Plate tectonics
Across
- 4. when the earth shakes
- 6. a long cut in the ground
- 8. sedimentary rocks typically occur in
- 10. where heat rises under the earth crust
- 12. a major fracture in the earths crust in North America
- 14. the solid outer part of the earth
- 15. a single supercontinent
- 16. belt of volcanoes
- 19. pieces of the earths crust
- 20. preserved of plants and animals
Down
- 1. elevated portion of the earth
- 2. the layer of granitic and metamorphic rocks
- 3. the layer of earth found under the oceans
- 5. opening or vents where lava is
- 7. horseshoe shape where the pacific plates meet the plate tectonics
- 9. extensive systems of fractures and faults
- 11. movement of continents
- 13. glacial ice more than 50,000 square kilometers
- 17. the denser,weaker layer of the earth
- 18. the edge of a continent that lies under the ocean