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How Rocks Form - PowerPoint PPT Presentation


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How Rocks Form. Key Concept. Geologists classify rocks into three major groups: Igneous Rock Sedimentary Rock Metamorphic Rock. How Are Rocks Classified?. Igneous Rock- forms when magma or lava cools .

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key concept
Key Concept
  • Geologists classify rocks into three major groups:

Igneous Rock

Sedimentary Rock

Metamorphic Rock

how are rocks classified
How Are Rocks Classified?
  • Igneous Rock- forms when magma or lava cools.
  • Sedimentary Rock- forms when particles are pressed and stuck together.
  • Metamorphic Rock- forms when heat and pressure change any kind of rock.