Unit 7: Ecosystems

If this ecosystem did not get rain for many months, how would this affect the stability of the food web?

• The lion would consume more zebras for energy.

• The lion would be unable to get enough food for energy.

• The lion would begin to consume vultures fro energy.

• The vultures would find other plants to eat for energy.

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The food web below is made up of organisms that live in a forest. What would happen if the grasses and seeds were removed from the forest?

• The mice would become the new producers.

• All the animals would either die or move away.

• The number of mice would increase

• 1. All the animal populations would increase.

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 Which sentence describes the interaction of a white-tailed deer with both biotic and abiotic parts of its ecosystem?

• The white-tailed deer hides behind a rock and uses the heat from the sun to stay warm.

• 1. The white-tailed deer protects its fawn from predators and shows the fawn how to find food.

• 1. The white-tailed deer rubs its antlers on a tree and eats leaves from the tree.

• The white-tailed deer eats grass in a field and drinks water from a pond.

Which of the following prairie food chains is in the correct order?

• 1. Eagles → prairie dogs → coyotes

• 1. Wildflowers → badgers → grasshoppers

• Sparrows → seeds → insects

• Grasses → prairie dogs → badgers

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Part A: 

Which statement BEST describes how an organism interacts with an abiotic factor in the ecosystem?

• The deer drinks the water.

• The frog jumps on a lily pad.

• The large fish eats insects and smaller fish.

• The ladybug rests on the leaves of the plant.

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Part B: 

Which statement BEST describes how the biotic factors in this ecosystem help the organisms survive?

• Nutrients in the soil help the plants to grow.

• The sun provides energy for the food web of the ecosystem shown.

• A rotting log provides shelter for animals and food for decomposers

• Fish and insects swim in the water and use it for their life processes.

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Mrs. Miranda’s class notices that the wooded area by their school has started filling up with litter. They decide to clean up the litter to help the health of the ecosystem in that area. How can they BEST communicate their solution? Circle the letters of THREE correct answers.

A. Make a flyer to ask for volunteers to help.

B. Put up posters to ask people to stop littering.

C. Send letters to farmers to ask them to use safer fertilizers in the area.

D. Ask people to turn down their car stereos when they are driving in neighborhoods.

E. Write a letter to the local paper telling people in the community about the problem.

• A, B, E

• C, D, E

• A, C, D

• B, C, D

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 Two box turtles live in an area in a zoo’s reptile house.  Zoo visitors made a list of observations of the turtles.  The list is shown.

1. 1. Sliding into a small pond

2. 2. Eating a strawberry

3. 3. Digging a hole in the sandy soil

4. 4. Climbing onto a flat rock

5. 5. Holding an earthworm in its mouth

6. 6. Walking across the area

Which observations best describe how box turtles interact with the biotic parts of their environment?

• 1. Observation 4 and 6

• 1. Observation 2 and 5

• Observation 1 and 5

• 1. Observation 3 and 4

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What should the students add to the model so that the snails will survive?

• 1. Fish to provide food

• 1. Sticks to provide a place to hide

• Deep water to provide carbon dioxide

• Living plants to provide oxygen

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