Photosynthesis Lesson

Photosynthesis occurs inside of which organelle?

• chloroplasts

• the cell wall

• mitochondria

• ribosomes

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NGSS.MS-LS1-6

Which of the following is converted into chemical energy during photosynthesis?

• oxygen

• sound energy

• light energy

• glucose

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Photosynthesis occurs

• in the cells of autotrophs.

• in the cells of heterotrophs.

• only in the upper troposphere.

• when plants or animals decompose.

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How do plants get the carbon dioxide they need for photosynthesis?

• Carbon dioxide is produced in a chemical reaction inside their chloroplasts.

• Carbon dioxide enters their leaves from the atmosphere.

• Carbon dioxide enters their roots from the soil.

• Carbon dioxide is produced in a chemical reaction inside their mitochondria.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

In addition to carbon dioxide, ___________ is a reactant of photosynthesis.

• oxygen

• glucose

• carbon dioxide

• water

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What do plants do with most of the oxygen produced in photosynthesis?

• They use most of the oxygen to make more glucose.

• They release most of the oxygen into the atmosphere.

• They release most of the oxygen into the soil.

• They use most of the oxygen to produce carbon dioxide.

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NGSS.MS-LS1-6

Why is photosynthesis important to plants?

• It prevents the buildup of too much water in their cells.

• It produces the carbon dioxide they need for plant digestion.

• It breaks down a simple sugar into a type of energy their cells can use.

• It produces a simple sugar they need for cellular respiration.

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Photosynthesis is important to animals because

• oxygen, which animals breathe, is released as a byproduct.

• carbon dioxide, which animals need for cellular respiration, is released as a byproduct.

• it prevents any of the sun's energy from being absorbed by animals' skin.

• it prevents carbon dioxide from destroying animals's habitats.

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Animals, including humans,

• do not need glucose.

• make their own glucose.

• get glucose from the food they eat.

• get glucose from the sun's energy.

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Photosynthesis is an important part of the carbon cycle.

• True

• False

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NGSS.MS-LS1-6