Experiments with heat

Last week the children were busy doing science. Kristina was there to help out. Who from you knows the right answers?

How metals expand

A 50cent coin can fit between 2 nails, but what happens when we hold the coin above the flame for some time and try to place it between the nails again? Children knew the answer!

Conduction of heat along metal

We attached the tacks to the metal bar with melted wax from the candle. Then we placed the end of the rod over the candle flame. We held the rod in the same place, can you guess what happened?

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