WT Life Science 2

What does a food web show?

• the amount of organisms that live in an environment

• the different paths that energy flows as it moves through an environment.

• how carbon dioxide and oxygen cycle through an ecosystem.

• which animals eat other animals.

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What would happen to this food web if the fish population decreased?

• The grass would not get enough nutrients

• The flies would not have anything to eat.

• The snail population would decrease.

• The entire food web would be affected.

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Decomposers get energy from breaking down dead organisms or the wastes of living things.

• True

• False

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What are two main kinds of decomposers?

• Fungi

• Bacteria

• Nitrogen cycle

• Ecosystems

What would happen if decomposers were removed from an ecosystem?

• The ecosystem would not be affected.

• Waste would pile up

• There would not be enough nutrients in the soil for plants.

• Animals would only eat plants.

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This diagram is an example of a

• Oxygen cycle

• Carbon Dioxide Cycle

• Water Cycle

• Nitrogen Cycle

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In a carbon dioxide oxygen cycle, which of the following best describes the movement of matter?

• Plants take in oxygen and give off carbon dioxide. Animals take in carbon dioxide and give off oxygen.

• Plants take in carbon dioxide and give off oxygen. Animals take in oxygen and give off carbon dioxide.

• Both plants and animals take in oxygen and give off carbon dioxide.

• Both plants and animals take in carbon dioxide and give off oxygen.

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All living and nonliving things that interact in an area is called:

• An ecosystem

• A food web

• A food chain

• Decomposers

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A healthy ecosystem is one in which many types of living things are able to meet their needs.

• False

• True

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All of the individuals of a species living together in a particular place is:

• Species

• Community

• Population

• Individual