There are several ways:
thermometer
One can make the bulb containing the liquid thinner to speed up reaction time.
OK basically depending on what thermometer. the glass tube is filled with either alcohol or Mercury. and when it gets hotter, the liquid expands and takes up more space inside the tube. and colder.......the liquid compacts and moves down the tube.....and it's taken years to calabrate the markings on the tube to show the correct reading.
This could describe a thermometer. The only thing missing is the graduations. That way the height of the column can be associated with a specific temperature, the one that caused the column to be as high as it is.
Liquid glass is sodium metasilicate, Na2SiO3. (Wikipedia)
A laboratory thermometer is used to check the temperature, or changes in temperature, of an object with precise accuracy.
what do they use for the liquid in glass ball thermometer
using a thin capillary bore using a thick glass stem
thermometer
Most materials expand with the temperature increases. In this case, the liquid in the thermometer expands faster than the glass that holds it.
A so-called "glass" thermometer has a small bore-hole in the center of the glass that has some liquid in it. It's the activity of the liquid in the narrow hole that makes the thermometer a thermometer.
thermometer
For a classic thermometer: glass and mercury, colored ethanol or another liquid.
the heat makes it expand you see
As the liquid in the thermometer is heated it expands, and the only way the expanding liquid can go is upward. As the liquid in the thermometer cools, it will contract, and the liquid will fall back down into the resevoir, causing the column of liquid to move downward.
Yes, above the mercury or the other liquid.
the heat makes it expand you see