Fireproofing a Balloon
Grade Level: 7th to 9th; Type: Physical Science
In this experiment we make a fireproof balloon.
- What makes the balloon pop when there is no water in it?
- What prevents the water balloon from popping?
- Does the rubber have anything to do with this reaction to fire?
If you hold a fire up to a balloon, it pops instantly. What if you could prevent this from happening? In this experiment, we will do just that.
- Water faucet
- Blow up a balloon with your mouth.
- Take the lighter and hold it lit underneath the balloon. (The balloon should pop.)
- Now get another balloon and fill it with water.
- After it has quite a bit of water in it, blow a bit of air into it.
- Hold a lit lighter beneath it. Observe. (The balloon should not pop, though the bottom is clearly turning black.)
- Now move the lighter higher up near the air-filled part of the water balloon. (It should pop almost instantly.)
Terms/Concepts: heat conduction, heat displacement, rubber’s reaction to heat
References: Transferring Heat: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatra.html
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