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Across 1. single cell algae with cell walls made of silica; they "fix" or trap carbon 4. deficiency of oxygen 5. the pattern of large scale movement in ocean water 6. areas of low oxygen, causing death or departure of organisms in the area (2 Words) 7. small and microscopic organisms floating in the ocean 10. the "twilight" zone of the ocean, only very filtered sunlight, great temperature fluctuations 11. microscopic marine algae 15. flow out of far northern regions toward the equator; the California Current is one (2 Words) 17. how "thick" or "heavy" ocean water is; determined by salt level and temperature 18. mass of liquid that flows in one direction 19. process where deep, cold water rises to the surface (2 Words) 20. the "sunlight" zone of the ocean, closest to the surface, wide seasonal temperature changes 21. the "midnight" middle zone of the ocean; 39 degree temperature, only light is from bioluminescent animals 22. single celled organisms

Down 2. physical rather than biological; not living 3. moving system of deep ocean circulation driven by salt content and temperature (3 Words) 4. deepest zone of the ocean; water is just above freezing, like the depths of the Marianas trench 8. force that deflects moving objects/currents to the right in the northern hemisphere and to the left in the southern hemisphere (2 Words) 9. colorless, odorless gas, a trace part of earth's atmosphere (2 Words) 12. zone near the bottom of the ocean, pitch black 13. current flowing out of the Gulf of Mexico and up the east coast of the United States (2 Words) 14. flow away from the equator; the Gulf Stream is one (2 Words) 16. colorless, odorless gas, big part of earth's atmosphere; life giving gas