Science project

Put Out the Fire!

  • What causes fire to burn?
  • What puts a fire out?
  • How does a fire extinguisher work?

Fire extinguishers work by using carbon dioxide to extinguishing the oxygen. A fire needs oxygen to burn. The carbon dioxide suffocates the fire. Fire fighters use this science in their daily work.  

In this science project, baking powder and vinegar are used to simulate the action of a fire extinguisher

  • Clear glass jar
  • Small ball of clay
  • Small birthday candle
  • Matches
  • 3 tablespoons baking powder
  • 1 tablespoon vinegar
  • Measuring spoons 

  1. Gather the necessary materials.
  2. Place a small ball of clay into the bottom of the glass jar. Stick the candle into the clay so that it stands upright.
  3. Pour the baking powder into the jar around the bottom of the candle. Be careful not to get the baking powder on the candle.
  4. Have an adult light the candle.
  5. Gently pour the vinegar down the side of the jar avoiding the flame. What happens to the flame? Record the results. 



extinguish: to put out 

oxygen: element in the atmosphere necessary for life 

carbon dioxide: element formed during respiration 


Fire needs oxygen to burn. When oxygen is removed from a fire, the fire goes out.


“How Fire Extinguishers Work” by Tom Harris at 

“How Fire Works” by Tom Harris at 

“Fire Safety” at Kids 

Fire Extinguisher: 101 at

Disclaimer and Safety Precautions provides the Science Fair Project Ideas for informational purposes only. does not make any guarantee or representation regarding the Science Fair Project Ideas and is not responsible or liable for any loss or damage, directly or indirectly, caused by your use of such information. By accessing the Science Fair Project Ideas, you waive and renounce any claims against that arise thereof. In addition, your access to's website and Science Fair Project Ideas is covered by's Privacy Policy and site Terms of Use, which include limitations on's liability.

Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state's handbook of Science Safety.

Add to collection

Create new collection

Create new collection

New Collection


New Collection>

0 items

How likely are you to recommend to your friends and colleagues?

Not at all likely
Extremely likely

What could we do to improve

Please note: Use the Contact Us link at the bottom of our website for account-specific questions or issues.

What would make you love

What is your favorite part about