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A thermometer measures temperature using mercury which, like most things, expands when it gets hotter. Click here to read more.
Refrigeration is used at many stages of food production, this is known as a Cold Chain. Using refrigeration at each stage ensures that products are preserved safely between cultivation and your plate. Chilling, freezing and storing food is a substantial industry.
Have you ever wondered how your fridge works to keep things cold? Refrigerators use the principles of pressure, boiling and evaporating of a fluid in a circuit in the refrigeration pipework to remove heat and reduce the temperature inside the fridge..
Can you guess where refrigeration is used?
The average fridge in your home uses electricity to power its motor (the compressor). You will see Energy Labels on fridges that tell you how efficient they are...