1.Why is the Earth sometimes called "the water planet"?
2. What is a marine ecosystem? Name the different types of marine ecosystems.
3.What types of plants and animals might we find on a coral reef that we might never find in a bay? Why?
4.What kind of fish can live in both marine and freshwater ecosystems? Why does that fish swim as much as 2,000 miles back to freshwater after living most of its life in the ocean?
5.What are two types of freshwater ecosystems? Give examples of each type.
6.How do rivers usually start out? How different do they look by the time they empty into the ocean?
7.Why are biologists working on ways to stop the spread of the zebra mussel? What caused the problem?
8.What different things can cause water pollution?
9.How are wetlands different from ponds and lakes? What is the largest wetland in the US?
10.Why are swamps considered to be good places for many different types of creatures to live?
11 What are wetlands?
12. What is migration?
13. What is a predator?
14. What is prey?
15. What is a bay or harbor?