Inside the earth

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Inside the earth

  1. 1. Inside the Earth
  2. 2. Composition (What it is made of) <ul><li>Crust </li></ul><ul><li>Mantle </li></ul><ul><li>Core </li></ul>
  3. 3. The Crust <ul><li>Outer layer </li></ul><ul><li>5-100 km thick </li></ul><ul><li>2 types of crust </li></ul><ul><ul><li>Oceanic (very dense, made of basalt) </li></ul></ul><ul><ul><li>Continental (less dense, made of granite) </li></ul></ul>
  4. 4. Oceanic and Continental Crust
  5. 5. The Mantle <ul><li>Middle layer </li></ul><ul><li>Very thick layer </li></ul>
  6. 6. The Core <ul><li>Made mostly of iron </li></ul><ul><li>1/3 of the earth’s mass </li></ul><ul><li>Very hot </li></ul>
  7. 7. Earth’s Layers <ul><li>How are the earth’s layers similar to an egg? </li></ul><ul><li>Shell=crust </li></ul><ul><li>Egg white=mantle </li></ul><ul><li>Yolk=core </li></ul>
  8. 8. Physical Structure of the Earth (5 Layers) <ul><li>Lithosphere - rigid outer layer (crust) </li></ul><ul><li>Asthenosphere - solid rock that flows slowly (like hot asphalt) </li></ul><ul><li>Mesosphere - middle layer </li></ul><ul><li>Outer Core- liquid layer </li></ul><ul><li>Inner Core- solid, very dense </li></ul>
  9. 9. Tectonic Plates <ul><li>Earth’s crust is broken into about 19 pieces </li></ul><ul><li>These plates move on top of the asthenosphere </li></ul>

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