Living things depend on one another and their environment for survival. As a basis for understanding this concept, students:
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Observe and describe how animals may use plants, or even other animals, for shelter and nesting.
Explain that food for almost all kinds of animals can be traced through a food web back to green plants.
Observe and explain that plants and animals both need to take in water, animals need to take in food, and green plants need light.
Recognize and explain that materials in nature, such as grass, twigs, sticks, and leaves, can be recycled and used again, sometimes in different forms, as birds do in making their nests.
Observe and describe how the local environment (water, dry land) supports a wide variety of plants and animals, some unique to the Chesapeake Bay.