It's either Mercury or colored alcohol. They're used because they expand in warmer temperatures, and contract in cooler temperatures, resulting in the rising and falling of the red line in your thermometer.
To find the temperature
A thermometer which is used to measure the body temperature
it takes temperature, many used to check inner bumhole levels
its a type of thermometre.....which checks measuring the temperature of ovens and freezers.
Thermometer
The red liquid in a thermometre could either be alcohol, dyed red; or a substance called mercury, which is very toxic. Hope I helped :)
The red line on a thermometer is the line that indicates what the thermometer is set to. If the red line is on 75, then the heat or the air will run until the temperature in the room gets to 75.
The water thermometer, or the thermoscope, was invented by Galileo Galilei. It was based on the idea that the density of a liquid changes with the temperature.
Put it in a vacuum chamber so that it doesn't loose heat that quickly to the environment and prick it with a needle thermometre.
a temperature line is a line of temperature
well many women just stick their hand in.But i prefere a thermometre
usually mercury