Exploring the Carbon Cycle in 3D

What makes Earth's biosphere an open system in terms of energy?

• The presence of autotrophs

• The recycling of water and minerals

• The continuous bombardment of energy from the Sun

• The burning of fossil fuels

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Which of the following is NOT a characteristic of autotrophs?

• They use energy from the Sun

• They consume other organisms for energy

• They perform photosynthesis

• They produce their own food from inorganic molecules

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What is the primary byproduct of photosynthesis?

• Water

• Glucose

• Carbon dioxide

• Oxygen

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How is glucose stored in plants for later use?

• As carbon dioxide

• As ATP

• As starch

• As cellulose

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What happens to the carbon in a tree when it is burned?

• It is released as carbon dioxide

• It is stored as glucose

• It is converted to oxygen

• It remains in the tree

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How do heterotrophs obtain energy?

• By producing their own food

• By converting water into energy

• By consuming other organisms

• By absorbing sunlight

What is the main purpose of oxidative respiration in cells?

• To convert carbon dioxide into energy

• To break down glucose and produce ATP

• To release oxygen

• To produce glucose

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What role do decomposers play in the carbon cycle?

• They release carbon dioxide by breaking down waste

• They produce glucose

• They convert carbon dioxide into oxygen

• They absorb carbon dioxide from the atmosphere

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How is carbon dioxide released into aquatic ecosystems?

• Through the burning of fossil fuels

• Through the absorption of sunlight

• Through oxidative respiration and decomposition

• Through photosynthesis

Why is the balance of the carbon cycle essential to life on Earth?

• It ensures a constant supply of oxygen

• It prevents the formation of fossil fuels

• It maintains the Earth's temperature

• It allows organisms to live and participate in the carbon cycle

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