Hot Air Up!

MATERIALS NEEDED:
two, small paper bags
two pieces of thread, approx. 10" long
tape
wooden balance
candle
match
STEPS TO FOLLOW:

one Open the bags. Use the tape to attach one end of string to each bag. Tie a loop on the free end of each string and hang from the ends of the balance rod.

two Move the bags along the ends of the rod until they are exactly balanced.

Hot Air Up movie
Click for QT movie. (283K)
Click for QT movie. (82K)

three Light the candle and carefully heat the air below one of the bags.

four Wait a few minutes. Observe. (The bag above the candle rises.)


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Last modified: Tue Mar 24 18:51:24 PST 1998

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