Chapter 13-Env Science; multiple choice

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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


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