a series of plants and animals, each of which depends on the one below it for food.

all of the feeding relationships within an ecosystem.

non-point source pollution

water impurity that is not caused by a single location but from many sources.

point source pollution

water impurity from a single source.

area that includes all of the land and waterways that drain into a body of water.

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Vocab Lesson 7

Great Lakes

Term	Definition
food chain	a series of plants and animals, each of which depends on the one below it for food.
food web	all of the feeding relationships within an ecosystem.
non-point source pollution	water impurity that is not caused by a single location but from many sources.
point source pollution	water impurity from a single source.
watershed	area that includes all of the land and waterways that drain into a body of water.