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