| A | B |
|---|
| magma | hot liquid rock beneath the earth's surface |
| mineral | naturally occuring substance formed in the earth |
| crystal | substance that makes up minerals |
| cleavage | breaking of mineral along smooth, definite surfaces |
| inorganic | composed of material that is not and never was living |
| hardness | ability of a mineral to resist being scratched |
| rock | substance that is made up of 2 or more minerals |
| streak | color of the powder left behind when a mineral is rubbed against a hard rough surface |
| humus | top layer of a soil profile rich in nutrients |
| igneous rock | rock formed by the cooling and hardening of magma |
| sediment | small pieces of rock, shells, or remains of plants and animals that have been carried along and deposited by wind, water and ice. |
| sedimentary rock | rocks fromed from sediments that have been pressed and cemented into rock |
| metamorphic rock | rock formed when sedimentary or igneous rocks are changed due to heat, pressure, or chemical reactons. |
