Exploring Photosynthesis and Respiration

Describe the role of light in the process of photosynthesis.

• Light provides the energy needed to break down food molecules.

• Light provides the energy needed to convert carbon dioxide and water into food.

• Light is absorbed by chlorophyll to release oxygen from water.

• Light is used to transport nutrients within the plant.

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Explain how carbon dioxide is used in photosynthesis.

• Carbon dioxide is absorbed by the roots and used to produce oxygen.

• Carbon dioxide is absorbed by the leaves and used to produce food.

• Carbon dioxide is absorbed by the stem and used to produce water.

• Carbon dioxide is absorbed by the flowers and used to produce chlorophyll.

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Investigate the importance of chlorophyll in photosynthesis.

• Chlorophyll absorbs water to produce food.

• Chlorophyll absorbs carbon dioxide to release oxygen.

• Chlorophyll absorbs light energy to convert it into chemical energy.

• Chlorophyll absorbs oxygen to produce carbon dioxide.

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Describe how water is involved in the process of photosynthesis.

• Water is absorbed by the leaves and used to produce carbon dioxide.

• Water is absorbed by the roots and used to produce food and oxygen.

• Water is absorbed by the stem and used to produce chlorophyll.

• Water is absorbed by the flowers and used to produce light.

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Explain the general process of cellular respiration.

• Cellular respiration converts oxygen into carbon dioxide and water.

• Cellular respiration breaks down food to provide energy and releases carbon dioxide.

• Cellular respiration converts light into chemical energy.

• Cellular respiration absorbs carbon dioxide to produce food.

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Describe how matter is transferred in the carbon cycle.

• Carbon is transferred from the atmosphere to the soil through precipitation.

• Carbon is transferred from organisms to the atmosphere through respiration.

• Carbon is transferred from the oceans to the atmosphere through photosynthesis.

• Carbon is transferred from fossil fuels to the atmosphere through photosynthesis.

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Construct a scientific model to show how carbon is cycled between the atmosphere and organisms.

• Carbon is absorbed by plants from the atmosphere and released back through photosynthesis.

• Carbon is absorbed by animals from the atmosphere and released back through respiration.

• Carbon is absorbed by plants from the atmosphere and released back through respiration.

• Carbon is absorbed by plants from the atmosphere and released back through decomposition.

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Cite evidence that living systems follow the Law of Conservation of Mass.

• In photosynthesis, the mass of carbon dioxide and water equals the mass of food and oxygen produced.

• In cellular respiration, the mass of oxygen equals the mass of carbon dioxide produced.

• In photosynthesis, the mass of light equals the mass of food produced.

• In cellular respiration, the mass of food equals the mass of energy produced.

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Explain how the Law of Conservation of Energy applies to living systems.

• Energy is created during photosynthesis and destroyed during cellular respiration.

• Energy is transformed from light to chemical energy during photosynthesis.

• Energy is transferred from plants to animals without any loss.

• Energy is stored in the soil and used by plants for growth.

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Describe the role of oxygen in cellular respiration.

• Oxygen is used to break down food and release energy.

• Oxygen is used to produce food and store energy.

• Oxygen is used to absorb carbon dioxide and release water.

• Oxygen is used to convert light into chemical energy.

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