Matter and Energy in Ecosystems

Where does the energy for photosynthesis come from?

• carbon dioxide

• oxygen

• the sun

• glucose

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NGSS.MS-LS1-6

In what way are photosynthesis and cellular respiration different?

• Cellular respiration stores energy, while photosynthesis releases energy

• Cellular respiration produces oxygen, while photosynthesis uses oxygen

• Photosynthesis releases energy, while cellular respiration stores energy

• Photosynthesis uses carbon dioxide, while cellular respiration produces carbon dioxide

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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

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Decomposers are important to ecosystems because they...

• return vital nutrients to the ecosystem

• capture energy from the Sun

• are producers

• can be omnivores

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NGSS.MS-LS2-3

What happens to the amount of carbon in an ecosystem as it moves through an ecosystem?

• Amount of Carbon increases

• Amount of Carbon decreases

• Amount of Carbon stays the same

• New Carbon is created when old carbon decomposes

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This tortoise is eating cactus on a sunny day. Is carbon moving into the air, moving out of the air, or both?

• Carbon is not moving into the air; it is only moving out of the air.

• With this information, there is no way to know for sure.

• Carbon is only moving into the air; it is not moving out of the air.

• Carbon is moving into the air and out of the air at the same time.

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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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NGSS.MS-LS2-1

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In an energy pyramid, which way does energy flow?

• from the top of the pyramid to the bottom

• from the bottom of the pyramid to the top

• none of these

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3