Plate Tectonics

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  • Due to tectonic plates, the continents drifted away from one another This theory is called Continental Drift.
  • What is Plate Tectonics • The Earth’s crust and upper mantle are broken into sections called plates • Plates move around on top of the mantle like rafts.
  • • Many years ago there was only one huge land mass.
  • Tectonic plates move toward each other, away from each other, and slide past each other. When they move toward each other, it creates mountains in the sea. If they move away, then underwater trenches are created.
  • Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics.
  • Intense heat simmering beneath the crust, Earth's surface is reshaping itself in the endless, slow-motion of plate tectonics. Its huge, rocky plates separate, collide, and slide past each other causing earthquakes, volcanic eruptions, and raising mountains.
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