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Rock Unit
vocabulary rock and minerals
Question | Answer |
---|---|
Geologist | scientist who study rocks and minerals to help us learn about the formation of the earth |
Granite | rock composed of minerals - Igneous rock |
Hardness | how resistant a mineral is to being scratched |
Igneous rocks | formed from minerals that have melted deep within the Earth - "fire made" formed from melted rock materials |
Luster | the way a mineral reflects the light |
Metamorphic rocks | formed from igeneous, sedimentary, or other metamorphic rocks which contain materials that have been changed by heat, pressure, or chemical recation. |
Mineral | minerals are naturally occuring substances. Each mineral has its own chemical composition. Minerals are inorganic (not alive)substances. Always solid. |
Rock | earth materials made up of different kinds of materials |
Rock cycle | a never ending process by which rocks are changed from one type to another |
Scratch test | used to determined the hardness of a material |
Sedimentary rocks | formed as particles settle to the bottom of the ocean and lakes. Smaller bits of rocks pressed or cemented together. Form layers. |