1. What is the Photic Zone?
2. What is the Aphotic Zone?
3. What are some examples of benthos?
4. Warm water is ___________ _________ than cold water which means………?
5. Where a river begins is called the ______________.
6. The bottom of the river is called the ______________.
7. Where will the heaviest population of organisms be found and why?
8. Do wetlands always have to be covered in water?
9. Why are wetlands important?
10. Describe what an Estuary is.
11. What does the word salinity mean?
12. What types of organisms need to survive in the inner tidal zone?