EXPERIMENT NO. 5
Have you ever asked yourself why it is that the wind blows? Why doesn’t it stand still?
Put your hand over a lamp chimney under which the lamp is lighted. You will soon discover that the heat is rising. Four things in connection with this are of great importance:
1. Air has weight. 2. When heated, it rises. 3. Air expands when heated. 4. Warm air will gather and hold more moisture than cold air.