What pH value is considered neutral?
A. 1
B. 5
C. 7
D. 10
E. 13
C
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A drop in the potentiometric surface of an aquifer
A. occurs only in very dry regions. B. reflects water use exceeding recharge. C. occurs only in an unconfined aquifer. D. All of the choices are correct.
When an herbicide is typically sprayed on a field, it breaks down in the presence of sunlight into a new molecule
Researchers hope to investigate whether the new molecule occurs in municipal water samples and well water in a rural community in Minnesota. This water testing, and a determination of the amount of chemical ingested by members of the community, represents a type of A) exposure assessment. B) dose-response assessment. C) hazard assessment. D) risk characterization.
The 1970 Clean Air Act's policy of command and controlled regulations of air pollution attempted to limit
A) all of the primary pollutants but not the secondary air pollutants. B) the ambient level of air pollutants below the primary standard levels. C) levels of air pollutants to 150% of the primary standard levels. D) air pollution at the level of the consumer by adding a pollution tax.
Hetch Hetchy provides the residents of San Francisco with ________
A) forest for recreation B) lakes for fishing C) water for drinking D) wilderness habitats E) miles of biking and hiking paths