Passage VII
Radar observations of Saturn's moon Titan have revealed landforms that resemble longitudinal sand dunes found in some deserts on Earth. Such dunes are produced when sand-size solid particles are deposited in linear parallel piles (see Figure 1). Figure 2 shows the average dune spacing and average dune height for each of a number of areas of dunes on Titan and in 4 deserts on Earth (Deserts A-D). Figure 3 shows plots of the surface elevation (elevation above a horizontal reference plane) across a 25 km wide perpendicular cross section of dunes on Titan and in Desert A.
36. According to Figure 2, which of the following average dune spacings and average dune heights would be most likely for an area of Desert D dunes?
Your Answer is
Correct Answer is J
Explanation
Looking at figure 2, we can see that the dune spacing of Desert D is about 750-2000 m, and the dune height is about 3-20 m, so only option J fits this range