What is a tool that shows the relationship between distances on a map and actual distances

Number the steps from when a stimulus is received to when the body reacts

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.

In the late 1990s, brazil’s poor people protested about crowded cities land distribution mining permits industrial pollution