This was a cooperative learning activity. We worked with our home-teams to make a volcano using a plastic drinking bottle, tin foil and play dough. We painted it and added foliage to make it look more realistic.
We created a simulation of an erupting volcano using baking powder, red food colouring, washing up liquid and vinegar. The rest of the school came to watch the eruptions.
Volcanic Eruptions! on PhotoPeach
Why did this happen?
The red lava is the result of a chemical reaction between the baking soda and vinegar. In this reaction carbon dioxide gas is produced and pressure builds up inside the plastic bottle until the gas bubbles out of the volcano. This is a good representation of what happens in real volcanoes.