EnvSys Ch. 13.3 Test Review

Which of the following best describes measurements of CO2 levels in the atmosphere since 1958?

• Levels of CO₂ were steady until the mid-1970s, when they began to increase rapidly.

• Measurements of CO₂ have shown a steady increase since accurate measurements began.

• CO₂ levels are higher in winter and lower in summer, but the winter “highs” have increased each year and the summer “lows” have not fallen as far.

• CO₂ levels are lower in winter and higher in summer.

Which of the following gases is most responsible for the greenhouse effect?

• nitrous oxide

• methane

• oxygen

• water vapor

A true statement about greenhouse gases is that they

• convert sunlight into energy in the form of heat that warms Earth.

• are concentrated in the stratosphere.

• reradiate infrared radiation back to Earth.

• are not affected by human activity.

Which of the following statements related to global warming is not accurate?

• Carbon dioxide levels have risen over the last 30 years.

• Only fossil fuels, not living plants, release carbon dioxide when burned.

• Global temperature and carbon dioxide concentration are related.

• By itself, reforestation is not sufficient to slow global warming.

The difference between global warming and climate changes is that

• climate change only occurs along the equator

• previous changes in climate were dramatic but very short-lived.

• human-made chemicals such as CFCs do not influence global warming.

• global warming is a consequence of climate changes.

The average global temperature has _____ during the 20th century.

• remained the same

• increased every year

• risen some years and fallen others, but has increased overall

• risen some years and fallen others, but has decreased overall

Which of the following would not be a consequence of a rise in global temperature?

• rising sea level

• increased polar ice mass

• increased frequency of major storms

• increased frequency of major droughts

Which of the following will require most developed countries to decrease emissions of carbon dioxide and other greenhouse gases?

• Montreal Protocol

• Kyoto Protocol

• Emissions Reduction Act

• Reforestation Project

Some of the warming that has been observed over the 20th century can be attributed to

• human activity

• plant growth.

• glacial melting.

• droughts

The attempt to slow climate change is made difficult by

• economic factors.

• political factors.

• social factors.

• All of thesee