An "Ozone Hole" Is

question 352

Multiple Choice

An "ozone hole" is:

• A) a region centered on the equator where ozone levels are always very low because of destruction by direct sunlight.
• B) a region of the stratosphere, often above the South Pole, where ozone levels occasionally drop to very low levels.
• C) the name given to small pits or holes on the aluminum surface of an aircraft, etched by the corrosive ozone encountered in the stratosphere and requiring regular maintenance.
• D) a permanent region of very low ozone content in the stratosphere centered over the south pole that has been there for thousands of years; the resulting transparency to UV radiation accounts for the lack of life-forms there.

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