Put out the candle without blowing on it or touching it. When you do this experiment, you show that air is a mixture of invisible gases. One of these is especially important. It is oxygen which is used when things burn and produce energy.
Materials:
1. Candle
2. Coloured water
3. Glass jar
4. Bowl and Candle holder
Procedures:
1. Put the candle in the holder and place it in the bowl. Then pour in the water.
2. Ask an adult to light the candle. Then place the jar over it. Leave it for a little while.
3. At first, the water level in the jar rises, and then the flame suddenly goes out!
Air and Energy
Like other cars this racing car gets its energy from petrol burning in its engine. Burning fuel provides most of the energy we use forheating and powering machines. This process uses oxygen, which comes from the air around us.
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