Across
- 5. / the region or area drained by a river
- 7. Vent / is an opening on the floor of the sea and which hot, mineral-rich solutions issue.
- 8. / production of light by living organisms in the deep ocean
- 9. / the saltiness of a body of water
Down
- 1. Basin / areas found under the sea
- 2. / a man made source supply
- 3. / are places where freshwater joins and mixes with saltwater
- 4. / plankton consisting of microscopic plant
- 6. / land that has a wet and spongy soil
- 8. Water / the mix of freshwater and seawater