Topic 5: Living in Water

12345678910111213141516171819202122232425262728
Across
  1. 3. Several overlapping food chains.
  2. 5. When plants die they are broken down, or ________________.
  3. 7. When you take aquatic plants out of the water, this will often happen.
  4. 12. In the Great Lakes, abundance and mix of fish populations if declined due partly to ________________.
  5. 13. The concentration of a toxin is magnified through the food chain.
  6. 16. Aquatic plants have these on the top of their leaves.
  7. 17. Process of making food using energy from chemical reactions.
  8. 18. Sweeps food into its mouth by waving its legs.
  9. 20. Plant plankton.
  10. 21. Most aquatic animals use these organs to help them get oxygen from the water.
  11. 22. A crack in the ocean floor that release heat and minerals.
  12. 24. A type of plankton that is not microscopic.
  13. 25. Organic matter produced by decaying bodies of plants and animals.
  14. 27. Areas of a river where water moves quickly.
  15. 28. Areas of a river that are calm.
Down
  1. 1. A small, shallow, calm body of water.
  2. 2. These marine plants do not have roots, flowers, or leaves.
  3. 4. Sequences of feeding relationships between organisms.
  4. 6. A small fish that is a vital link in the food chains of many marine animals.
  5. 8. Variety of adaptations of living things.
  6. 9. Animal plankton.
  7. 10. Insects such as ________________ cling to rock bottoms.
  8. 11. Most marine organisms in the ocean live here.
  9. 14. An aquatic plant capable of photosynthesis.
  10. 15. Large aquatic animals are able to move easily through water because of this type of shape.
  11. 19. This structure allows seaweeds to attach to the ocean bottom.
  12. 23. A population explosion of algae.
  13. 26. This aquatic creature can move between fresh and salt water systems.