The living part of an ecosystem is sometimes called a food chain. An ecosystem is a living community which depends on each  member and

surrounding environment. A food chain models the movement of energy in an ecosystem (a form of environmental system). Factors that affect the

 food chain will be discussed later.

After reading this lesson, the following questions will be answered:

1. What is a food chain?
   
2. What are the components of a food chain?
   
3. What is the difference between the" food chain" and "food web?"
   
4. Who are the players?

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