Climate Change and Human Impact

The average temperature of the surface of Earth has increased approximately 1°C in the past century. Which reason best explains this increase in temperature?

• lower levels of ozone in the atmosphere

• lower levels of nitrogen in the atmosphere

• higher levels of carbon dioxide in the atmosphere

• higher levels of oxygen in the atmosphere

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What is the primary greenhouse gas emitted?

• Methane

• Carbon Dioxide

• Nitrous oxide

• Flourinated gas

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The main human activity that releases greenhouse gases is...

• using bottled water

• burning fossil fuels

• texting on cellphones

• eating meat

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Consequences of climate change include:

• Stronger hurricanes

• Increased flooding

• Frequent droughts

• All of the above

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Climate scientists agree human activity is causing global temperatures to rise.

• TRUE

• FALSE

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How do human activities contribute to changes in climate?

• By releasing greenhouse gases

• By using renewable energy sources

• By planting more trees

• By reducing air pollution

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Mosquitoes, cows, and sea level rise are all related to ​ (a)  

• climate change

• lichens

• air pollution

• science

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Which of the following is the best conclusion that can be made from this graph?

• atmospheric carbon dioxide levels have been decreasing since 1960

• Hawaii has a lot of carbon dioxide

• humans have been working hard to decrease carbon dioxide levels

• atmospheric carbon dioxide levels have increased steadily since 1960

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Which of the following have been linked to climate change?  

• droughts

• flooding

• melting of polar ice caps

• all of the above

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How do scientists collect evidence about climate?

• using remote sensing from space with satellites

• by ground-based measurements of surface temperatures, carbon dioxide concentration and sea level

• by collecting “proxy data” from tree rings, ice cores, and historical records

• all of the above

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