Guided Reading: What Is an Ecosystem

Name: ______Date: ______Period: ____

Guided Reading: Energy Flow in Ecosystems? Please read pages 86 – 89 in your text book and answer the following questions.

1.) What does everything an organism does 10.) What is an omnivore? require?

11.) What is the difference between a food chain 2.) What determines how many species and and a food web? individuals live in an ecosystem?

3.) What is the primary source of energy for an ecosystem? 12.) As you move up trophic levels in a food chain, what happens to the energy involved?

4.) What kind of organisms can convert light energy from the sun into energy used to grow? 13.) About what percentage of energy from one trophic level gets transferred to the next trophic level? 5.) What is an organism classified as if it can’t make its own food and needs to eat other organisms to survive? 14.) What is an energy pyramid?

6.) What is an organism classified as if they break down the remains of dead animals? 15.) What does each level in an energy pyramid represent?

7.) What is the sequence of the flow of energy in an ecosystem?

16.) As you go from the bottom to the top of an energy pyramid, what happens to the energy?

8.) What is each step in the transfer of energy through an ecosystem called?

9.) What is each level in a food chain made up of? a. First:

b. Second:

c. Third: