Mercury and Alcohol are used in the thermometer because they remain in liquid form with temperature change . Even a small change in temperature changes the volume of the Alcohol or Mercury. By calculating the expansion of the liquid, the temperature is measured.
In a mercury thermometer , a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.
The correct answer is Mercury. Mercury is used in thermometers because it remains in liquid form throughout a wide range of temperatures i.e -37.89 degrees Fahrenheit to 674.06 degrees Fahrenheit.
Temperature is a degree of hotness or coldness the can be measured using a thermometer. It's also a measure of how fast the atoms and molecules of a substance are moving . Temperature is measured in degrees on the Fahrenheit, Celsius, and Kelvin scales.
Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion . Hence, the slightest change in temperature is notable when it's used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.