Making indoor rain clouds…

Chemistry Experiment: Indoor Rain Clouds Making indoor rain clouds demonstrates the idea of temperature, the measure of how hot or cold something is. Take two clear glasses that fit snugly together when stacked. (Cylindrical glasses with straight sides work well.) Fill one glass half-full with ice water and the other half-full with very hot water (definitely an adult job – and take care not to shatter the glass with the hot water!). Be sure to leave enough air space for the clouds to form in the hot glass. Place the cold glass directly on top of the hot glass and wait several minutes. If the seal holds between the glasses, a rain cloud will form just below the bottom of the cold glass, and it actually rains inside the glass! (You can use a damp towel around the rim to help make a better seal if needed.)

You can turn this into a science fair project by testing the effects of water temperature… what is the ideal water temperature to really ‘make it rain’?

1 Comment

  1. In need of a last-minute science project Said,

    June 21, 2009 @ 9:01 am

    Thank you soooooooooooooooooooooooooooooooooo much!