Across
- 2. Zone extends from 200 meters to 1000 meters. Sometimes referred to as the twilight zone.
- 8. the water portion of the ocean.
- 9. a fissure in the ocean floor from which mineral-rich, super-heated water
- 10. organisms that can swim freely
- 11. Zone extends from 1000 meters down to 4000 meters
- 12. microscopic aquatic animals
- 13. pyramid - a graphical representation designed to show the biomass or bioproductivity at each trophic level in a given ecosystem.
Down
- 1. microscopic aquatic plants
- 3. an autotrophic organism (as a green plant) viewed as a source of biomass that can be consumed by other organisms
- 4. the ability of some organisms to create food from chemical reactions rather than from sunlight.
- 5. pertaining to the ocean floor
- 6. web the interaction of multiple food chains
- 7. small floating organisms in the sea