Where is a "hole" in the ozone layer most notable?
A) The tropics
B) The middle latitudes
C) The Arctic
D) The Antarctic
E) Over the entire Earth
Answer: D
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Diatoms have one of the most efficient energy conversion rates known, using approximately 55% of absorbed sunlight
a. True b. False
Tornadoes that do not occur in association with a mid-level mesocyclone (or a pre-existing wall cloud) of a supercell are called ____________________ tornadoes
Fill in the blank with correct word.
The Caspian Sea
A) is in much greater danger than is the Aral Sea. B) is threatened by oil-industry pollution. C) has increased in size over the last three decades. D) is the smallest lake in Central Asia. E) drains into the Mediterranean.
A(n) ____________________ is a sharp, often pyramidal peak created by headward erosion of multiple alpine glaciers
Fill in the blank(s) with correct word