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.
15. According to Figure 1, at approximately what altitude above their respective surfaces do Planets X and Y have the same atmospheric temperature, and what is that temperature?
Your Answer is
Correct Answer is C
Explanation
Find the intersection of the two lines Planet X and Planet Y in Figure 1, the abscissa of the intersection is about 140, and the ordinate is about 225.