Photosynthesis, Respiration, Carbon Cycle & Laws of Conservation

Why is the sun considered the first source of energy for ecosystems on Earth?

• All living things perform photosynthesis

• Photosynthetic organisms supply energy to all other life forms on Earth.

• All living things require sunlight for repiration.

• The sun is responsible for warming the Earth's surface.

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Which of the following processes does not involve the cycling of carbon through the biosphere and atmosphere?

• evaporation.

• consumption.

• burning of fossil fuels.

• decomposition of plants and animals.

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During photosynthesis, a plant releases a certain gas. If a student collects this gas at a temperature of 35°C, what is the gas most likely to be?

• carbon dioxide

• oxygen

• nitrogen

• glucose

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What components needed for the photosynthesis process?

• carbon dioxide and water

• oxygen and glucose (sugar)

• carbon dioxide and sunlight

• water and sunlight

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What would happen to a plant's glucose production if water or carbon dioxide is entirely removed from its environment?

• Glucose production will cease.

• Glucose will be produced at the same rate but without water.

• Glucose production will increase.

• Glucose production will initially decrease, then stabilize.

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What process do plants use to convert sunlight into energy?

• Cellular respiration

• Photosynthesis

• Fermentation

• Glycolysis

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Which is not a product of cellular respiration

• ATP

• carbon dioxide

• glucose

• water

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Why is it important for plants to have water, carbon dioxide, and sunlight?

• Because it enables them to convert light energy into chemical energy stored as sugars.

• Because it allows them to produce oxygen for aquatic animals.

• Because it helps them absorb excess nitrogen from the water.

• Because it allows them to recycle carbon dioxide into oxygen.

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When an organism dies, its remains undergo a process that releases some carbon into the atmosphere and converts the rest into fossil fuels over time. What is this process called?

• decomposition

• composition

• consumption

• deconsumption

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How is does photosynthesis use and produce carbon?

• It uses carbon dioxide and water to produce glucose.

• It supplies the carbon dioxide needed for photosynthesis.

• It offers the water necessary for photosynthesis.

• It gives the nutrients needed for photosynthesis.

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