Passage III
All known exoplanets (planets in orbit about stars other than the Sun) are too distant from Earth to be studied in detail, so mathematical models have been developed to help predict their properties. Figures 1-3 each show how a different property varies with altitude above the surface of Earth and above the surfaces of 2 hypothetical exoplanets: Planet X and Planet Y. Figure 1 shows how atmospheric temperature, T (in kelvins, K), varies; Figure 2 shows how atmospheric pressure, how P (in atmospheres, atm), varies; and Figure 3 shows how gravitational field strength, g (in newtons per kilogram, N/kg), varies.
16. According to Figure 2, which of the following graphs best represents the altitude above the surface of Earth, of Planet X, and of Planet Y at which P = 0.3 atm ?
Your Answer is
Correct Answer is F
Explanation
Looking at Figure 2, when the vertical coordinate P is 0.3, the corresponding horizontal coordinates of Earth, Planet X, and Planet Y are about 8, 47, and 0 respectively. Therefore, option F is the closest.