Describes the complex communities of animal and plant life found in freshwater and marine ecosystems; presents a visit with a marine biologist, discussing the oyster population of the Chesapeake Bay; and includes a hands-on experiment on the effects of pollution on lakes and ponds.
Describes the characteristics of rain forest biomes, looks at where they are located in the world, discusses why rain forest environments are important, and identifies some of the plants and animals that live in them. Includes an activity.
