what is the proper definition for thermal expansion??
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Thermal expansion is the tendency of matter to change its shape, area, and volume in response to a change in temperature. Temperature is a monotonic function of the average molecular kinetic energy of a substance. When a substance is heated, the kinetic energy of its molecules increases.
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Hey there!
The expansion or change in shape, area or volume of the of matter due to heat is called Thermal Expansion.
The word thermal means relating to temperature.
When there is change in length of substance due to heat, it is called Linear Expansion.
When there is change in area of substance due to heat, it is called Superficial Expansion.
When there is change in volume of substance due to heat, it is called Cubical Expansion.
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