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Why Earth’s plates move? How continental Drift works.

Why Earth’s plates move? How continental Drift works. Plate Tectonics. Vocabulary. Sea-Floor Spreading: the process by which new oceanic crust forms as magma rises toward the surface and solidifies Mid-ocean Ridge: An underwater mountain chain that runs through Earth’s ocean basins.

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Why Earth’s plates move? How continental Drift works.

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  1. Why Earth’s plates move? How continental Drift works. Plate Tectonics

  2. Vocabulary • Sea-Floor Spreading: the process by which new oceanic crust forms as magma rises toward the surface and solidifies • Mid-ocean Ridge: An underwater mountain chain that runs through Earth’s ocean basins

  3. Sea-Floor Spreading/Mid-ocean Ridge

  4. Movements • Convection Current: heated magma rises and cools sinking down towards the core. The plates slide along on top. • Subduction: an oceanic plate plunging (sinking) beneath another plate.

  5. Ridge Push: material at mid-ocean ridge pushes plates outward from mid-ocean ridge. • Slab Pull: As one plate subducts under another, gravity pulls subducting plate into the mantle.

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