The surface of the moon has dents on it. They’re called craters! They were made when space rocks, called meteorites, crashed into it.

  • Fill a tray with sand or flour. Don’t pack it down—the surface should be powdery, like the moon.
  • Gather some marbles and balls of different sizes and weights.
  • Drop them onto your moon surface.
  • Do different balls and marbles make different kinds of craters?
  • Does it make a difference if you drop the balls or marbles from different heights?
  • Try predicting the size of crater you’ll make before you drop a ball. Were you right?