Ecosystem Energy

A food web consists of?

• Many overlapping food chains in an ecosystem.

• A series of events in which one organism eats another and obtains energy.

• Amount of energy that moves from one feeding level to another.

• Many types of insects that are stuck.

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A third-level consumer has to be which type?

• Carnivore.

• Decomposer.

• Producer.

• Herbivore.

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Which level will contain plants?

• A

• B

• C

• D

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A secondary consumer 

• eats primary consumers

• eats producers

• eats plants

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This diagram shows the amount of energy that moves from one feeding level to another in a food web.

• Energy Pyramid

• Food Web

• Ecosystem

• Food Chain

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Where does the energy for photosynthesis come from?

• carbon dioxide

• oxygen

• the sun

• glucose

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How do consumers get energy?

• Absorbing sunlight

• breaking down dead organisms

• soaking it up from the ground

• feeding on other organisms

Scientists are studying photosynthesis in a desert ecosystem that has plants, animals, and decomposers (which consume dead things). Which group or groups of organisms in the desert carry out photosynthesis?

• plants

• plants and decomposers

• all organisms in the desert

• animals and decomposers

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NGSS.MS-LS1-6

Scientists are studying cellular respiration in a river ecosystem that has plants, animals, and decomposers (which consume dead things). Which group or groups of organisms in the river carry out cellular respiration?

• plants

• animals and decomposers

• all organisms in the river

• animals

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NGSS.MS-LS2-3

What will happen if a drought causes the population of grass to decrease?

• The population of decomposers will decrease because there are less organisms dying.

• The population of owls will not be affected because they are predators who do not eat grass.

• The population of mice will decrease because there will be less food available due to the drought.

• The population of grasshoppers will increase because they will find a different, better food source.

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