Launch Lab: How can you bend water?
- Inflate a balloon, and tie the end. With a permanent marker, draw an X on one side of the balloon.
- Your partner holds a funnel over a large bowl and pours a cup of water through the funnel. As the water gently flows, bring the balloon as close to the stream of water as you can without getting it wet. Record your observations in your Science Journal.
- Next, rub the X side of the balloon on your sweater, and then hold the balloon next to the spot where you rubbed. Observe the interaction between your sweater and the balloon. Record your observations.
- Rub the X side of the balloon against your sweater again. Immediately repeat step 3.
Think About This
1. Infer Why did you rub the balloon on your sweater? Predict what might have happened if you simply touched the balloon to your sweater instead of rubbing it.
- To make the charge changes a lot. If we only touched them, the charge wouldn't have enough charge to attract or repel.
2. Key Concept Why do you think the balloon interacted the way it did with your sweater and with the stream of water?
- Opposite charges attracts, like charges repels.