2
Question
Solids expand on _________, and contract on ________.
Solids expand on _________, and contract on ________.
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Solution
The correct option is A heating, cooling
On heating, solids and liquids expand in terms of size and volume. This is because on heating, their molecules or particles gain energy and become more active. Hence, they start to move around quickly thereby increasing the size. On cooling, the reverse phenomenon happens. The active molecules or particles of the matter become passive thereby decreasing the size.
On heating, solids and liquids expand in terms of size and volume. This is because on heating, their molecules or particles gain energy and become more active. Hence, they start to move around quickly thereby increasing the size. On cooling, the reverse phenomenon happens. The active molecules or particles of the matter become passive thereby decreasing the size.
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