science

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Across
  1. 3. waves of sound that helps show what the ocean floor looks like
  2. 6. a coram of heat transfer
  3. 7. a remain of a plant or animal from long ago
  4. 8. when plates slide past each other
  5. 10. that forms in the ocean
  6. 14. a rock that is made mostly oxygen and silicon
  7. 16. when ocean floor falls back into the mantle
  8. 18. the theory that caused the continents to spread apart
  9. 19. the way to know if it will sink or float
  10. 20. a scientist who came up wit continental drift
Down
  1. 1. the supercontinent
  2. 2. the movement that moves the plates
  3. 4. a force that makes the inner core a solid
  4. 5. where plates pull apart
  5. 9. when plates collide
  6. 11. a layer in the earth
  7. 12. the layer in the earth that is solid metal
  8. 13. earth's thin layer
  9. 15. The theory that is in constant slow motan
  10. 17. when heat is transferred through direct contact