Carbon Cycle

What is photosynthesis?

• Photosynthesis is the process by which green plants use sunlight to synthesize foods with the help of carbon dioxide and water.

• Photosynthesis is the method by which animals convert food into energy.

• Photosynthesis is the way in which plants absorb nutrients from the soil.

• Photosynthesis is the process of converting sunlight into heat energy.

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How does the carbon cycle affect climate change?

• It increases the amount of oxygen in the atmosphere, leading to cooler temperatures.

• It regulates the levels of carbon dioxide in the atmosphere, which affects global temperatures.

• It has no significant impact on climate change.

• It decreases the levels of methane, which helps in warming the planet.

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How do animals contribute to the carbon cycle?

• Animals obtain carbon by consuming plants and other animals, and they release carbon back into the atmosphere through respiration.

• Animals contribute to the carbon cycle by storing carbon in their bones and shells.

• Animals do not play a role in the carbon cycle; only plants do.

• Animals release carbon into the soil through their waste products.

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What is the significance of carbon for living organisms?

• Carbon is a fundamental building block of life; all living organisms are made of carbon-based compounds.

• Carbon is primarily used for energy storage in living organisms.

• Carbon is essential for the formation of water molecules in living organisms.

• Carbon is a trace element that has minimal impact on biological processes.

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What is carbon sequestration?

• A process of capturing and storing atmospheric carbon dioxide to mitigate climate change.

• A method of increasing carbon emissions in the atmosphere.

• A technique for converting carbon dioxide into oxygen.

• A strategy for reducing water pollution in oceans.

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What is the impact of deforestation on the carbon cycle?

• Deforestation increases the number of trees that absorb carbon dioxide, reducing CO2 levels in the atmosphere.

• Deforestation has no impact on the carbon cycle.

• Deforestation reduces the number of trees that can absorb carbon dioxide, leading to increased levels of CO2 in the atmosphere.

• Deforestation helps in increasing the carbon storage capacity of the soil.

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What is the role of oceans in the carbon cycle?

• Oceans absorb a significant amount of carbon dioxide from the atmosphere, acting as a carbon sink and helping to regulate global carbon levels.

• Oceans release carbon dioxide into the atmosphere, contributing to global warming.

• Oceans have no significant role in the carbon cycle.

• Oceans only store carbon in the form of organic matter.

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Why is carbon essential for life on Earth?

• Carbon is a key component of biological molecules such as proteins, lipids, carbohydrates, and nucleic acids.

• Carbon is primarily found in the atmosphere and does not play a role in biological processes.

• Carbon is only important for plant life and has no significance for animals.

• Carbon is a rare element that is not necessary for life.

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What is respiration in the context of the carbon cycle?

• The process of photosynthesis in plants.

• The process by which living organisms convert glucose and oxygen into energy, releasing carbon dioxide as a byproduct.

• The breakdown of carbon compounds in the soil.

• The absorption of carbon dioxide by aquatic plants.

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How does carbon dioxide affect the Earth's temperature?

• It cools the atmosphere by reflecting sunlight.

• It is a greenhouse gas that traps heat in the atmosphere, contributing to the greenhouse effect and global warming.

• It has no significant effect on temperature.

• It increases the amount of oxygen in the atmosphere.

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