Front

Second layer of the atmosphere, extending about 17-48 kilometers above the earth’s surface. It contains a layer of gaseous ozone, which filters out about 95% of the incoming harmful ultraviolet radiation emitted by the sun.

Back

Stratosphere

Front

Layer of gaseous ozone in the stratosphere that protects life on earth by filtering out most harmful ultraviolet radiation from the sun

Back

Ozone Layer

Front

The breakdown of stratospheric ozone can originate from the emission of chlorofluorocarbons (CFCs) and is catalyzed through a free chlorine (Cl) atom.

Back

I,&II

Front

Which agreement allowed for a reduction, and eventual elimination, of CFC production and use?

Back

Montreal Protocol

Front

How do CFCs affect ozone production?

Back

UV radiation frees a chlorine atom, which breaks down ozone.

Front

Depletion of ozone layer is a concern because it normally absorbs ____% of the sun's UV radiation.

Back

99

Front

Which of these sets of three items produce CFCs? Options: cars, factories, and cardboard, spray cans, cardboard, insulation, spray cans, refrigerant, cardboard, spray cans, refrigerant, insulation

Back

spray cans, refrigerant, insulation

Front

Why does the threat to upper atmospheric ozone continue despite curtailed CFC production?

Back

persist and continue to destroy ozone for decades.

Front

When oxygen gas in the lower stratosphere is struck by this, it splits, leading to the formation of an ozone molecule. Options: visible light, ultraviolet radiation, infrared, gamma rays

Back

ultraviolet radiation

Front

The formation of ozone begins when an O2 molecule is split by

Back

UV-C radiation