Across
- 2. move and collide
- 4. move away from eachother
- 5. hot fluid
- 8. long lowland depression
- 10. all earth
- 11. cause of earthquakes
- 13. chain of islands
- 15. transmission of impulses along nerves
- 17. small hot area
- 18. movement caused in fluid
- 20. a flat dish
Down
- 1. geological theory
- 3. emission of energy
- 6. molten rock
- 7. mantle beneath another plate
- 9. slide past eachother
- 12. string of volcanoes
- 14. mountain
- 16. old bones
- 19. degree of compactness