Transfer of Energy in Ecosystem

Using the artic food web shown, which group of organisms is not represented in the food web?

• Decomposers

• Herbivores

• Consumers

• Producers

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An arctic food web is shown. Suppose that the lemming population is removed from the web. Which of the following would be a likely short-term effect of this change?

• The arctic fox population will increase.

• The polar bear population will increase.

• The caribou population will decrease.

• The snowy owl population will decrease.

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NGSS.MS-LS2-1

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A team of ecologists observed feeding patterns of several populations in the desert. Which of the following best explains the difference in the amount of available energy in the trophic levels of the desert ecosystem?

• There is less energy in the producers because they are at the bottom.

• There is more energy in the producers because they provide energy for all the consumers in the ecosystem.

• There is more energy available in the tertiary consumers because they need the energy to hunt.

• There is more energy in the level containing the top predators because they are larger in size.

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NGSS.MS-LS1-6

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Using the everglades energy pyramid provided, which of the following statements describes the transfer of energy in this pyramid. Energy is transferred from ________ .

• from the grass, to the marsh rabbits, back to the grass

• from the Florida panther, to the gray fox, to the marsh rabbits

• from the grass, to the marsh rabbits, to the gray fox, to the Florida panther

• from the Florida panther, to the gray fox, to the marsh rabbits, to the grass

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NGSS.MS-LS2-3

Energy pyramids show the amount of energy in different trophic levels in an ecosystem. The diagram shows a simplified energy pyramid for the Florida Everglades. Which level contains the most energy?

• Grass

• Gray fox

• Marsh rabbit

• Florida panther

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NGSS.MS-LS2-3

Read the following passage to answer the question that follows.

Ducks and snails often eat grass and algae in freshwater ponds. The snails are eaten by mice and ducks. Foxes prefer to eat mice but will eat a duck if the opportunity arises.

Which of the following food chains correctly represents the information in the passage?

• snails --> algae --> mice --> fox

• fox --> ducks --> mice --> algae

• grass --> snails --> mice --> fox

• fox --> duck

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NGSS.MS-LS2-2

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Read the following passage to answer the question that follows.

Ducks and snails often eat grass and algae in freshwater ponds. The snails are eaten by mice and ducks. Foxes prefer to eat mice but will eat a duck if the opportunity arises.

What organisms would be considered primary consumers?

• algae and snails

• algae and grass

• snails and ducks

• only the fox

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NGSS.MS-LS2-3

In the food web provided, which organism is considered an omnivore?

• Grasshopper

• Frog

• Mouse

• Hawk

Only a small amount of the energy stored in food is available to the next organism in a food chain because _______.

• there are too many producers

• there are fewer top consumers in a food chain

• primary and secondary consumers compete for food

• most of the available energy is used by the organism or released as heat

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

A diagram of a food web is provided. Which organism receives the least amount of energy from the producers?

• Hawk

• Rabbit

• Grasshopper

• Mouse

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NGSS.MS-LS1-6

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