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Rocks

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Transcript

  • 1. Rocks Igneous, Sedimentary and Metamorphic
  • 2. What is a Rock?  The material that forms Earth’s hard surface (crust)
  • 3. Essential Questions  How are rocks and minerals different?  Rocks can be made from various minerals and other materials, while minerals must have a definite composition.  What are the three types of rocks?  Igneous - sedimentary - metamorphic  How are rocks formed?  Rocks are made from mixtures of minerals and other materials.
  • 4. Sedimentary Rock  Definition  A type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together.
  • 5. Sedimentary Rocks  FACTS  Fours steps to be formed  Erosion  Deposition  Compaction  Cementation  Examples:  Limestone, sandstone, shale
  • 6. Igneous Rocks  Definition  A type of rock that forms from the cooling of molten rock at or below Earth’s surface ~ “ignis” means fire in Latin
  • 7. Igneous Rocks  Facts  Can be “intrusive”  forms Inside earth’s interior  Can be “extrusive”  forms on top of earth’s surface (Exterior)  Forms from cooled magma or lava  Examples  Granite, basalt, pumice
  • 8. Metamorphic Rock  Definition  A type of rock that forms from an existing rock that is changed by heat, pressure or chemical reactions
  • 9. Metamorphic Rock  Facts  Form deep below earth’s surface  Any type of rock can eventually “morph” into a metamorphic rock  Examples  Marble, slate