Which of the following processes is NOT considered physical weathering?
A. prying by plant roots
B. oxidation
C. near-surface fracturing
D. frost wedging
E. thermal expansion
Answer: B
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Which of the following is the most reasonable conclusion based on the data in the figure?
A) Forest fires and fossil fuel combustion are increasing atmospheric carbon dioxide concentrations. B) There is a great deal of uncertainty in measurements of global atmospheric carbon dioxide levels. C) Carbon dioxide molecules multiply themselves over time. D) Average annual atmospheric carbon dioxide concentrations have been increasing since 1960.
The pKa of hydrocyanic acid is 9.31. What is the Ka of hydrocyanic acid?
A) 1.3 x 10^-24 B) 1.3 x 10^-10 C) 4.9 x 10^-10 D) 2.0 x 10^9
In the section on Physical and Chemical Properties, the figure was shown. What type of change is the candle undergoing?
a) physical b) chemical
Why has it been suggested that large earthquakes might be prevented by injecting water along isolated
portions of fault zones that have been inactive for an unusually long time? When was this technique discovered? What will be an ideal response?