The Maunder minimum or "Little Ice Age" of the late seventeenth century is believed to have been caused by:
A. a decrease in the concentration of greenhouse gases in the atmosphere
B. a period of very low sunspot activity
C. a large volcanic eruption
D. greater global albedo due to heavy cloud cover in the Northern Hemisphere
Answer: B
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A pharmacist asks a mother about a new prescription for an antibiotic, wanting to be sure that the drug is for the mother. The pharmacist is most likely concerned because
A) antibiotics are not typically effective for children. B) most types of antibiotics prescribed for an adult will likely kill a child. C) a normal dosage for an adult can be toxic to a child. D) a normal child's dosage may be toxic to an adult.
France intervened in Mali's civil war in 2013. This is an example of:
A) concerted UN action B) ongoing relationship with a former colony C) humanitarian aid D) religious war
Predict how a change in the hydrologic cycle, such as increased rainfall in an area, might influence the biosphere and geosphere in that area.
Which of the following explains why many household septic systems end up contaminating the shallow groundwater system?
A. all of the answers listed here B. drain field becomes plugged by solids leaving the septic tank C. residents pouring household chemicals down their drains D. water table is too high for the system to operate properly E. permeability of material beneath drain field is too low for proper drainage