Chapter 13-Env Science; multiple choice
Ozone in the stratosphere
Absorbs UV light
Ozone holes appear in polar regions during springtime when ozone-destroying
Chlorine atoms are released r I'm polar stratospheric clouds
La Niña is the ________ phase of ENSO.
Cold
Scientists predict that the Earths average temperature will _____________ throughout the 21st century
Continue to increase
Many scientists blame the presence of ___________ in the atmosphere for Earths increased average temperature
Greenhouse gases
greenhouse effect
Heat trapped by atmosphere near Earths surface
Earth's average temperature _______________ during the 20th century
Increased
Atmospheric CO2
Increases when fossil fuels are burned
Winter
Low angle sunlight
Latitude strongly influences climate because ____________ energy falls in areas that are closer to the equator than to the poles
More
During the summer, sunlight in the Northern Hemisphere shines
More directly for long says
Once in the atmosphere, CFC's
Persist and continue to destroy ozone for decades
Which of the following reduces CO2 in the atmosphere?
Phytoplankton, tropical rain forests, and oceans
Which of the following gases is most responsible for the greenhouse effect?
Water vapor
Surface Ocean Currents
caused by wind and influenced by Earths rotation
An important property of air circulation is
cold air is denser than warm air
stratospheric ozone
destroyed by CFCs
Montreal Protocol
international agreement to limit CFC production
DNA damage
potential result of high UV radiation at Earth's surface
The average global temperature has _____ during the 20th century.
risen some years and fallen others, but has increased overall
Climate in a region is
the long-term, prevailing atmospheric conditions
prevailing winds
trade winds, westerlies, and polar easterlies
Rain frequently results whenever
warm, moist air rises
La Nina
water is cooler than usual in the eastern Pacific Ocean
El Nino
winds push warm water eastward in the Pacific Ocean
