Why Are Chlorofluorocarbons So Damaging to the Ozone Layer When

question 44

Multiple Choice

Why are chlorofluorocarbons so damaging to the ozone layer when they are such stable molecules?

• A) They contain a double bond that ozone readily attacks, resulting in the destruction of the ozone.
• B) They are very light molecules that rapidly diffuse into the upper atmosphere and block the radiation that causes formation of ozone.
• C) The radiation in the stratosphere dissociates them producing chlorine atoms that catalytically destroy ozone.
• D) They are greenhouse gases that raise the temperature above the dissociation temperature of ozone.
• E) CFCs do not damage the ozone.

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Definitions:

Senescence

Sum of the processes involving aging, decline, and eventual death of a plant or plant part.

Cytokinin

Plant hormone that promotes cell division; often works in combination with auxin during organ development in plant embryos.

Gibberellin

A group of plant hormones that stimulate stem elongation, germination, and flowering.

Ethylene

Plant hormone that causes ripening of fruit and is also involved in abscission.