How do landfills cause groundwater contamination? What can be done in the construction of a landfill
that will make it less likely to contaminate groundwater? What will be an ideal response?
Liquid waste seeps into the ground, and rainwater carries dissolved chemicals and pollutants down into
the groundwater reservoir. These toxic compounds include paints, solvents, cleansers, pesticides, and
battery acid, among others. A landfill can be designed and lined with an impermeable layer, such as
clay, to keep the contaminated water from trickling down into the aquifer.
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Since the 1960s in the United States, public policies and high taxes on cigarettes to discourage smoking have
A) increased, and the number of adult smokers has been cut in half. B) increased, but the number of adult smokers has stayed about the same. C) increased, but the number of adult smokers has increased by about 50%. D) decreased, and the number of adult smokers has dropped by about 20%.
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
Why is indoor pollution still such a large problem in developed nations? What are the most dangerous indoor pollutants in developing and developed nations?
What will be an ideal response?
A magma that crystallizes by fractionation from basaltic to granitic composition would form which type of rock during the final stages of cooling?
a. dark-colored rocks high in silica b. dark-colored rocks low in silica c. light-colored rocks low in silica d. light-colored rocks high in silica