Why does the smoke always rises up?

Smoke is hot air. Therefore, hot air always rises up because hot air is lighter than cool air.
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smoke always rises up because it is a heated gas and always heated gas is lighter than colder gas so smoke being very lighter rises up
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short answer:
  A fire makes things hot. Above a fire, you get quite a lot of hot air. Hot air is less dense than cool air, so it rises. long answer: A fire makes things hot. Above a fire, you get quite a lot of hot air. Hot air is less dense than cool air, so it rises. Because there is quite a lot of hot air, it makes quite a big wind current as it rises, and that drags the smoke particles upward with the air, in much the same way as wind can raise dust. Some of the smoke particles are very small indeed, so they can be held up in the air for quite a long time, and they do not settle out from the air until a long time after they leave the fire, and usually some distance away from the fire. hope you find some help!
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smoke always rises up always as it is warm air and warm air is lighter than cold air
 
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Hot air is lighter as compared to cold air.
When we burn something, the air above the fire gets hot. It rises up. As fire produces smoke, so the hot air which is rising up carries that smoke with itself.

Hope this answer will help you.
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It is warm and light
  • 0
 hot air rises up. smoke is also hot air released after a reaction which is lighter than the normal air hence goes up.
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because smoke is lighter being hot so it rises up
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Smoke is hot and therefore lighter than cool air.Hence low pressure is created and the smoke rises up. 
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Smoke always rises up because it is less denser than air. 
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It is because smoke is lighter than air . 
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hot air is less dense than cool air, so it rises
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A fire makes things hot. Therefore the temperature of smoke is higher than th atmosphere and as hot air rises up smoke too rises into the air.
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smoke always rises up because smoke is a hot air , and we know that hot air rises up so smoke always rises
 
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because it is lighter than air
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because it is very lighter and very dense than air
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Smoke always rises up because it is hot.Hot air always rises up as it is lighter
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 As fire is hot the gas that is smoke is also hot and it is obvious that hot air is lighter than cold air that's why smoke rises up.
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Because smoke is lighter than air
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