making eggs float in water for Beaver experiment badge
1 egg per group
1 pint clear plastic tumbler per group.
large bag of salt
Three quarters fill the tumbler with water.
Carefully place the egg into the bottom of the tumbler.
Explain to the Beavers what you are going to do. Then ask them to predict how many teaspoon of salt they think it will take to make the egg float.
Beavers take it in turns to add teaspoons of salt, counting as they add.
In the name of a fair test the teaspoons of salt should always be the same e.g. a level teaspoon each time.
How many does it take before the egg starts to rise?