Module 1 Energy and Matter in Ecosystems Test Review

What happens to the parts of food molecules as matter moves through an organism?

• They are stored as fat.

• They are rearranged to make new molecules or release energy.

• They are excreted as waste.

• They remain unchanged.

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How are photosynthesis and cellular respiration related?

• They both occur in animals only.

• They involve a similar set of molecules.

• They produce the same amount of energy.

• They do not involve any chemical reactions.

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How is cellular respiration the opposite reaction to photosynthesis?

• Cellular respiration uses carbon dioxide to make sugar and oxygen.

• Cellular respiration uses oxygen to break down sugar into carbon dioxide and water.

• Photosynthesis uses oxygen to break down sugar into carbon dioxide and water.

• Photosynthesis uses carbon dioxide to break down sugar into oxygen and water.

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Which of the following flows through ecosystems in one direction?

• carbon

• energy

• nitrogen

• water

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In what form is energy that is NOT used for life processes released from living things?

• light energy

• sound energy

• thermal energy

• chemical energy

Why are food webs better representations of how energy moves through an ecosystem than food chains?

• Food chains include decomposers, which do not play a role in energy movement through an ecosystem.

• Food chains show how matter moves through an ecosystem, not energy.

• Food webs include how energy enters an ecosystem, and food chains don't.

• Food webs show that animals in an ecosystem can get energy by eating different things.

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Which organism has the most energy in this food web?

• diatoms

• squid

• leopard seal

• orca

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In the food web, what eats the squid?

• diatoms

• squid

• leopard seal

• orca

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How does the movement of water in ecosystems differ from the movement of energy?

• Water flows in one direction; energy cycles continuously.

• Water cycles continuously; energy flows in one direction.

• Both water and energy flow in one direction.

• Both water and energy cycle continuously.

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What process is shown in the figure?

• Photosynthesis

• Respiration

• Evaporation

• Condensation

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