Across
- 3. lithosphere forms as magma rises to Earth's surface and solidifies
- 5. Study of the magnetic properties of rock
- 8. where two plates slide past eachother horizontally
- 10. a small,extinct land reptile
- 12. another word for sinks
- 15. Alfred Wegeners proposed hypothesis
- 16. tectonic plates that are moving away from eachother
- 17. landmass composed of all earths continents
- 19. layer of plastic rock just below the lithospher
Down
- 1. undersea mountain ranges that run steep valleys
- 2. forms where two plates collide
- 4. theory that explains why and how continents move
- 6. segments of a mid ocean ridge are connected by transform boundaries
- 7. process by which a continent breaks apart
- 9. molten rock
- 11. narrow valley that forms where the plates seperate
- 13. where one plate moves on to another plate
- 14. ridged upper part of the mantle form a layer of earth
- 15. movement of heated material due to differences in density
- 18. the force exerted by the sinking plate