Climate Change and Global Warming Review

What is climate change?

• Don't know

• Change in global climate, such as an increase in the global temperature and major variations in precipitation patterns. 

• The earth has become sick. 

• A change in the earth's climate due to human causes. 

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Which one of the following is not a possible consequence from enhanced global warming?

• lower sea levels

• methane escaping from melting permafrost

• extermination of species

• Greenland ice melting

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Climate change can lead to _______________.

• sea level rise and floods in coastal areas

• droughts

• spread of dengue fever and malaria

• all of the above

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By what amount did carbon dioxide in Earth's atmosphere increase between 1960 and 2000?

• 40 -50 ppm

• 60 -70 ppm

• 110 -120 ppm

• 360 -370 ppm

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Which of the following is part of a positive feedback mechanism associated with global climate change?

• Increased gas mileage in cars

• Increased cloudiness caused by more moisture in the atmosphere

• Melting of Arctic sea ice

• Increased acidity of seawater

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Which of the following actions would reduce global greenhouse emissions?

• Increasing the use of automobiles

• Decreasing the number of nuclear power plants

• Replacing coal-burning power plants with wind farms

• Converting tropical forests to rice paddies

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Landfills and livestock are the fundamental anthropogenic sources for which greenhouse gas?

• Nitrous Oxide

• CFC's

• Water Vapor

• Methane

• Particulate matter

Which is a major cause of increasing greenhouse gas production?

• Higher evaporation rates because of a greater area of blacktop roads.

• Less efficient energy usage because of a poor economy

• increasing use of fossil fuels because of growing populations and greater affluence

• Greater UV radiation exposure because of the thinning stratospheric ozone layer

• More intense Atlantic hurricane seasons because of global warming

Scientists believe that global warming in the last century has occurred from greenhouse gases and not solar radiation because of

• increased albedo due to an increase in

  solar radiation.

• observations of decreased atmospheric

  heat trapping in lower latitudes.

• observations of increased atmospheric

  heat trapping in colder regions.

• observations of hotter temperatures due

  to increased solar radiation.

• changes in the earth’s tilt and orbit.

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As an alpine glacier melts and recedes, it uncovers soil and rocks which have a lower albedo than the glacier. With a lower albedo, the soil and rocks reflect less light, absorb more solar radiation, and can warm Earth. This positive feedback system would cease to exist if

• the glacier starts to expand.

• the glacier becomes covered with soil

• global average temperatures fall.

• the glacier melts completely.

• atmospheric CO2 exceeds 450ppm

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