Why Is the Hole in the Ozone Greatest Over Antarctica

question 49

Multiple Choice

Why is the hole in the ozone greatest over Antarctica?

• A)The ozone hole is a natural phenomenon related to high polar stratospheric clouds.
• B)South American countries have not ratified the Montreal Protocol and continue to release ozone-destroying CFCs.
• C)Chlorine freed from CFCs elsewhere migrate to the Antarctic region,where they are trapped by the polar vortex.
• D)Ozone,a greenhouse gas which traps ultraviolet energy radiated from the Earth's surface,has highest concentration in Antarctica.
• E)Melting permafrost releases ozone destroying methane.

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Definitions:

Muffled Speech

Speech that is difficult to understand due to distortion or low volume, often a symptom of a medical condition or obstruction.

Cholesteatoma

An abnormal, noncancerous skin growth that can develop in the middle section of the ear, behind the eardrum, often leading to hearing loss.

Otosclerosis

A condition affecting the ear where abnormal bone growth in the middle ear causes hearing loss.

Postmastoidectomy

Pertaining to the period after the surgical removal of mastoid cells, which is part of the temporal bone in the skull.