Page 83 - Science Course 3 (Book 1)

Mo2-L5: Key Concept Check

Direction: On each line, write the term from the word bank that correctly completes each sentence.
Each term is used only once.

ecosystems energy energy transfer food chain
food web interconnected models omnivore
predator prey producer transferred

1. Energy can be from one organism to another.

2. Food chains and food webs are used to describe energy transfers.

3. A model that shows how energy flows in an ecosystem through feeding relationships is a(n)
.

4. A food chain always begins with a(n) because these organisms
are the source of energy for the other organisms in a community.

5. In a food chain, moves from producer to herbivore or
, and then on to other consumers.

6. In a food chain, arrows show the directions of . .

7. Most contain many food chains.

8. A(n) is a more complex model of energy transfer that can show
how the food chains in a community are .

9. In a typical food web, an arrow points from a(n) such as a mouse to
a(n) such as a cat.

Mo2-L5: Lesson Review Quiz (True or False)

Direction: On the line before each or statement, write T if the statement is true or F if the statement is
false. If the statement is false, change the underlined word(s) to make it true. Write your
changes on the lines provided.

1. Energy can be recycled through ecosystems as organisms grow, die, and decompose.

2. Most of the energy used by organisms on Earth comes from the Sun.

3. A food chain is a model that shows how matter flows through an ecosystem.

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