Climate Change

Which of the following have been linked to climate change?  

• droughts
• flooding
• melting of polar ice caps
• all of the above

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

Visible light reaches Earth’s surface while infrared light is trapped as heat. Which characteristic of Earth’s atmosphere causes this to happen?

• the hole in the ozone
• the greenhouse effect
• atmospheric pressure
• the inversion layer

1.  Which of these could increase average global temperatures? 

• A.  increased use of fossil fuels 
• A.  increased ocean plants 
• A.  decreased carbon dioxide emissions 
• A.  increased numbers of animal species

Which of the following gases, released by animals as a waste product of digestion, can add to global warming?

• Carbon Dioxide
• Methane
• Chlorofluorocarbon
• Nitrogen

Over the past 200 years, the level of carbon dioxide in the atmosphere has

• decreased slightly.   
• increased until recently, and then decreased.
• increased steadily.   
• stayed about the same.

True or false: Warm air moves away from the equator, to the poles. Cold air moves from the poles to the equator.

• true
• false

What is the greenhouse effect?

• The warming of a planet due to trapped radiation.
• The cooling of Earth due to air pollution.
• The heating of a solid, such as a rock.

Which of the following are greenhouse gases?

• Carbon dioxide
• Methane
• Water vapor
• All answers are correct

The gas that is most abundant in the atmosphere is

• oxygen
• nitrogen
• carbon dioxide
• argon