4.1 Types of Thermometers

Last updated at May 3, 2026 by

What are Thermometers?

They are devices used to measure temperature .

Key Facts and Examples
  • Clinical thermometers measure body temperature accurately.
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Scene — 4.1 Types of Thermometers

Example: Doctor uses clinical thermometre to check fever
  • Room thermometers measure ambient air temperature .
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Scene — 4.1 Types of Thermometers

Example: Wall thermometre shows room temperature as 25°C
  • Maximum-minimum thermometers record daily temperature extremes .
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Scene — 4.1 Types of Thermometers

Example: Weather station uses these to track hottest and coldest temperatures
  • Normal human body temperature is 37°C .
Example: Healthy person's temperature reads 37°C on clinical thermometer
Types of Thermometers Clinical Body temperature - 37°C normal Room Ambient air temperature Max-Min Daily temperature records

Activity 7.5: Measuring Water Temperature at Different Stages (Page 7)

What you need:

  • Thermometer
  • Water from tap
  • Beaker or container
  • Heat source (stove or burner)

What to do:

  • Step 1: Use a thermometre to measure the temperature of cold water from tap
  • Step 2: Measure water temperature after standing in room
  • Step 3: Measure warm water temperature
  • Step 4: Measure temperature of water near boiling
  • Step 5: Record your observations and note how the thermometre reading rises as heat is added

Observations

What you see:

Water Stage Temperature Reading Observation
Cold tap water 15-20°C Lowest reading
Room temperature water 25-30°C Moderate reading
Warm water 40-50°C Higher reading
Near boiling water 90-95°C Highest reading

Why this happens:

We have studied that thermometers are devices that measure temperature . This is why the reading rises as heat is added .

  • More heat means higher temperature
  • Thermometre responds to temperature changes
Temperature Measurement Process Cold Water 15-20°C - lowest reading Room Temperature 25-30°C - moderate reading Warm Water 40-50°C - higher reading Near Boiling 90-95°C - highest reading Heat increases temperature!

Section Summary: Measuring Temperature

Measuring Temperature Summary Thermometers Devices measure temperature Clinical Type Body temperature 37°C Room Type Ambient air temperature Max-Min Type Daily temperature records Activity Results Heat increases readings
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