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: You must be very careful with '''thermometers''' because they are usually made of [[glass]] which can break and cut you.
: Most thermometers have a range of [[Temperature|temperatures]] they can measure and some [[Temperature|temperatures]] they can't. If you put a [[glass]] '''thermometer''' in a fire it will [[Melting|melt]].
: A '''thermometer''' can show a negative [[temperature]] because the Celcius Celsius scale was chosen to have water freezing as 0 degrees CelciusCelsius. So anything colder than freezing water is given a negative [[temperature]].
===Examples===