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Curious Kids: how do freezers work?

By Stephen G Bosi, Senior Lecturer in Physics, University of New England
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How does the freezer work? — Leon, aged 4

Hi Leon,

That’s a great question! But freezers are a bit tricky to explain, so we’ll need to talk about a few other things first.

Everything you can touch and feel (like air, water, rocks and mice) is made of tiny balls called atoms. When atoms join up into small groups moving around together, they are called molecules. Atoms and molecules are too small to see without very powerful microscopes.

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