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.
Correct Answer:
Verified
Correct Answer:
Verified
Q239: Although it is not yet known precisely
Q240: What is the MOST important reason for
Q241: The Mid-Atlantic Ridge is being produced by<br>A)
Q242: The Himalayan Mountains in Asia were formed
Q243: High tide at any location on Earth
Q245: How was the Mid-Atlantic Ridge formed?<br>A) Two
Q246: How does Earth's albedo compare with those
Q247: Which was the first spacecraft to land
Q248: Against which tectonic plate is the Australia-India
Q249: The idea of continental drift, as proposed