PW Class 6 Science Notes Chapter 7: Temperature and Its Measurement

When something feels hot or cold, temperature helps describe this condition in a measurable way. Instead of depending only on touch, a thermometer can be used to measure temperature and express it using a temperature scale.

The PW CBSE Class 6 Science Notes Chapter 7: Temperature and Its Measurement cover the meaning of temperature, different types of thermometers, temperature scales, and the measurement of air temperature. Students can use these notes to revise important facts, units, and differences before practising chapter questions.

What Is Temperature?

Temperature is a measure of how hot or cold something is. It is measured using an instrument called a thermometer.

Different thermometers can be used depending on what needs to be measured. For example, one type is used for body temperature, while another is suitable for scientific experiments.

What Are the Different Types of Thermometers?

The chapter notes cover three types of thermometers:

1. Clinical thermometer

2. Laboratory thermometer

3. Infrared thermometer

Each has a different purpose and method of measuring temperature.

1. Clinical Thermometer

A clinical thermometer is used to measure body temperature.

• It is used for measuring human body temperature.

• Normal human body temperature is around 37°C or 98.6°F.

• It is mainly associated with checking whether a person's body temperature is within the normal range.

2. Laboratory Thermometer

A laboratory thermometer is used for scientific purposes and experiments. It measures the temperature of different substances.

Its structure includes:

• A glass tube

• A bulb containing mercury or alcohol

• A Celsius scale marked on the tube

• A scale usually ranging from –10°C to 110°C

3. Infrared Thermometer

An infrared thermometer can measure temperature from a distance without direct contact.

• It is useful for quick temperature checks.

• It does not need to touch the person or object directly.

• Infrared thermometers were especially used during the COVID-19 period.

What Are the Different Temperature Scales?

Temperature can be expressed using different scales. The notes introduce three temperature scales:

• Celsius (°C)

Celsius is a commonly used temperature scale.

• It is represented by °C.

• Normal human body temperature is 37°C.

• Fahrenheit (°F)

The Fahrenheit scale is commonly used in the United States.

• It is represented by °F.

• Normal human body temperature is 98.6°F

• Kelvin (K)

The Kelvin scale is used in scientific experiments.

The formula given for converting Celsius into Kelvin is:

K = °C + 273.15

How Do You Read Small Divisions on a Temperature Scale?

A thermometer scale contains divisions that help determine the temperature reading.

Example: 10 divisions between 0°C and 10°C = 1°C for each small division.

This means that the difference between the two marked temperatures should be considered along with the number of divisions between them when reading the scale.

How Is Air Temperature Measured?

Temperature measurement is not limited to the human body or substances used in experiments. Thermometers can also measure the temperature of the surrounding air.

• Thermometers placed on walls can measure room temperature.

• Such thermometers may be found on the walls of places such as schools or clinics.

• Daily weather reports provide the maximum and minimum air temperatures.

Students can therefore notice temperature measurement in everyday surroundings as well as in weather reports.

Who Was Anna Mani?

The chapter notes mention scientist Anna Mani, who is known as the “Weather Woman of India.” Remembering this name and title can be useful while revising the important facts given in the chapter.

How Do PW Class 6 Science Notes Support Temperature and Its Measurement Revision?

The PW Class 6 Science Notes for Temperature and Its Measurement can help students revise the different thermometers, temperature scales and measurements covered in the chapter without mixing up their uses and values.

• Compare Different Types of Thermometers

Students can revise clinical, laboratory and infrared thermometers together and compare where each one is used. This makes it easier to remember that clinical thermometers measure body temperature, laboratory thermometers are used for scientific purposes, and infrared thermometers can take readings without direct contact.

• Keep Temperature Scales and Values Clear

PW notes can be used to revisit Celsius (°C), Fahrenheit (°F) and Kelvin (K) in one place. Students can also recall the normal human body temperature of 37°C or 98.6°F and the Celsius-to-Kelvin conversion given in the chapter.

• Practise Reading a Thermometer Scale

Students can return to the notes when revising how small divisions on a thermometer are read. For example, when there are 10 divisions between 0°C and 10°C, each small division represents 1°C.

• Revisit Air Temperature and Important Facts

PW notes also help students keep smaller chapter points in revision, such as room temperature, maximum and minimum air temperatures in weather reports, and scientist Anna Mani, known as the “Weather Woman of India.”

Related PW Class 6 Science Resources

• PW Class 6 NCERT Science Solutions

• PW Class 6 Science Most Important Questions

• PW Class 6 Science Sample Papers

• PW Class 6 Science Theory & Notes

The Temperature and Its Measurement chapter explains how temperature is measured in different situations, from checking body temperature to scientific experiments and recording air temperature. PW Class 6 Science Notes can help students keep thermometer types, temperature scales, values and other key facts clear during revision, while related PW resources can be used for textbook and exam practice.