Why Does Hot Air Rise And Cold Air Sink
Camila Farah
Colder fluids are more sense and fall.
Cold air is more dense than hot air. This is called a convection current. The sun warms the surface of the earth and by conduction and convection some of that heat is transferred to the air which is closest to the ground. It is wrong to say that cold air sinks and hot air rises because it doesn t.
It rises because denser cold air around the bottom of the chimney is under higher pressure than the cold air at the top of the chimney. The extra pressure due to a chimney height of cold air is pushing it down. But this is only true in a gravitational field where there is a distinction. This is the principle in hot air balloons as the air in the balloon is lighter as it is hotter than the air around it meaning it will rise.
Because of this the molecules in hot air tend to be further apart on average giving hot air a lower density. The molecules in hot air are moving faster than the molecules in cold air. What the observation that hot air rises and cold air sinks is really saying is that denser air will sink and less dense air will rise. See answer carissatrussell21 is waiting for your help.
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It causes convection currents because there is hot air and cold air the hot air will will rise and the cold air will sink. How does uneven heating of earth s surface cause convection currents. Hotter fluids are less dense and rise. As hot air cools it sinks back to the surface of the earth where it gets warmed by the ocean only to rise again.
As the cold air sinks the hot air rises through it because the hot air particles vibrate they create more space between them the cold air particles are grouped closer together though. So since cold air weighs more it sinks driving the hot air up. Hot air has more potential energy than cold air. Hot air is more dense than cold air.
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