Determine the distance that the railway line covers on the map of three sisters​

Which of the following terms describes the layers of air surrounding the earth ?

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

What would have happened to portugal’s trade if they had not found a way to sail around the tip of africa