Determine whether the following scenario is an example of a point or non-point source of pollution. Thousands of pounds of road salt, applied during the winter, is dissolved and leached into the surrounding water table during the spring melt each year.
A. Point source
B. Non-point source
Answer: B
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The longevity of nuclear power plants has averaged about
A) 20 to 25 years due to unexpectedly high levels of corrosion and embrittlement. B) 40 to 50 years, longer than imagined, because neutrons tend to stabilize the building materials. C) 10 years, only about 25% of their expected life, due to the need for new government-mandated safety designs. D) 40 years, as expected, due to routine maintenance and the replacement with new longer-lasting materials.
What is NOT a reason that a levee originally built to contain a 100-yr flood would be insufficient?
a. ?Major floods occur more frequently as areas are developed. b. ?Floods larger than a 100-year flood can occur at any time. c. ?Flood levels generally rise over time. d. ?Sediment deposited by tributary streams degrades the levee. e. ?Levees are of varying quality.
Cones of depression are caused by ____
a. rapid artesian flow b. pumping water wells c. perched water tables d. sinkholes
Which processes must occur in a raindrop to produce a rainbow?
a. refraction, reflection, and dispersion of sunlight b. refraction, reflection, and scattering of sunlight c. reflection, scattering, and dispersion of sunlight d. transmission, reflection, and dispersion of sunlight e. refraction, transmission, and scattering of sunlight