Currently Earth is ________ during the Northern Hemisphere winter.
A. at 16.5 degrees tilt
B. at its average distance from the Sun
C. closest to the Sun
D. farthest from the Sun
E. at 25.5 degrees tilt
Answer: C
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The Enhanced Fujita scale is based on:
A) the measured wind speeds inside a tornado. B) the pressure gradient across the diameter of a tornado. C) the level of damage caused by a tornado. D) the frequency of lightning strikes concurrent with the tornado.
The monsoon winds in summer:
a. move from the oceans over the land. b. occur only on middle latitude west coasts. c. flow from land toward the oceans. d. are a main feature of the world-wide zonal pattern of circulation.
According to the polar front theory, cyclogenesis begins when
A) cold air begins to rise above the warmer air. B) an occluded front is formed. C) cold air begins to advance northward and warm air begins to advance southward. D) cold air begins to advance southward and warm air begins to advance northward.
Which of the following best matches the description?An environmental condition, the absence of which, prevents the success of an organism.
A. limiting factor B. interspecific competition C. intraspecific competition D. trophic level E. biomass F. producer G. herbivore H. omnivore I. denitrifying bacteria J. nitrogen cycle K. community L. carbon cycle M. habitat N. secondary consumer O. nitrogen-fixing bacteria P. ectoparasite