What Are Plate Tectonics?

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Across
  1. 6. Crust less dense and thick
  2. 7. When the continents were touching
  3. 8. Unevenly heated by Earth's core
  4. 9. Crust It is made of igneous rocks and minerals
  5. 10. Covered by a layer of rock
Down
  1. 1. A break in Earth's crust due to movement
  2. 2. Boundary Move towards each other
  3. 3. Boundary Slide past each other
  4. 4. Boundary Move away from each other
  5. 5. Waves Energy Waves that travel out