Passage VI
Figure 1 shows the relative ground elevation at Sites A-D in an earthquake-prone area, measured over 30 yr. Relative ground elevation is the vertical distance above or below the nearest benchmark (location of known, fixed elevation). Figure 2 shows the resistivity (which is directly proportion to the resistance to the flow of electrical current) of the bedrock in the same area, measured over 8 months (mo) in 1996. Figure 3 shows the level of the radon (a radioactive gas) emissions from well water in the same area, measured over 8 yr. The time at which an earthquake occurred in the area is indicated in all 3 figures.
30. Based on Figure 3, at the end of 1989, the level of radon emissions from the well water in the area studied was most likely closest to which of the following?
Your Answer is
Correct Answer is G
Explanation
Look at figure 3, when the abscissa is 1990, the ordinate is 6