Plate Tectonics
Across
- 2. when a plate moves under another
- 4. lowland area where plates move apart
- 8. supercontinent
- 9. break in the earths crust from plate movement
- 10. how many plates are there
- 12. where most divergent boundries are found
- 15. evidence of a supercontinent from ice covering the earth
- 17. evidence of a supercontinent that comes from animals
- 19. occur when the earths crust cracks and magma rises up
- 20. longest fault line in the world
Down
- 1. 90% of the worlds eathquakes
- 3. two plates move away from each other
- 5. plate tectonics theory was develped ___ years ago
- 6. happens when plates move (converging or diverging)
- 7. layer of earth where convection currents occur
- 11. type of map that shows plate outlines
- 13. plate canada makes up
- 14. theory created by alfred wegener in 1912
- 16. outer layer of earth including the crust and upper mantle
- 18. when plates move towards each other