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grace1117
grace1117 asks:
Q:

Why does the alcohol-water mixture in the homemade thermometer rise up when the surface inside the bottle is hot?

In Topics: Science fair
> 60 days ago

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Expert

greenprof2
Oct 11, 2012
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What the Expert Says:

Hi Grace -
That is because heat represents the energy absorbed by the liquid, and energy makes the particles in the liquid - the molecules - move faster. Faster moving particles require more space and the liquid responds by expanding.

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