10. The two circular panels show that Mars has an interesting dichotomy in the elevation of its two hemispheres. Compare the elevations of the southern and northern hemispheres of Mars. If Mars once had oceans, in which hemisphere would they be? Why? Note that the right circular panel shows the elevation of the northern hemisphere, and the left circular panel shows that of the southern hemisphere. (3 points)Figure showing a topographic map of Mars lFigure: Topographical map of Mars: scale in km (image: from NASA}