Which of the following gases accounts for the largest amount of radiative forcing?
A) Carbon dioxide (CO2 ) B) Methane (CH4 )
C) Nitrous oxides (N2O) D) Chlorofluorocarbons (CFCs)
A
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Which of the three volcanoes has the steepest slope?
In this problem, you will compute the gradients of Mauna Loa in Hawai‘i, Mount Vsevidof in Alaska, and SP Mountain in Arizona. (You may also determine the elevation changes and distances needed to calculate these gradients by using Google Earth™.) The recommended starting point and distance to measure are given for all three volcanoes. What will be an ideal response?
Organic acids can chemically weather a rock. Where would these acids originate?
A) Decay of granite B) Thermal reaction between water and limestone C) Secretion from and decay of vegetation D) Leaching from the E horizon
True or False: Chert, composed mainly of quartz, forms only by inorganic processes
Indicate whether this statement is true or false.
The main effect of modern communications on social customs has been to
A) preserve folk cultures, by increasing awareness of their uniqueness. B) stimulate the diffusion of folk cultures around the world. C) increase the similarity of social customs in different locations. D) have little effect on the diffusion of social customs. E) slow the rate of change.