Watch the news. -.-
thermoneter
Temperature is the measure of thermal energy. And how you measure thermometers is that if the liquid expands when its temperature increases. The height of a column of the liquid inside the tube shows the temperature.
Celsius
They had thermometers that were a glass tube with mercury sealed inside. There were temperature markings on the outside of the tube that when the mercury reached that point it showed what the temperature was.
Temperature.
Boiling is way far outside its operating range.
Well it won't work below freezing.
Temperature xD
Temperature itself is not a substance and is not composed of atoms or molecules. However it is a measure of the activity of the atoms or molecules of the substance you are measuring the temperature of. That is, the warmer a substance becomes the more active are its atoms and the higher its temperature.
To measure temperature, scientists use:KelvinCelsiusFahrenheit.
With a tape measure. You asked. Outside to outside, top to bottom.
This measure is the temperature.