Burning needs air
Show on a big screenAn oil lamp burns in the open. A cover is put over the lamp. The flame goes out.
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The idea
- An oil lamp burns. Fresh air reaches the flame.
- A cover goes over it. Fresh air stops coming in.
- After some time the flame goes out.
Combustion is burning. A substance joins with oxygen. Heat, light or both are given out.
Substances that burn this way are combustible substances. Dry grass, charcoal, candle wax and petrol are examples.
Magnesium is a silvery-white metal. It burns in air with a very bright light. Never look straight at it. Burning magnesium makes a white powder, magnesium oxide. Magnesium oxide is magnesium joined with oxygen.
Combustion needs a combustible substance and oxygen from the air. It gives out heat, light or both.
Because a covered flame gets no fresh air, the flame goes out.
Only an adult lights a flame. Stay well away from the flame.
Try the lab to finish this lesson.