Topic 2 - Photosynthesis ('21-'22)

Photosynthesis involves the transformation of light energy into

• mechanical energy.

• hydroelectric energy.

• kinetic energy.

• chemical energy.

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Which of these processes produces oxygen?

• lighting a torch

• photosynthesis in plants

• respiration in animals

• burning coal for heat

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Carbon dioxide is returned to the atmosphere primarily by the

• process of photosynthesis.

• eruption of volcanoes.

• fallout from solar flares.

• respiration of consumers.

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Which would have the GREATEST effect on the rate of photosynthesis in a plant?

• starch concentration

• sugar concentration

• light intensity

• oxygen level

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Which plant cell organelle uses light energy to produce sugar?

• ribosome

• chloroplast

• nucleus

• mitochondria

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Plant cells make their own food by taking in

• carbon dioxide and water.

• carbon dioxide and oxygen.

• oxygen and hydrogen.

• oxygen and water.

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Plants use the energy from the Sun to convert-

• oxygen into carbon dioxide.

• oxygen into carbon dioxide.

• water into sugar.

• carbon dioxide into sugar.

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This organelle is found in plant cells, contains a green pigment, and is the site of photosynthesis. This organelle is the

• Golgi apparatus.

• mitochondrion.

• chloroplast.

• leucoplast.

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Plants provide energy to animals for their life processes by

• serving as a food source.

• receiving energy from the sun.

• providing shelter from weather.

• providing carbon dioxide.

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Look at the picture above. Formulate a cause and effect prediction that can be used to test the assumptions in the model of photosynthesis.

• limiting carbon dioxide will limit sugar production of the plant

• limiting sunlight, water, or carbon dioxide will limit sugar production of the plant

• limiting sunlight will limit sugar production of the plant

• limiting water will limit sugar production of the plant

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