Alex Science Crossword

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Across
  1. 3. Theory of how the plates move.
  2. 6. Transfer of heat through motion of liquids and gases.
  3. 7. Idea that continents move around on Earth's surface.
  4. 9. A long chain of undersea mountains.
  5. 14. A lithospheric plate boundary where two plates come together.
  6. 15. Process involving a lithospheric plate sinking into the mantle.
  7. 17. Thick layer of Earth between crust and core.
  8. 18. Huge landmass composed of earlier forms of todays continents.
  9. 19. A lithospheric plate ________ where two plates move apart.
  10. 20. Outermost layer of Earth.
Down
  1. 1. Seismic waves that move side to side.
  2. 2. Vibrations that are caused by earthquakes.
  3. 4. Thick lithospheric plates that form the continents.
  4. 5. Plates that form the ocean floor.
  5. 8. Valley in the ocean created when one lithospheric plate subducts under another.
  6. 10. Movement beginning at one location and sets thing in motion far away.
  7. 11. Waves that move with a forward and backwards motion.
  8. 12. Scientists who detect seismic waves.
  9. 13. The center of the Earth.
  10. 16. Mass of an object divided by its volume.