Across
- 1. over 70% of our planets _____ is produced by the ocean
- 6. we still only know a fraction of the marine ____ in our oceans.
- 8. the worlds largest ____ chain is underwater. older sponges are _____ than dinosaurs.
Down
- 1. ____ cover more than 70% of the earths surface.
- 2. the majority of life on ___ is aquatic.
- 3. its possible to find rivers, and ____ beneath the ocean.
- 4. oceans contain 99% of the _____ space on the planet.
- 5. whales make the loudest ____ underwater.
- 7. less than 5% of the _____ oceans have been explored.