Across
- 6. A trench in the deep part of the ocean
- 7. A couple of volcano islands in the ocean in a cluster
- 8. The crust of the land we walk on
Down
- 1. The crust of which is under the ocean
- 2. A lowland region that is formed when earth's tectonic plates move apart or rift
- 3. Where the tectonic plates move creating a warp in the surface of the land
- 4. A large area of mountains that is consistent
- 5. The middle ridge of the ocean