Across
- 2. boundary where 2 plates slide apart
- 4. trace of ancient organism preserved in rock
- 7. lithosphere broken into separate sections
- 8. ocean floor sinks below deep ocean trench
- 12. boundary where 2 plates move apart
- 13. drift that is slowly moving over earth
- 15. pieces of earths lithosphere in motion
- 17. Scientists who study the forces of earth
- 19. heat transfer by moving heated liquid
- 20. upper part of mantle crust forms rigid layer
Down
- 1. layer of rock that forms earths outer skin
- 3. forms part of mantle
- 5. Waves that occur after an earthquake
- 6. heat transfer by direct contact of particles
- 8. Well-tested concepts explaining observat
- 9. measure of mass
- 10. boundary where 2 plates slip past each other
- 11. transfer of energy through empty space
- 14. device that bounces sound waves off objects
- 16. has a liquid outer layer and a solid inner layer
- 18. solid layer of hot rock below earths crust