Why does the fridge keep food cold?
A fridge keeps food cold by carrying the warmth out of the inside.
Pip’s answer
- A fridge keeps food cold by carrying the warmth out of the inside.
- A special cold liquid runs through tubes and soaks up the heat.
- The heat gets pushed out the back, so the inside stays chilly. Brrr!
- Ooh, cold food stays fresh longer because tiny germs grow super slowly there!
For grown-ups
A fridge moves heat from inside to outside. A refrigerant liquid circulates in pipes; it evaporates inside the fridge, absorbing heat, then is compressed and releases heat through coils at the back. Cold slows the growth of bacteria, so food stays fresh longer.
Ask your child: Why do you think the back of the fridge feels warm?
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