Color of crushed mineral powder. It may be different than color of the mineral. |
| physical weathering | breaking down of rock by wind, water, ice, temperature change, and plants |
| erosion | movement of rock by gravity, wind, water, and ice |
| magma | liquid rock inside the earth |
| lava | liquid rock that flows outside the earth |
| metamorphic | means changed |
| humus | decaying pieces of plants and animals |
| organic | meansfrom living things |
| inorganic | means from nonliving things |
| Rocks are made up of | one or more minerals |
