Topic 5: Living in Water

2. This aquatic creature can move between fresh and salt water systems.
3. Variety of adaptations of living things.
7. When you take aquatic plants out of the water, this will often happen.
10. This structure allows seaweeds to attach to the ocean bottom.
11. Organic matter produced by decaying bodies of plants and animals.
12. These marine plants do not have roots, flowers, or leaves.
13. A small, shallow, calm body of water.
15. Animal plankton.
17. The concentration of a toxin is magnified through the food chain.
20. When plants die they are broken down, or ________________.
21. An aquatic plant capable of photosynthesis.
24. A population explosion of algae.
25. Several overlapping food chains.
26. A small fish that is a vital link in the food chains of many marine animals.
28. Sequences of feeding relationships between organisms.

1. Aquatic plants have these on the top of their leaves.
4. Large aquatic animals are able to move easily through water because of this type of shape.
5. Areas of a river that are calm.
6. Plant plankton.
8. Sweeps food into its mouth by waving its legs.
9. A crack in the ocean floor that release heat and minerals.
14. Most marine organisms in the ocean live here.
16. Insects such as ________________ cling to rock bottoms.
18. In the Great Lakes, abundance and mix of fish populations if declined due partly to ________________.
19. Process of making food using energy from chemical reactions.
22. A type of plankton that is not microscopic.
23. Most aquatic animals use these organs to help them get oxygen from the water.
27. Areas of a river where water moves quickly.