Some thermometers use mercury, in these the liquid is silvery. Some thermometers use a red dyed alcohol solutioin.
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.
The three main types of thermometers are liquid-in-glass thermometers, digital thermometers, and infrared thermometers. Liquid-in-glass thermometers use a liquid like mercury or alcohol to measure temperature, digital thermometers provide a numeric temperature reading, and infrared thermometers measure temperature from a distance using infrared technology.
If the liquid is silver, it is liquid mercury (Hg). If the liquid is red, it is coloured ethyl alcohol (C2H5OH).
Mercury is used in thermometers.
Mercury in thermometers is in a liquid state, since mercury is liquid at room temperature.
Mercury is a liquid metal used in thermometers. However, it becomes a solid at -37.9 F and it can cause mercury poisoning if ingested or inhaled. Therefore, most theremometers use ethyl-alcohol or a plastic strip covered with liquid crystals (called a liquid crystal thermometer).
Mercury is the element commonly used in liquid-in-glass thermometers.
Such thermometers are based on the fact that the liquid expands when the temperature increases. That's what the thermometers measure.
The liquid in which a thermometer is typically dipped is called mercury. Mercury is commonly used in old-style thermometers, but newer thermometers may use alcohol or other liquids instead.
Liquid in glass thermometers are fragile.For precise work, they need to be recalibrated frequently.
iodine and Mercury