Clouds

AsSalyamu `Aleykum wa RahmatuLlahi wa Barakatuh,

Equipment: container, plastic bottle, ice, straw, salt

1. Make 2 holes in a bottle's lid. Push straw in one of the holes.

2. Scatter ice in the bottom of the container, so it is going to be half full and next quarter put salt. Push bottle in the mixture as deep as possible.

3. Blow through the straw and see how a cloud is made.

What happened: What we breathe out contains a large quantity of water vapour - a gas that transforms itself into small water drops when hits the cold air of the test tube.