Carbon Cycle

What is the carbon cycle?

• The carbon cycle is the process by which nitrogen is exchanged between the atmosphere, land, ocean, and living organisms.

• The carbon cycle is the process by which water is exchanged between the atmosphere, land, ocean, and living organisms.

• The carbon cycle is the process by which carbon is exchanged between the atmosphere, land, ocean, and living organisms.

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What is a producer's job in an ecosystem?

• Produce food through photosynthesis

• Build nests for other animals

• Hunt for prey

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Which organisms are decomposers that help put nitrogen and carbon back into their cycles?

• Fungi

• Plants

• Bacteria

• Animals

What is the primary role of photosynthesis in the carbon cycle?

• Convert carbon dioxide into glucose

• Release carbon dioxide into the atmosphere

• Break down glucose into carbon dioxide

• Store carbon dioxide in fossil fuels

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Which of the following processes releases carbon dioxide into the atmosphere?

• Photosynthesis

• Respiration

• Nitrogen fixation

• Nitrification

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What is the main reservoir of carbon on Earth?

• Atmosphere

• Oceans

• Fossil fuels

• Soil

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How do plants contribute to the carbon cycle?

• By absorbing carbon dioxide during photosynthesis

• By releasing carbon dioxide during photosynthesis

• By converting carbon dioxide into nitrogen

• By storing carbon dioxide in their roots

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Which human activity is a major contributor to the increase of carbon dioxide in the atmosphere?

• Deforestation

• Planting trees

• Using solar panels

• Recycling

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What role do decomposers play in the carbon cycle?

• They fix carbon into organic compounds

• They release carbon dioxide by breaking down dead organisms

• They convert carbon dioxide into oxygen

• They store carbon in the soil

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Which of the following is a greenhouse gas involved in the carbon cycle?

• Oxygen

• Nitrogen

• Carbon dioxide

• Helium

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