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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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.
Diatoms have one of the most efficient energy conversion rates known, using approximately 55% of absorbed sunlight
a. True b. False
A(n) ____________________ is a sharp, often pyramidal peak created by headward erosion of multiple alpine glaciers
Fill in the blank(s) with correct word
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.