Carbon cycle and Water cycle

The process of plants turning carbon dioxide and water into oxygen and sugar is called

• Respiration

• Oxidation

• Photosynthesis

• Combustion

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How do plants affect the air that animals and people breathe?

• Plants use oxygen from the air to make their own food

• Plants release pollution into the air

• Plants take in carbon dioxide and release oxygen

• Plants take in oxygen and release carbon dioxide

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How does the human body return carbon to the atmosphere in the carbon cycle?

• Waste products

• Photosynthesis

• Cellular respiration

• Formation of glucose

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Organisms that do not decompose can be buried and become what?

• water
• nutrients
• air
• fossil fuels

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Why is burning fossil fuels harmful?

• they cause cancer

• They can get extremely hot

• it increases the amount of carbon dioxode/greenhouse gases in the air

• this would destroy fossils

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When humans EXHALE, we release ____________________.

• Oxygen

• Nitrogen

• Water

• Carbon Dioxide

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Through the process of photosynthesis, plants take in ________________ to make ______________________.

• CO₂, O₂

• O₂, CO₂

• H₂O, CO₂

• H₂, O₂

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Carbon moves from fossil fuels to the atmosphere when fuels are burned.

• True

• False

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What are fossil fuels made from?

• Plants and animals that are buried underground for millions of years.

• They absorb it from the atmosphere.

• Water

• Wind

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____________________ is a part of oceans, air, rocks, soil, and all living things.

• Nitrogen

• Water

• Carbon

• Silver

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