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Earth’s Systems

Earth’s Systems . Layers, Rock cycle, Plate tectonics . Earth’s Layers. 4 layers 3 solid and 1 liquid Crust Mantle Outer Core Inner Core. Crust. Not a solid shell; it is broken up into huge, thick plates that drift atop the soft, underlying mantle. Mantle. Outer Core. Inner Core.

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Earth’s Systems

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  1. Earth’s Systems Layers, Rock cycle, Plate tectonics

  2. Earth’s Layers • 4 layers • 3 solid and 1 liquid Crust Mantle Outer Core Inner Core

  3. Crust Not a solid shell; it is broken up into huge, thick plates that drift atop the soft, underlying mantle.

  4. Mantle

  5. Outer Core

  6. Inner Core

  7. Other important info • Magma: molten beneath the earth’s surface • Lava: Magma on the surface • Magma is a mixture of many minerals

  8. Tectonic Plates

  9. Sea Floor Spreading • Mid Ocean Ridges – underwater mountain chains that run through the Earth’s Basins • Magma rises to the surface and solidifies and new crust forms • Older Crust is pushed farther away from the ridge

  10. Rocks • A rock is a naturally occurring solid mixture of one or more minerals, or organic matter • Rocks are classified by how they are formed, their composition, and texture • Rocks change over time through the rock cycle

  11. Igneous Rocks “Fire Rocks” Coarse-Grained Fine-Grained Felsic Granite Rhyolite Mafic Gabbro Basalt

  12. Sedimentary Rocks “Sandwich Rocks” • Sedimentary rock is formed by erosion • Sediments are moved from one place to another • Sediments are deposited in layers, with the older ones on the bottom • The layers become compacted and cemented together

  13. Metamorphic Rocks “Changing Rocks” • Meaning to change shape • Changes with temperature and pressure, but remains solid • Usually takes place deep in the Earth

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