The Carbon Cycle and Temperature Change Effects

What remained constant in the atmosphere for most of the past 1000 years?

• Carbon dioxide levels

• Oxygen levels

• Hydrogen levels

• Nitrogen levels

What major change occurred in the late 18th century affecting the atmosphere?

• Decrease in oxygen

• Stable hydrogen levels

• Increase in carbon dioxide

• Reduction in nitrogen

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What is the role of oceans in the carbon cycle?

• Both a source and sink of carbon

• Neither a source or sink carbon

• Only source carbon

• Only sink carbon

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What started the Anthropocene epoch?

• Increase in agricultural activities

• Natural disasters

• Human impact on the environment

• Decrease in human population

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What is the annual addition of carbon to the atmosphere from fossil fuels?

• 950 million tonnes

• 9.5 billion tonnes

• 9.5 million tonnes

• 95 million tonnes

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What is the primary goal of reducing emissions from fossil fuels?

• Increase carbon in the atmosphere

• Stabilize the carbon cycle

• Decrease atmospheric oxygen

• Increase global temperatures

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What do negative emission schemes primarily aim to do?

• Increase carbon emissions

• Remove carbon from the atmosphere

• Produce more fossil fuels

• Decrease oxygen levels

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What is a major drawback of relying solely on negative emission schemes?

• They are widely implemented

• They are highly efficient

• They encourage continued pollution

• They decrease carbon quickly

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What will eventually force humans to stop using fossil fuels?

• Technological advancements

• Economic benefits

• Global agreements

• Depletion of resources

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How long might it take to restore the carbon cycle's dynamic equilibrium?

• A few decades

• Hundreds of years

• A couple of years

• Thousands of years

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NGSS.HS-ESS2-6

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