Passage III
The tropopause is the transition between 2 layers of Earth's s atmosphere: the troposphere (the layer that begins at Earth's surface) and the stratosphere (the layer just above the troposphere). Figure 1 shows how air temperature changes with altitude at 3 latitudes (0°, 45° N, and 90° N), as well as the average tropopause altitude for each of those latitudes. Figure 2 shows, for the tropical latitudes, the monthly averages for tropopause altitude, tropopause air pressure, and tropopause air temperature determined for a particular 30-year perIod.
11. According to Figure 1, at 45°N latitude, the air temperature at Earth’s surface is closest to which of the following?
Your Answer is
Correct Answer is C
Explanation
First find the 45°N curve in figure 1, and because the question is about the surface temperature, the ordinate altitude is 0, and the abscissa at this time is about 12°C