Across
- 4. what are the huge trenches on Earth's seafloor?
- 7. the amount of matter in a given
- 9. the layer of rock that forms Earth's outerskin
- 11. the hypothesis that the continents slowly move across earth's surface
- 15. a boundary at which two plates move past each other horizontally is called a...
- 16. what is the movement of matter that results from differences in density?
- 17. created the Tectonic Plate Theory
- 18. what is the outermost rigid layer of Earth?
- 19. when two plates move away from each other this is called...
- 20. created the Continental Drift
Down
- 1. two plates collide they make...
- 2. the hypothesis that lithosphere is divided into plates that are moving on top of the asthenosphere
- 3. a supercontinent
- 5. what is a layer of weak or soft mantle that is made of rock?
- 6. the flow that transfers heat within a fluid
- 8. a break in earth's crust along which rocks move
- 10. a deep valley that forms where two plates move apart
- 12. the lithosphere is divided into...
- 13. what explains the age and magnetic patterns of sea floor rocks?
- 14. a trace of an ancient organism that has been preserved in rock