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Rocks Ch. 2 vocab
Question | Answer |
---|---|
Igneous Rock | When hot magma cools and hardens |
Lava | When magma reaches Earth's surface and flows from volcanoes |
Intrusive | Rocks that form from magma below the surface |
Extrusive | Rocks formed as lava cools on the surface of Earth |
Basaltic | Igneous rocks are dense, dark colored rocks |
Granitic | Igneous rocks are light colored rocks of a lower density than basaltic rocks |
Sediment | Loose materials such as rock fragments, mineral grains, and bits of shell that have been moved by wind, water, ice, or gravity. |
Sedimentary rock | Sediments that are pressed and cemented together, or when minerals form from solutions |
Compaction | Process that forms sedimentary rock when layers of sediments are compressed by the weight of the layers above them |
Cementation | Sedimentary rock-forming process in which sediment grains are held together by natural cements that are produced when water moves through rock and soil |