Across
- 4. a continuous series of undersea volcanic mountains
- 6. A crack caused by plate tectonics
- 8. a blast of heat from the core
- 9. boundary A tectonic plate that separates
- 10. boundary A tectonic plate that grates next to another one
Down
- 1. a process that causes plates to move
- 2. series of volcanoes under the sea
- 3. hot molten rock
- 5. boundary A plate that combines with one another
- 7. an oceanic trench that can be as big as a continent