learning about insulation

We have been learning about insulation.  We learnt that blubber or fat keeps animals warm, especially animals that live in the sea.  Some whales have blubber that is over 30 cm thick!  Some animals have two layers of fur that keep them warm in the winter like the moose.
We did an experiment that showed that fat keeps us warm.  We used fat and put it on one hand and kept the other hand free.  We put both hands into icy cold water.  The hand with the fat on was heaps warmer than the hand without the fat on it.
Fat is an insulator.

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