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DON'T BURN YOUR FINGERS TO SNUFF A CANDLE

Snuff out a candle by ‘pouring’ carbon dioxide gas over it

Suitable For

Grade 8

Difficulty

2

Time Required

 <24 Hours

Supervision

Required

What’s it about?

As you know, water is most often used to put out a small fire, or you can also make use of a wet cloth to smother the fire. Carbon dioxide also scientifically known as CO2, which is widely used in fire extinguishers are commonly used to put out fires because it is heavier than air. In this science experiment we will be putting out a fire invisibly by ‘pouring’ carbon dioxide gas over a flame of a candle.

Topics covered

Carbon dioxide, Fire extinguisher, Oxygen

What will I need?

  • GLASS BOTTLE
  • CARD
  • VINEGAR
  • BAKING SODA
  • GLASS JAR
  • CANDLE

Procedure (Method)

Unfortunately, this section is only available in the e-book version of the project.

How does it work?

Unfortunately, this section is only available in the e-book version of the project.

When the carbon dioxide gas is ‘poured’ from the container over the candle and is contained in the glass jar, the air (oxygen) is pushed upwards as the heavier-than-air carbon dioxide fills up the bottom of the jar. When the candle’s flame is ‘below’ the air level, it is deprived of oxygen and is snuffed out. Nothing can burn without the oxygen in air.

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