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How does heat travel?
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Heat can travel in three main ways. If one end of a metal bar is heated, its atoms vibrate more vigorously. The 'hot' atoms nudge their neighbours, and heat travels along the bar by conduction. In a gas or liquid, heated areas expand and become less dense. As they rise, cool gas or liquid moves in to take their place, with the result that the heat circulates by convection. Objects also radiate, or give off, heat. | | Heat makes atoms and molecules vibrate faster and allows heat to move by conduction. |
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Previous:
Back
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Book:
1001
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Section:
Science and Technology
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Chapter:
Heat and Light
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