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Rock Cycle

Rock Cycle. Miss Smith 8.3.4. Rock Classifications. Igneous Forms when molten rock (magma) cools and hardens If cooling takes place slowly beneath Earth’s surface, the igneous rock is called intrusive If cooling takes place rapidly on Earth’s surface, the igneous rock is called extrusive

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Rock Cycle

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  1. Rock Cycle Miss Smith 8.3.4

  2. Rock Classifications • Igneous • Forms when molten rock (magma) cools and hardens • If cooling takes place slowly beneath Earth’s surface, the igneous rock is called intrusive • If cooling takes place rapidly on Earth’s surface, the igneous rock is called extrusive • Metamorphic • Forms when rocks are changed into different kinds of rocks by great heat and/or pressure • They are heated, squeezed, folded, or chemically changed by contact with hot fluids.

  3. Rock Classifications • Sedimentary • Forms from the compaction and/or cementation of rock pieces, mineral grains, or shell fragments called sediments. • Sediments are formed through the processes of weathering and erosion of rocks exposed at Earth’s surface. • Sedimentary rocks can also form from the chemical depositing of materials that were once dissolved in water

  4. The Rock Cycle • http://www.minsocam.org/MSA/K12/K_12.html

  5. Can you… • Explain the interrelationships of the three rock types? • Interpret a rock cycle diagram? • Compare how rocks can be changed by particular processes? • Identify a rock type by the method which it is formed?

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