Ecosystem Matter and Energy Flow Quiz

What is the primary source of energy for most ecosystems?

• The Moon

• The Sun

• The Ocean

• The Wind

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Which of the following is a simple procedure to identify a producer in an ecosystem?

• Look for organisms that eat other animals.

• Identify organisms that make their own food through photosynthesis.

• Find organisms that decompose dead matter.

• Search for organisms that live in water.

In a food chain, which organism is most likely to be a primary consumer?

• Grass

• Rabbit

• Snake

• Hawk

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

• They produce energy from sunlight.

• They consume primary consumers.

• They break down dead organisms and recycle nutrients.

• They compete with producers for sunlight.

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NGSS.MS-LS2-3

How does energy flow in a food web?

• From top predators to producers

• From producers to top predators

• In a circular motion

• Randomly between organisms

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Which of the following statements best explains why energy decreases at each trophic level in a food chain?

• Energy is destroyed as it moves up the food chain.

• Energy is converted into matter at each level.

• Energy is lost as heat at each level.

• Energy is stored indefinitely at each level.

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What is the role of a model in understanding the cycling of matter in an ecosystem?

• It provides a detailed list of all species in the ecosystem.

• It visually represents the flow of energy and matter.

• It predicts the weather patterns in the ecosystem.

• It shows the exact number of organisms in each trophic level.

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Which of the following is an example of a nonliving component that plays a role in the cycling of matter in an ecosystem?

• Plants

• Animals

• Water

• Decomposers

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How does the removal of a top predator affect the flow of energy in an ecosystem?

• It increases the energy available to producers.

• It decreases the energy available to primary consumers.

• It disrupts the balance and can lead to overpopulation of certain species.

• It has no effect on the ecosystem.

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Which of the following best describes the cycling of matter in an ecosystem?

• Matter is created and destroyed as it moves through the ecosystem.

• Matter is recycled and reused by different organisms.

• Matter flows in one direction and is not reused.

• Matter is only used by producers and decomposers.

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