Which of the following describes the frequency of tornadoes in Canada?
A. most frequent in spring, least frequent in fall
B. most frequent in summer, least frequent in fall
C. most frequent in summer, least frequent in winter
D. most frequent in spring, least frequent in winter
Answer: D
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Why do the natural reactions involving ozone not lead to depletion of the ozone layer?
A. Ozone is too diffuse. B. Ozone continually rises from the troposphere. C. Ozone breaks into fragments that can reassemble into more ozone. D. UV radiation generates more ozone. E. both c and d
What is the approximate population of Southwest Asia and North Africa?
A) 100 million B) 200 million C) 500 million D) 700 million E) 1 billion
A previously undiscovered fault may be detected in a ____ event
a. ?normal thrust b. ?reverse thrust c. ?liquefaction d. ?blind thrust e. ?strike-slip
Single-celled organisms can be found in all of the following groups except ________.
A. Bacteria B. Eukaryotes C. Archaea D. Animalia E. Prokaryotes