Across
- 4. a depression formed when a volcano erupts and collapses
- 5. a scientist who studies the earth
- 7. the deepest trench in the pacific ocean
- 10. when two plates move into each other
- 12. a sea wave caused by an earthquake or a volcanic under the ocean
- 14. a plate that slides up and down
- 15. the center layer of planet Earth
- 16. molten rock that is deep below the earth's crust
- 17. when hot magma moves to the surface
- 19. when two plates move away from each other
- 20. a scientist who studies a volcanic
Down
- 1. when one plate moves under another plate
- 2. what was believed to be a super continent
- 3. an instrument that measures how much force a earthquake has
- 6. a line where two plates meet and earthquakes and volcanic occur
- 8. the paper used by a seismograph
- 9. heated water that erupts from under the earth's surface
- 11. when the earth moves because plates move
- 13. crust the thicker layer of the earth's
- 18. pieces of the earth's lithosphere which together make up the earth's surface.