Key learning points

1. The heavy base of a Bunsen burner does not get hot
2. Opening the air hole on a Bunsen burner changes the flame from orange and sooty to a hotter, cleaner, blue flame.
3. Adjusting the gas tap controls the size of the Bunsen burner flame.
4. A splint used to light a Bunsen burner should be lit from the nearest Bunsen burner that is already lit.
5. A lit splint should be carried with the flame angled slightly downwards and shielded by the other hand.

Keywords

• Bunsen burner - A piece of laboratory equipment used to heat substances in scientific experiments.

• Blue flame - A hot flame used for heating, produced when the collar is open to allow more air/oxygen in. It is dangerous because it can be difficult to see.

• Safety flame - An orange flame produced when the collar is closed, allowing less air/oxygen in. It is cooler than a blue flame and easier to see, making it safer.

• Collar - A small metal piece that can be turned to change the flame from orange to blue; it does not get hot.

• Splint - A thin, long piece of wood used to light Bunsen burners.

Common misconception