Y3 Topic Wk 4 Part One Volcano Experiment

How to make a volcano

You will need:

  • 10 ml of washing up liquid

  • 100 ml of cold water

  • 400 ml of white vinegar

  • Food colouring (optional)

  • Baking soda mixture (fill a cup about ½ half way with baking soda, then fill the other ½ with water)

  • Empty 2 litre soda bottle


NOTE: This should be done outside due to the mess.

  1. Combine the vinegar, water, washing up liquid and 2 drops of food colouring into the empty soda bottle.

  2. Use a spoon to mix the baking soda mixture until it is all a liquid.

  3. Eruption time! … Pour the baking soda mixture into the soda bottle quickly and step back!

How it Works:

A chemical reaction between vinegar and baking soda creates a gas called carbon dioxide. Carbon dioxide is the same type of gas used to make the carbonation in sodas (fizzy drinks).

What happens if you shake up a soda? The gas gets very excited and tries to spread out. There is not enough room in the bottle for the gas to spread out so it leaves through the opening very quickly, causing an eruption!

Extra Experiments to try:

1. Does the amount of vinegar change the eruption? 2. Does the amount of water change the eruption? 3. Does the amount of baking soda change the eruption?

Can you make predictions?

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