Climate Change/Greenhouse effect

Which of these would probably lead to a decrease in global warming?

• an increase in the amount of carbon dioxide in the atmosphere

• an increase in the amount of water vapor in the atmosphere

• a decrease in the amount of oxygen in the atmosphere

• a decrease in the amount of methane in the atmosphere

Which two gases in the Earth's atmosphere are believed by scientists to be greenhouse gases that are major contributors to global warming?

• carbon dioxide and methane

• oxygen and nitrogen

• hydrogen and helium

• ozone and chlorine

What would earth be like without the greenhouse effect?

• too cold to be habitable

• a little colder than it is right now

• the same temperature as it is right now

• a little warmer that it is right now

Climate in a region is

• the long-term prevailing atmospheric conditions

• determined only by seasonal daylight hours

• the atmospheric condition on a given day

• never affected by ocean currents

The average global temperature has _________during the 20th century.

• remained the same

• decreased every year

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

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

This international agreement put limits on the production of CFC's

• Clean Air Act

• Kyoto protocol

• Smog elimination treaty

• Montreal Protocol

Chlorofluorocarbons (CFC's) molecules are environmentally significant because

• their chlorine atoms can destroy many stratospheric ozone molecules

• they are poisonous, flammable, and corrosive to metals

• their absorption of lethal solar energy protects earth.

• they readily create ozone molecules produced as pollution

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

• Greenhouse gas emissions have risen since the industrial revolution

Ultraviolet radiation is particularly dangerous because

• it can damage genetic material in cells

• little has been done to save the ozone layer

• it always leads to the rapid death of organisms

• sunblock cannot stop it

An increase in the Earth's temperature is known as

• the greenhouse effect

• acid rain

• global warming

• pollution