Passage III
Cloud cover is the percent of Earth's surface covered by clouds. Cloud cover may increase because of an increase in the cosmic ray flux (number of high-energy particles from space reaching Earth per m2 per hour). Table 1 shows how Earth's cover of low clouds (0 km to 3.2 km altitude) varies with the cosmic ray flux. Figures 1−3 show the relative cosmic ray flux, RCRF (the percent below the flux measured on October 1, 1965), and the monthly average cover of high clouds (6.0 km to 16.0 km altitude), middle clouds (3.2 km to 6.0 km altitude), and low clouds, respectively, from January 1980 to January 1995.
14. Based on Table 1, a cosmic ray flux of 440,000 particles/m2/hr would correspond to a cover of low clouds that is closest to which of the following?
Your Answer is
Correct Answer is H
Explanation
Looking at table 1, as the cosmic ray flux increases by 20000, the cover of low cloud increases by 0.3%, so when the cosmic ray flux=440000, the cover should be equal to 29.0%+0.3%=29.3%