Where in the United States is the risk of radon exposure lowest?
A) North Dakota
B) Alabama
C) New Mexico
D) Florida
E) Michigan
D
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If the Sun collapsed to become a black hole, the Earth's gravitational attraction to it would be
A. less. B. more. C. no different.
Which statement most accurately reflects the projections on temperature-related deaths in humans if our climate projections are accurate?
a. Cold-related deaths will decline, heat-related deaths will increase. b. Cold-related deaths will increase, heat-related deaths will decline. c. Cold- and heat-related deaths will not change. d. Heat-related deaths will not change, but cold-related deaths will. e. Cold-related deaths will not change, but heat-related deaths will.
The vertical profile of which of the following factors is the basis of the division of the Earth's atmosphere into layers?
A. air pressure B. wind speed C. air temperature D. air density
This volcano is broad and low, and is composed of basaltic lava flows. What kind of volcano is it?
A) Cinder cone
B) Shield volcano
C) Composite volcano
D) Volcanic dome
E) Caldera