8. Warm air is dense than cold air and rises creating convection currents. ​

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Answer:

Hot air rises because it is less dense than cold air, so air will rise above a heater and sink near a cold window. Forced convection refers to fluids being pushed around by outside forces. A fan or a pump are forms of forced convection, which is very useful for moving heat from one place to another.

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Answer:

Correct

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