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By Patty Rooks on March 8, 2025.
What a busy time of the year! I have been to MANY science fairs these past couple of weeks and I have to say there are many phenomenal projects done by the young scientists in our communities. The hard work each and every one of you have done over the past few weeks shows and is paying off. Do not forget to register for the Regional Science Fair which will be on Saturday, March 22 at Medicine Hat College. Of special note, this is our 50th Anniversary! The registration deadline is March 17 so do not delay. Remember that the Regional Science Fair is open to ALL students in southeastern Alberta. You never know, you could be the grand prize winner attending the Canada Wide Science Fair in Fredericton, NB this May.
Since you have all been working hard, I thought this week I would go easy on you and do something simple…yet fun! Let’s get started!
*Remember to ask an adult before doing this experiment.
Materials
• balloon
• clean, dry head of hair, or a wool sweater
• sheet of black paper
• salt
• pepper
• sturdy surface
• measuring spoon
Procedure
1. Place the sheet of black coloured paper on a sturdy surface.
2. Place six tablespoons of salt on the paper. You want to have a nice mound of salt.
3. Add three tablespoons of pepper.
4. Make sure the mixture is mixed up well.
5. Blow up the balloon and tie it.
6. Rub the balloon in your hair (or a volunteer’s hair). Rub HARD and REALLYwell.
7. Slowly place the balloon over the salt and pepper mixture.
8. What do you see?
9. Did you hear anything?
10. Repeat.
Caution: You do not want to touch your eyes while doing this experiment as the pepper powder on your fingers will really sting your eyes. Once you are done, be sure to dispose of the balloon and wash your hands very well.
Explanation
You should have heard and saw the pepper quickly attract to the balloon. This is because when you rubbed the balloon in your hair, it became charged. The pepper in this experiment was uncharged. When you held a charged object (balloon) over the pepper that was uncharged, it quickly became attracted to it. If you carefully look at the bottom of the balloon, you will be able to see all of the pepper stuck to it.
If you have any questions with regards to Science Fair, do not hesitate to call me anytime at Praxis. Patty Rooks, senior scientific consultant PRAXIS, “Connecting Science To The Community.” Contact Praxis at praxis@praxismh.ca, Tweet or follow us @PraxisMedHat, or friend us on Facebook. Address: 12 826 11th Street SE, Medicine Hat, AB, T1A 1T7 Phone: 403-527-5365, email: praxis@praxismh.ca.
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