Carbon Cycle

How does the carbon in grass become part of a lion?

• The lion eats the grass
• Carbon from grass doesn't end up in a lion. 
• The carbon ends up in the lion's food chain. 
• The lion breathes in carbon given out by the plant

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

• oxygen

• nutrients

• calcium carbonates

• fossil fuels

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If the plant population decreased, the amount of carbon dioxide in the atmosphere would _________.

• Stay the same

• Increase

• Decrease

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Combustion is another word for __________.

• Transportation
• Respiration
• Fossil Fuels
• Burning

What are the end products of cellular respiration? 

• Carbon dioxide, water and ATP energy
• Carbon dioxide, glucose and water
• Oxygen, glucose and ATP energy
• Water, Carbon dioxide and Oxygen

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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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In the carbon cycle, animals can release carbon back into the cycle through __________ or through __________.

• burning . . . photosynthesis

• fixation . . . decomposition

• decomposition . . . photosynthesis

• respiration . . . decomposition

• respiration . . . photosynthesis

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If a forest fire occurs, what will happen to most of the carbon in the forest?

• It will go into the soil

• It will go into the atmosphere

• It will runoff into nearby streams and rivers

• It will be destroyed

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Where does all the carbon in organisms (living things) originate from?

• Earth's atmosphere

• Rocks

• Water

• Soil

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What kind of organism takes out the most carbon from the atmosphere?

• Plants

• Bacteria

• Animals

• Humans

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