Across
- 3. centre of the earth, made of iron
- 4. rocky shell of the earth
- 6. point at which the rock first moves
- 9. method to determine the origin of an earthquake
- 11. scientist, continental drift
- 16. moving towards
- 17. earth's middle layer
- 18. cracks caused by movement of plates
- 19. moving away
- 21. envelope of gases surrounding earth
- 22. transfer of heat around in a circle
- 23. all the water on earth
Down
- 1. great southern continent
- 2. second wave to arrive
- 3. earth's outermost layer
- 5. this action creates mountains and hills
- 7. first wave to arrive
- 8. two plates moving past one another
- 10. great northern continent
- 12. point on surface, above earthquake
- 13. shaking, natural disaster
- 14. ____ plates
- 15. living things
- 20. supercontinent, contains all landmasses