The ozone thinning ("hole") that occurs in the upper atmosphere over each pole in winter is due primarily to
A. chlorofluorocarbons.
B. global warming.
C. lack of solar ultraviolet energy reaching the pole.
D. volcanic eruptions.
Answer: A
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According to the figure below, from which of the following directions do the prevailing winds blow?
A. north B. east C. west D. south
The ________ led to decreases in agricultural productivity in Renaissance Europe
Fill in the blank(s) with the appropriate word(s).
Earth is tilted at an angle of 23.5° with respect to the plane of its orbit around the Sun. If the amount of tilt were increased to 40°, we would expect in middle latitudes
a. ?hotter summers and colder winters than at present. b. ?cooler summers and milder winters than at present. c. ?hotter summers and milder winters than at present. d. ?cooler summers and colder winters than at present. e. ?no appreciable change from present conditions.
The Upper Mississippi River and the Lower Mississippi River have very different stream morphologies due in part because of the geology of the two regions
What is the basic geology of each region (What material is the river flowing over?), how does the geology control the river, and what is the morphology of the river as a result?What will be an ideal response?