Physics
Grade-9
Easy
Question
When the temperature of a substance increases, it ____.
- Expands
- Contracts
- Condenses
- Freezes
Hint:
- Thermal expansion is caused by heating solids, liquids or gases, which makes the particles move faster or vibrate more (for solids).
The correct answer is: Expands
- Thermal expansion is caused by heating solids, liquids or gases, which makes the particles move faster or vibrate more (for solids). This means that the particles take up more space and so the substance expands.
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