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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 |