SAFETY NOTE: Please read all instructions completely before starting the projects. Observe all safety precautions.
Tip: Try to use the part of the charged object that has the biggest charge (the part that was rubbed the most) when doing these experiments. Also, Projects 1-3 work best on dry days.
Tip: Try to use the part of the charged object that has the biggest charge (the part that was rubbed the most) when doing these experiments. Also, Projects 1-3 work best on dry days.
PROJECT - Swinging cereal
What you need:- a hard rubber or plastic comb, or a balloon
- thread, small pieces of dry cereal (O-shapes, or puffed rice of wheat)
- Tie a piece of the cereal to one end of a 12 inch piece of thread. Find a place to attach the other end so that the cereal does not hang close to anything else. (You can tape the thread to the edge of a table but check with your parents first.)
- Wash the comb to remove any oils and dry it well.
- Charge the comb by running it through long, dry hair several times, or vigorously rub the comb on a wool sweater.
- Slowly bring the comb near the cereal. It will swing to touch the comb. Hold it still until the cereal jumps away by itself.
- Now try to touch the comb to the cereal again. It will move away as the comb approaches.
- This project can also be done by substituting a balloon for the comb.
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