Plate tectonics crossword puzzle
Across
- 3. the name of a single landmass that broke up around 200-300 million years ago
- 5. The layer of earth where convection currents take place
- 7. Two plates separating
- 9. The innermost/ densest layer of earth
- 10. a system that determines the distance of an object underwater by recording the echoes of sound waves
- 13. a process in which new land is created and the old land moves further away from where it was created
- 15. a break in the earths lithosphere along which the rocks move along
- 16. a vibration that travels through the earth carrying the energy released by an earthquake
- 18. Two plates sliding past each other
- 19. a extensive break in the middle of the ocean which shows how plates are moving
Down
- 1. a liquid-like solid layer in the mantle that the plates float on
- 2. Two plates colliding
- 4. a deep valley along the ocean floor where the oceanic crust sinks into the mantle
- 6. the upper most layer of the mantle
- 8. a deep valley that is formed when to plates move apart
- 11. Alfred Wegener created this idea
- 12. Large chunks of land that float on the mantle
- 14. The Scientist that created the plate Tectonics theory
- 16. process by which a denser crust sinks down into the mantle
- 17. The outermost/ least dense layer of earth