Marine Ecosystem

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Across
  1. 1. where fresh water from a river mixes with salt water from the ocean
  2. 6. layer of the ocean below the photic zone; also known as the twilight layer
  3. 9. microscopic animals that float near the top layer of ocean
  4. 10. the variety of all organisms and their interactions
  5. 11. marine algae that provides shelter and food for many sea creatures
  6. 13. uppermost layer of the ocean where light can penetrate
  7. 14. examples include seals, whales, dolphins, and sea otters
Down
  1. 2. deepest layer of the ocean with no light; known as the deep sea
  2. 3. process by which plants and other producers use energy from sunlight to change carbon dioxide and water into oxygen and glucose
  3. 4. largest and deepest of Earth's five oceans
  4. 5. body of salt water that covers 70% of the Earth's surface
  5. 7. microscopic plants that serve as the base of aquatic food webs
  6. 8. official state marine fish of California
  7. 10. largest animal on Earth
  8. 12. where the ocean meets the land