Across
- 4. is a geological force that contributes to plate tectonics.
- 5. a geologic process in which tectonic plates—large slabs of Earth's lithosphere—split apart from each other.
Down
- 1. consists of many peaks along both sides of a central valley. This chain of undersea mountains runs all around the world
- 2. sound gear
- 3. a subducting force that pulls down the heavy slab down to the mantle