Across
- 4. A deep flat area on the ocean floor
- 5. A deep canyon in the ocean floor
- 6. The steep slope from the shelf to the ocean floor
- 7. A line of volcanoes where two plates pull apart
Down
- 1. A curved chain of islands where two ocean plates collide
- 2. An underwater mountain made from a volcano
- 3. The shallow area from the beach to the ocean slope
