A thermometer is an instrument used to measure temperature. It consists of a small graduated scale with numbers indicating different temperature values, and a bulb or sensor placed in the object or environment whose temperature is desired to be known.
The bulb contains a substance sensitive to heat, such as mercury or alcohol, which expands or contracts according to the temperature, moving a column or marker on the scale.
In this way, the thermometer allows us to determine how much heat or cold is present in a location, serving as a useful tool in various fields such as meteorology, medicine, and industry.
