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The best example of heat transfer by convection is when
A. sunlight warms soil
B. a ceiling fan blows air
C. heat rises from a chimney
A). Heat travels from the sun to the soil by radiation.
B). A ceiling fan moving air around doesn't say anything about heat.
C). It's not heat rising from a chimney. It's heated air. Whenever you see a heated substance rising through some of the same substance that's cooler, you're seeing convection.
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