Plate Tectonics
Across
- 3. The amount of force per unit area.
- 6. currents Circular movement of a substance due to changes in temperature and density.
- 7. Convection currents occur in it.
- 9. Boundary Two plates moving towards each other.
- 11. When oceanic crust meets continental crust.
- 14. A trace of an ancient organism that has been preserved in rock.
- 16. boundary Sliding past each other horizontally.
- 17. Wegener Credited with the theory of Continental Drift.
Down
- 1. Tectonics Theory that crust is broken into plates and move around.
- 2. Occurs when forces act to stretch an object.
- 4. drift The theory that continents can drift apart from one another.
- 5. boundary Plates moving away from each other.
- 6. The central, spherical part of the Earth below the mantle.
- 8. The thin, outermost layer of the Earth.
- 10. Shakes the Earth.
- 11. spreading The process by which new oceanic lithosphere is created at mid-ocean ridges.
- 12. An ancient super-continent.
- 13. Breaks in crust.
- 15. Hess Credited with the theory of Plate Tectonics.
- 18. valley Formed when two plates pull apart and land falls downard.