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Science 2
Question | Answer |
---|---|
Rock | Mixture of such minerals,rock fragments, volcanic glass,organic matter,or other natural materials |
Rock cycle | illustrates the process that creates and changes rocks |
Igneous rock | magma cooled and hardened |
lava | When magma reaches earth's surface |
Extrusive | Lava cools on the surface of earth |
Basaltic | dense, dark colored igneous rocks that dorm from mama rich in iron and magnesium |
Granite | Light colored rocks of a lower density than basaltic rocks |
Metamorphic rocks | Rocks that have changed because of changes in the temperature and pressure or the presence of hot, watery fluids |
Foilated | When mineral grains line up in parallel layers |
Nonfoilated | Metamorphic rocks with no layers |
Sediment | Loose materials such as rock fragments, mineral grains,and bits of shells |
Sedimentary rocks | Forms when sediments are pressed and cemented together |
Compaction | When small sediments push up against each other and dorm solid rock |
Cementation | When large sediments stick together because of weathering |
3 types of rocks | Igneous, sedimentary,metamorphic |
Source of igneous rocks | Magma |
Magma | molten material below the earth's surface |
Intrusive | Cooling of magma to form mineral grains that grow together to form solid rock below the earth's surface |
Common intrusive igneous rocks | Gabbro,diorite,granite |
Andesite | Higher density than granitic rocks but lower density than basaltic rocks |
Weathering | The physical or chemical breakdown of existing rock |