Monday, January 10, 2011


Experiment from Kasia & Asia

Needed materials:

- 2 eggs (1 raw, 1 hard boiled)
- 1 litre jar
- salt

The way of carrying out the experiments:

Fill half of the jar with water. Prepare a solution of salt and water. Put the eggs into the solution in which the eggs should sink. Observe the movement of the eggs when a little amount of fresh (sweet) water is being poured in.

Raw eggs has a bigger density than water, that's why it sinks after putting it into the jar with fresh water. Adding salt to water, increases the wieght of water. The weight of fresh water is smaller than the weight of egg. Dissolving salt in water increases the force of uplift which acts on the egg.

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