Which type of radiation is capable of causing a mutation?
A) microwaves
B) radio waves
C) ultraviolet light
D) all of these
C
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P-waves refract at the boundary between inner and outer core because
A) there is a change of phase between inner and outer core. B) there is a change in chemical composition between inner and outer core. C) they gain speed. D) they lose speed.
In a region where severe thnderstorms with tornadoes are forming, one would not expect to
observe a. a strong ridge of high pressure over the region. b. a dry tongue of cold air between the 700 and 500 mb levels. c. the polar jet stream above the region. d. moist warm air moving north at about the 850 mb level.
The impacts of unplanned growth of cities include
A. loss of habitat. B. air pollution. C. traffic congestion. D. All of the statements are correct.
Which of the following is not a difference between plants and animals?
A) Animals need nutrients and plants do not. B) Animals tend to be mobile and plants are not. C) Plants can fix solar energy into chemical form and animals cannot. D) Plants are more prominent than animals on the landscape. E) Plants have been more important to geographic study than have animals.