Keyword Analysis & Research: hot air sinks and cold air rises


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Why does warm air rise and cold air sink?

Conventional knowledge has it that warm air rises while cold air sinks. But a study from the University of California, Davis, found that in the tropical atmosphere, cold air rises due to an overlooked effect — the lightness of water vapor. This effect helps to stabilize tropical climates and buffer some of the impacts of a warming climate.

Why does hot air rise?

The main reason that hot air rises is because sinking cold air pushes it up. However, other things like mountain slopes can also cause hot air to rise. When any substance is hot, its molecules are farther apart than when it is cold, reports History for Kids. This makes hot air less dense than cold air and lighter per cubed square foot.

Why does the upper story feel hotter than the downstairs?

If you own a multi-story home, then you must’ve noticed that the upper story feels much hotter than the downstairs. This is because cold air sinks. Cooler air is denser, hence heavier since the molecule bonds absorb lesser energy than hot air. That is why cold air stays closer to the surface.

Does warm air rise or sink in the tropics?

Sometimes, cool air rises and warm air sinks — and that helps the tropics cool off. You may have once learned that "warm air rises, and cool air sinks." But that doesn't always hold true.

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