|This experiment clearly shows|
how the molecules make the balloon
expand. When the bottle was in
the hot water it inflated. When it was in the
cold water it deflated.
We then took our classes out onto the field to show them this principle once again by flying a Chinese Lantern....what a disaster, it was far too windy. The balloon caught alight! At least we could show them why hot air balloon companies will never fly on windy days!
Today was far more successful. There was so much excitement as the Chinese Lantern flew up high. We tried to be quiet, so not to disturb the other classes, but the shouts of delight could not be contained. We were able to watch the lantern float for ages before the flame went out.