Heat and Temperature


Temperature and Heat I - Concepts
Class - 7th CBSE Subjects
 
 
Concept Explanation
 

Heat and Temperature

Heat is the transfer of energy from a hot body.

The sense of touch can be used to understand the degree of hotness or coldness of something. But the sense of touch is not reliable and cannot be always used to say how much hot anything is. Moreover, using the sense of touch can be risky in case of something very hot. Thus, hotness of anything is measured in terms of Temperature in reliable way. To measure temperature a device called Thermometer is used.

  • Temperature:  Temperature is defined as the degree of hotness or coldness of a given body or an environment.
  • Thermometer: A device used for measuring temperature of any object/body.
  • Unit of heat: There are three units which are used to measure the temperature. Degree Celsius, Fahrenheit and Kelvin.
  • Degree Celsius: Degree Celsius is written as °C and read as degree Celsius.
  • Fahrenheit: Fahrenheit is written as °F and read as degree Fahrenheit.
  • Kelvin: Kelvin is written as K. For example 100 K; it is read as hundred Kelvin.
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    Sample Questions
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    Question : 1

    The measure of how hot or cold something is _____________

    Right Option : C
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    Question : 2

    __________________ a device used for measuring temperature of any body.

    Right Option : A
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    Explanation
    Question : 3

    Temperature is measured by ________ .

    Right Option : B
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    Explanation
     
     
     


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