Understanding the Role of Air in Burning

The video demonstrates that air is essential for burning. A candle is lit and covered with a glass tumbler. As the candle uses up the air inside the tumbler, it eventually goes out, illustrating that air is necessary for combustion.

What materials are required to demonstrate that air helps in burning?

• A candle and a glass tumbler

• A matchstick and a paper

• A lighter and a plastic cup

• A torch and a metal can

What should you do after lighting the candle in the experiment?

• Add more candles

• Place it in water

• Cover it with a glass tumbler

• Blow it out immediately

What happens to the candle when it is covered with the glass tumbler?

• It burns brighter

• It changes color

• It melts completely

• It goes off after some time

Why does the candle extinguish when covered by the tumbler?

• The candle wick is too short

• The glass tumbler is too heavy

• It uses all the air inside the tumbler

• It runs out of wax

What does the experiment demonstrate about air?

• Air is not needed for burning

• Air helps in extinguishing fires

• Air helps in burning

• Air makes candles melt faster