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6-3 ROCKS!!!!!!!!!
Its time to ROCK and roll! :D
| Question | Answer |
|---|---|
| Igneous rock | A type of rock that is formed when magma cools and hardens |
| Most igneous rocks are | crystalline |
| Magma | Molten rock BELOW the surface |
| Lava | Molten rock ABOVE the surface |
| Crystalline | Full of crystals |
| Extrusive | Rocks formed on the surface |
| Intrusive | Rocks formed below the surface; larger crystals |
| Coarse- grained | Rocks with large mineral grains such as Granite. |
| Fine- grained | Rocks with small mineral grain such as rhyolite |
| Glassy | Rock glass formed from molten rock, Ex: Obsidien |
| Vesicular | Igneous rock with lots of holes formed from bubbling gas |
| Felsic | Forms from magma with high concentration of silica. (Ex. granite) |
| Mafic | Forms from magma with high concentration of iron and magnesium (Ex. basalt) |
| Porphyritic | Rock with a mix of large and small crystals; granite is an example |
| Compaction | the process where sediments are squeezed together which makes the pore space shrink |
| Cementation | When sediments are glued together by minerals deposited by water |
| Chemical Sedimentary Rock | form when ions from dissolved minerals precipitate because of changing in the concentration of chemicals |
| Physical Sedimentary Rock | Rocks that form from the remnants of living things. Ex. coal or limestone |
| Clastic sedimentary rock | When rock fragments carried by the elements cement together to form rocks |
| Sorting | The tendency of water and air able to flow through the rock |
| Angularity | How jagged the rock fragments are in a sedimentary rock |
| Stratification | Layers of sedimentary rock |
| Cross-bedding | rocks in slanted layers |
| Ripple marks | Caused by the elements |
| Mud cracks | When muddy deposits shrink and make cracks |
| Concretions | lumps of rock that are different from the "host" rock |