We are continuing our unit on motion. Today we reviewed pushing and pulling. We talked about how an object has to have a force on it to move. Then I asked the kids how they could get a ball to move without touching. Pretty quickly someone came up with idea of blowing on it. They also brainstormed using a fan or having the wind blow it.
We made prediction about which of two types of balls would be easier to move by blowing on them, a golf ball or a ping pong ball. Then I gave each person a straw and he or she shared the golf and ping pong balls with a partner. They had to find out which was easier to move by blowing air through the straw. Here are some pictures:
We came back together and discussed which ball was easier to move..ping pong..and why...because it is lighter. Then we recorded the results in our science journals.