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The Rock Cycle
“Da Rock Cycle”
http://www.youtube.com/watch?v=w_FFBFcN7eY
Three Types of Rocks
Igneous Metamorphic Sedimentary
Igneous Rocks
Igneous rocks form when molten (Magma) rock cools and becomes solid.
Igneous rocks are divided into two groups, based on where the rock forms. Intrusive Igneous Rocks: Igneous rocks that form below
the Earth’s surface. They form when magma enters an underground chamber, cools very slowly, and forms rocks full of large crystals.
Extrusive Igneous Rocks: Igneous rocks that form above the Earth’s surface. These rocks, also called volcanic rocks, form when lava cools quickly at or above the Earth’s surface.
Sedimentary Rock
Formed from igneous rocks that are eroded by wind, water or ice
These sediments are carried into seas, after millions of years the weight of the sea and the sediments compressed into sedimentary rock
Metamorphic Rock
Metamorphic Rocks are formed when Sedimentary and Igneous rocks are exposed to heat and pressure
Metamorphism occurs when magma or liquids are forced into cracks of existing sedimentary and igneous rocks. The surrounding rocks are changed into metamorphic rocks