WE NEED:
- Balloons
- A candle
- A lighter
- Water
HOW TO DO IT:
1. Take a candle and lighter it up.
2. Inflate a balloon and see what happens when you hold it over the flame.
3. Take another balloon and fill it with water
4. See what happens when you hold it over the candle.
PREDICTIONS:
RESULTS:
The candle is a source of heat and will add heat energy to any object it touches. If this is well thermally insulated like the rubber in the balloon, the object will heat up to many hundreds of degrees Celsius. Rubber can't cope with these temperatures and it fails, causing the balloon to pop.
If there is water in the balloon the heat can be very efficiently transferred to the water. Water takes a huge amount of energy to heat up, so it stays relatively cool for a long time, cooling the balloon and stopping it heating up.
OUR OPINION:
Hello!!! We are two students of 4th and 5th. We like your experiments and your blog because Science is fun for us. We can use our brain!
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