Cameron's Crossword Puzzle

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Across
  1. 2. when magnetized objects point north
  2. 3. The surface that is made of rough slabs of rocks that move in respect of one another
  3. 4. mountains in the ocean on the seafloor
  4. 5. when magnetized objects will point south
  5. 6. the outernost layer of the Earth that is frigid and rough
  6. 7. Earth's continents are always in motion
  7. 8. something that backs up a fact or a hypothesis
  8. 10. when two of Earth's plates smash together
  9. 13. when new crust forms along a mid ocean ridge and old crust moves away from the ridge
  10. 16. rounded structures that are formed because lava erupts into water and cools rapidly
  11. 17. when a slab pulls part of the plate down
  12. 19. lava that is below Earth's surface
Down
  1. 1. when two of Earth's plates separate
  2. 9. when Earth's magnetic field reverses direction
  3. 11. a tool scientists use to determine the depth of an ocean
  4. 12. A plant that grew in a swampy environment
  5. 13. when the heavier plate sinks below the lighter plate
  6. 14. magma that is above Earth's surface and comes from a volcano
  7. 15. someone who studies rocks
  8. 18. The supercontinent