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rocks
3 differant types of rocks
| Term | Definition |
|---|---|
| erosion | prosses where wind water ice or gravity moves sediment |
| weathering | proccess that breaks down sediment |
| deposition | proccess where sediment drops |
| composition | what a rock is made of |
| coarse-grained | crystals are larger than sand |
| fine-grained | crystals are too small to be seen without a microscope |
| magma | molten rock underground |
| magma cooled slowly | cooling rate of fine grained igneous rock |
| cooling rate of fine grained igneous rock | lava cooled quickly |
| lava | molten rock at the surface of the earth |
| 2 types of igneous rocks | intrusive extrusive |
| intrusive | type of igneous rock that forms undergrouned |
| extrusive | type of igneous rock that forms from lava |
| 3 types of sedimentary rocks | clastic organic chemical |
| organic sedimentary | limestone with shells |
| clastic | type of sedimentary rock that forms when sediment is glued together |
| 2 forces that create sedimentary rock | compaction (pressure) and cementation (gluing) |
| 2 types of metamorphic rock | foliated and nonfoliated |
| foliated | Gneiss is a metamorphic rock with stripes (from pressure). What type of metamorphic rock is gneiss? |
| What forces can cause metamorphic rock to be created? | heat, pressure |
| A rock is a mixture of ______________ (and sometimes organic material). | minerals |
| Where is sedimentary rock formed (what conditions)? | underwater |
| Where is metamorphic rock formed (what conditions) | 1. near magma/lava 2. deep underground 3. where 2 plates collide (mountain building) |
| List the 3 main types of rock | igneous, metamorphic, sedimentary |
| List a few examples of sediment. | gravel, sand, clay, pieces of shells |
| ______________ is when sediments are pressed/compressed down because of pressure | compaction |
| _______________ is when sediments are naturally glued together | cementation |
| continuous process in which new rock is made from old rock | rock cycle |
| ______________ is the extrusive igneous rock that makes up the ocean floor | basalt |
| __________ is the intrusive igneous rock that makes up the continents and mountains | granite |
| marble is a ___________ metamorphic rock because it does not have any stripes/bands | nonfoliated |