Bubble

This page is about gas inside a liquid. For other pages titled "bubble", see Bubble (disambiguation).
A bubble is a globule of one substance in another, usually gas in a liquid. Due to the Marangoni effect, bubbles may remain intact when they reach the surface of the immersive substance. Bubbles appear transparent and contain air or any form of gas inside of it, surrounded by a thin layer of liquid. Bubbles are easily penetrable and can be "popped" by simply touching a physical surface.
Bubbles are typically seen in everyday life. Examples of these include:
* As spontaneous nucleation of supersaturated carbon dioxide in soft drinks
* As water vapor in boiling water
* As air mixed into agitated water, such as below a waterfall
* As sea foam
* As a soap bubble
* As given off in chemical reactions, e.g., baking soda + vinegar
* As a gas trapped in glass during its manufacture
* As the indicator in a spirit level
Category:Bubbles
Category:Science
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Category:Fluid mechanics
Category:Physics