Oceans

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Across
  1. 1. Imaginary line dividing Earth into Northern and Southern Hemispheres
  2. 4. Ocean zone with no sunlight
  3. 5. Deep, narrow valley on the ocean floor
  4. 8. How tightly packed matter is
  5. 9. Connected ocean covering Earth
  6. 10. Large movements of ocean water
  7. 13. Warm Atlantic current that helps heat Europe
  8. 14. Gas absorbed by oceans and used in photosynthesis
  9. 15. Movement of nutrient-rich deep water to the surface
  10. 17. Wind-driven movement of ocean water
  11. 21. Ocean zone where sunlight supports photosynthesis
  12. 22. Wind-created moving ridges of water
  13. 25. Tide with the smallest tidal range
  14. 26. Amount of dissolved salt in ocean water
  15. 27. Global system of deep-water circulation
  16. 28. Deep, flat region of the ocean floor
  17. 29. Ocean strongly influenced by monsoon weather
Down
  1. 2. Trait that helps an organism survive
  2. 3. Smallest and coldest ocean
  3. 6. Ability to produce light in the deep ocean
  4. 7. Process plants use sunlight to make food
  5. 11. Cold, salty water becomes this
  6. 12. Dissolved gas needed by marine organisms
  7. 13. Force that causes tides
  8. 16. Force created by the weight of water above
  9. 18. Daily rise and fall of sea level caused by gravity
  10. 19. Deepest ocean zone including trenches
  11. 20. Largest and deepest ocean
  12. 23. Tide with the greatest difference between high and low water
  13. 24. Twilight zone with very little light