Can you solve these physics riddles? ft Simone Giertz - Part 1/3

Ok this is probably 100% of the wrong theory, but with terminal velocity, would that have anything to do with the fact that the rate of gravity is 9.8 m/s/s? Because in class I am studying this area of physics and I remember my teacher dropping a ping pong ball and a tennis ball at the same time from the same height and they landed at the same time. We also watched a clip of a hammer and a feather being dropped at the same time on the moon and they landed at the same time. So would the answer to that be that they drop at the same time and have the same terminal velocity?