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Mod-F 1.2 Rock Cycle
Term | Definition |
---|---|
rock cycle | Earth's rocks change from one type into another over time due to various Earth processes. |
igneous rock | formed when lava or magma cools and solidifies. |
lava | molten rock or magma that has reached the Earth's surface, rapid cooling, small crystals. |
magma | melted or molten rock material under the Earth's surface, cools slowly, larger crystals. |
metamorphic rock | formed deep underground where heat and pressure cause existing rocks to be changed |
heat and pressure | changing variables due to weight of overlying rocks, forming metamorphic rock. |
sedimentary rock | rocks form when particles of other rocks are deposited in layers and are compacted and cemented together. |
compaction | occurs when rock particles are pressed together or packed down by gravity and overlying rocks. |
cementation | occurs when compacted sediments stick together and turn into rock. |