Across
- 3. elevated region with a central valley on an ocean floor at the boundary between two diverging tectonic plates where new crust forms from upwelling magma
- 5. barely enough sun to keep lit from being pitch black not enough sun to photosynthes.
- 6. caused by wind or earthquake more wind bigger waves.
Down
- 1. a plate in the ocean
- 2. a plate above water
- 4. caused by falling force of moon earth's rotation rises and fall's 2 times daily