Energy Flow and Trophic Levels Quiz

What is the primary source of energy for most ecosystems?

• The Moon

• The Sun

• The Ocean

• The Wind

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Define "trophic level" in the context of an ecosystem.

• A measure of the amount of sunlight an area receives

• A step in a food chain or food web

• A type of habitat

• A classification of organisms based on size

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NGSS.MS-LS2-2

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Which of the following best describes the role of producers in an ecosystem?

• They decompose organic material

• They create energy from sunlight

• They consume other organisms

• They store energy in the form of fat

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NGSS.MS-LS2-3

What happens to the amount of available energy as you move up the trophic levels in an energy pyramid?

• It increases

• It remains the same

• It decreases

• It fluctuates randomly

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Explain why energy transfer between trophic levels is not 100% efficient.

• Energy is lost as heat

• Energy is stored in the soil

• Energy is converted into water

• Energy is destroyed

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Identify the trophic level that typically contains the most energy in an ecosystem.

• Primary consumers

• Secondary consumers

• Tertiary consumers

• Producers

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NGSS.MS-LS2-3

Describe the impact of energy loss on the structure of an energy pyramid.

• It causes the pyramid to become wider at the top

• It results in fewer organisms at higher trophic levels

• It makes the pyramid taller

• It has no impact on the pyramid's structure

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NGSS.MS-LS2-3

Which of the following organisms is most likely to be found at the top of an energy pyramid?

• Grass

• Rabbit

• Lion

• Algae

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NGSS.MS-LS2-3

How does the concept of an energy pyramid help in understanding ecosystem dynamics?

• It shows the distribution of water in an ecosystem

• It illustrates the flow of energy and the efficiency of energy transfer

• It maps the migration patterns of animals

• It predicts weather patterns

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NGSS.MS-LS1-6

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What is the role of consumers in an ecosystem?

• They produce their own food

• They convert sunlight into energy

• They obtain energy by eating other organisms

• They decompose dead material

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NGSS.MS-LS2-2

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