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Objective: To measure body temperature.

Range: about 35℃ to 42℃

Special structure: there is a neck at the lower end.

Liquid material: mercury

Usage: Hold the upper part of the thermometer and yank it downward to let the mercury that has risen into the tube return to the glass bulb. Other thermometers must not shake, and the most important thing is to leave the human body for reading, which is a big difference between thermometers and other liquid thermometers.

Second, the experimental thermometer

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Purpose: To measure liquid temperature in laboratory.

Range: about -20℃ to 1 10℃

Special structure: no necking at the lower end

Liquid substance: alcohol or kerosene, add red liquid.

How to use:

Observe the thermometer to be used and know its measuring range (measuring range) and dividing value (temperature value corresponding to each battery); ?

1, estimate the temperature of the measured liquid before measurement; ? Choose a thermometer with appropriate range according to the expected temperature.

2. When measuring, make the glass bulb of the thermometer fully contact with the measured liquid (to be immersed in the measured liquid); ?

3. Read again after the indicator is stable; The line of sight should be parallel to the upper surface of the liquid column?

4. When reading, the glass bulb of the thermometer should be left in the liquid to be measured, and no reading can be taken. ?