Measurement of Temperature

Measurements of Temperature is a physical quantity and hence, measurable. In fact in SI system, temperature is a fundamental physical quantity.

By our bodily sensation, we can say which object is hot and which is cold. But such a decision about temperature is not reliable. For example, place your right hand in hot water and left hand in cold water. After a few minutes, place both of your hands in water at room temperature. Now the same water appears cold for right hand and hot for left hand.

Measurement of temperature is a very important factor in various scientific experiments. The science of measurement of temperature is known as thermometry. The devices used to measure temperatures are known as thermometers

Heat and Temperature -

Heat energy is present in every object above absolute zero. How do we know that heat is present in every object? Temperature of the body is an indication.

(Absolute zero is the lowest temperature possible and is equal to -273^oC).

Are heat and temperature one and the same?

No. They are different. Heat is a form of energy and temperature represents the degree of hotness of a body. We can say, 'Heat is the cause and temperature is the effect'.

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