Plate Tectonics

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Across
  1. 2. innermost layer of Earth
  2. 4. middle layer of Earth
  3. 5. a tectonic plate boundary where two pieces move away from each other
  4. 6. a tectonic plate boundary where two pieces move towards each other
  5. 8. outermost layer of a rocky planet or moon
  6. 10. rocky part of Earth made of crust and upper mantle
Down
  1. 1. the movement of continents over time
  2. 3. the process where new ocean forms as tectonic plates move apart
  3. 7. large piece of Earth's crust
  4. 9. a tectonic plate boundary where two pieces slide past each other