Unit 4 lesson 3 How Can We Model a Food Web?

What is the main source of energy for the food web below?

• A. hawk

• B. rabbit

• C. plants

• D. toad

This diagram shows a food web. Which shows one food chain for the hawk?

• A

• B

• C

• D

In this food web, from where does the frog get energy?

• A. from the cricket

• B. from the fish

• C. from the grass

• D. from the snail

Which type of consumer is the hawk?

• A. a carnivore

• B. a decomposer

• C. a herbivore

• D. a omnivore

In a food web, energy is transferred between organisms. When an organism dies, what happens to the energy stored in its body?

• A. Fungi and bacteria use it for food.

• B. Plants use it to make their own food.

• C. Animals use it to grow strong.

• D. The organism rots and its energy is lost.

In Michael’s garden, caterpillars sometimes eat the vegetables. Then the beetles eat the caterpillars. If the beetle population decreased, what would most likely happen to the vegetables?

• A. There would be no vegetables.

• B. There would be more vegetables.

• C. There would be fewer vegetables.

• D. There would be no difference in the vegetables.

The picture below shows organisms that live in a marsh. How does energy move through this food web?

• A. heron, fish, sun, grass, water bugs

• B. water bugs, sun, grass, fish, heron

• C. fish, water bugs, grass, heron

• D. sun, grass, water bugs, fish, heron

In a forest, deer eat plants. Snakes eat small animals and birds. Raccoons eat mice, insects, fruits, and plants. What is the raccoon?

• A. carnivore

• B. herbivore

• C. omnivore

• D. producer

In a grassland food chain, grasshoppers eat grass and meerkats eat grasshoppers. What is the main role of the meerkat in this food chain?

• A. It provides energy to the grass.

• B. It obtains energy from the grass.

• C. It provides energy to grasshoppers.

• D. It obtains energy from grasshoppers.

Explain how energy flows through this food chain. Identify each organism as producer or consumer as well as each animal’s role as a herbivore, a carnivore, or an omnivore.