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Expansion of Solids

Expansion dur...

Question

Expansion during heating:

A

Occurs only in solids

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B

Increases the weight of a material

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C

Decreases the density of a material

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D

Occurs at the same rate for all liquids and solids

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Solution

The correct option is C
Decreases the density of a material

Solids, liquids and gases all expand on being heated.
We know, $d e n s i t y = \frac{m a s s}{v o l u m e}$ .
On heating, the material expands and thus it's volume increases. Increase in volume decreases the density of the material.
Therefore, expansion during heating decreases the density of the material.

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