Across
- 4. occurs at divergent boundaries
- 7. Two tectonic plates come together
- 8. developed the theory that the continents drift
- 10. molten rock
Down
- 1. the upper layer of the earth's mantle, below the lithosphere
- 2. the rigid outer part of the earth, consisting of the crust and upper mantle
- 3. Two tectonic plates move away from each other in opposite directions
- 5. structure of the earth's crust and the large-scale processes which take place within it
- 6. when two plates slide past each other
- 9. Discovered that magma was rising on the sea floor causing it to spread