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What happens when air is heated?
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Warm air is lighter than cold air, and so when air is heated it rises. Colder air then rushes in at ground level to take its place. On a small scale, this effect can be seen when the Sun heats up a field and the air above it rises in a thermal; you can often see birds like eagles soaring on these air currents. | | Birds can soar upwards on columns of warm, rising air, called thermals. |
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Previous:
Back
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Book:
1001
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Section:
Earth
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Chapter:
Weather and Climate
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