Across
- 4. Outermost layer of the earth
- 5. The rigid, outermost shell of earth
- 8. The upper layer of the earths mantle
- 9. Type of excavation or depression in the ground
- 10. The central, spherical part of the earth below the mantle
- 12. Plates are moving away from one another
- 14. Movement in a gas or liquid in which the warmer parts move up and the cooler parts move down
- 15. A long, high sea wave
- 17. Supercontinent
- 18. The amount of force per unit of area that is put on a given material
- 19. An extended break in a body of rock
Down
- 1. A sudden and violent shaking of the ground
- 2. A squeezing force
- 3. A mountain or hill, typically conical, having a crater or vent
- 4. Plates that are moving toward one another
- 6. Sideways and downward movement of a plate beneath another plate
- 7. Drift Theory that all of earths continents were once joined together into a single landmass
- 11. Formulated the first complete statement of the continental drift hypothesis
- 13. Plates are sliding past one another
- 16. Layer between the crust and the core