Radon typically is elevated in certain regions because of certain types of
A) bedrock
B) rainfall
C) industrial air pollution
D) waste disposal
A
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Which of the following statements about radiation is true?
A. Radiation has no beneficial health applications. B. Radiation is new: It is a man-made phenomenon. C. Radiation can be a useful tool. Like fire, it is only dangerous when misused. D. all of the above E. only A or B
As a result of trade patterns in medieval times, the Maldives are
A. Christian B. Muslim C. Hindu D. Buddhist
Where do the majority of hot springs in the United States occur?
a.) the West b.) the East Coast c.) the Midwest states d.) in Texas
Deep-water circulation brings dense, cold, oxygen-rich water from the surface to the deep ocean because of ________
A) greater rates of photosynthesis in deep water B) greater dissolution of oxygen in colder water than warmer water C) increases in pH with depth D) decreases in pH with depth E) greater volcanic out-gassing at the ocean surface