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Rocks and Minerals
Vocabulary
| Term | Definition |
|---|---|
| mineral | an object that is solid, formed by nature, and has never been alive |
| rock | a solid made of minerals |
| crust | the solid outside layer of the Earth |
| mantle | the middle layer of the Earth |
| core | the center of the Earth |
| igneous rock | a rock that was once melted rock, but has cooled and hardened |
| sedimentary rock | a rock formed from material that has settled into layers and has been squeezed until it hardens into rock |
| metamorphic rock | a rock that has been changed by heat and pressure |
| rock cycle | the process in which one type of rock changes into another type of rock |
| fossil | something that has lasted from a living thing that died long ago |
| luster | the way a mineral shines or reflects light |
| geologist | a scientist who studies the Earth and its rocks |
| hardness | a measure of how easily a mineral can be scratched |
| streak | the color that a mineral leaves behind when it is scratched |
| cleavage | if a mineral breaks evenly along a smooth line, it has cleavage |
| magma | liquid rock |
| metallic mineral | a mineral that is shiny like metal |
| nonmetallic mineral | a mineral that is dull or glassy looking |
Created by:
Mrs. Durden
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