Plate Tectonics

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Across
  1. 5. The theory that pieces of Earth’s lithosphere are in constant motion, driven by convection currents in the mantle.
  2. 6. A deep valley that forms where two plates move apart.
  3. 7. A plate boundary where two plates move past each other in opposite directions.
Down
  1. 1. A plate boundary where two plates move toward each other.
  2. 2. A well- tested concept that explains a wide range of observations.
  3. 3. A plate boundary where two plates move away from eachother.
  4. 4. A section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust.
  5. 8. A break in Earth’s crust where masses of rock slip past each other.