Ecosystems ATS

What is an ecosystem?

• A. A community of only living things in their natural environment.

• B. A community of living and nonliving things in their natural environment.

• C. A community of only nonliving things in their natural environment.

• D. A community of animals in their natural environment.

What are producers in an ecosystem?

• A. Organisms that can break down dead organisms.

• B. Organisms that cannot make their own food.

• C. Living things that make their own food using sunlight, water, and carbon dioxide.

• D. Animals that eat plants and other animals.

Which of the following is an example of a consumer?

• A. Grass

• B. Mushroom

• C. Tree

• D. Bear

What role do decomposers play in an ecosystem?

• A. They make their own food using sunlight.

• B. They eat plants and other animals.

• C. They break down dead organisms and return nutrients to the soil.

• D. They play music.

What is a food chain?

• A. A path of energy transfer from one organism to another.

• B. A set of interconnected food webs.

• C. A community of living and nonliving things.

• D. A group of producers in an ecosystem.

What is a food web?

• A. A single path of energy transfer.

• B. A set of interconnected food chains.

• C. A group of decomposers in an ecosystem.

• D. A community of nonliving things.

What must a community of living and nonliving things provide for each organism to survive?

• A. Video games, pizza, and music

• B. Publix, Kroger, and Ingles

• C. Air, water, shelter, and space

• D. Trees, Flowers, Rivers, Oceans

What can cause changes in an ecosystem?

• A. Only natural events like floods and droughts

• B. Only human activities

• C. Both natural events and human activities

• D. Only changes in food chains

What happens when trees are cut down to build new structures?

• The habitat of many birds and small animals is destroyed.

• The trees grow back immediately.

• The environment becomes healthier.

• More food becomes available for animals.

What can changes in an environment disrupt?

• The energy flow in a food chain.

• The time of day.

• The day of the week.

• The temperature of the sun.