Air or CO2 bubbles tend to coalese as they rise and are being forced closer together by the containers shape. They can cling to a containers walls and group up as they rise.
Dissolved air bubbles out of the water, as the boiling point of water is reached, water vapour starts to form inside the liquid in the form of bubbles
The gas being evaporated forms the bubbles in boiling water.
The bubbles have air or some other gas in them that is lighter than water.
The water displaces air, which moves to the top. It comes up through the water layer, creating bubbles.
the water is evaporating which pulls the water into a gas and the air bubbles take up at that space, come to the top, and dissappear so if its out long enough the bubbles might go away
bubbles come up
Leaves have gaseous exchange through its stomata or free cell surface (in case of water plants). These gases come out in the form of bubbles in water. Hence air bubbles are formed when leaves are in water.
When a droper is dipped into water and its bulb is pressed air bubbles seems to occur in water because the dropper was filled with air before it was dipped in water and when we press the bulb air comes out forming air bubbles and the space is filled with water .
It can . . . bubbles come from oxygen that is dissolved in the water. Pureness has little to do with it, unless the pure water has simply not been shaken up so as to dissolve oxygen into it.
When you first start to boil water, the bubbles that you see are basically air bubbles. Technically, these are bubbles formed from the dissolved gases that come out of the solution, so if the water is in a different atmosphere, the bubbles would consist of those gases. Under normal conditions, the first bubbles are mostly nitrogen with oxygen and a bit of argon and carbon dioxide. As you continue heating the water, the molecules gain enough energy to transition from the liquid phase to the gaseous phase. These bubbles are water vapor. When you see water at a "rolling boil," the bubbles are entirely water vapor. Water vapor bubbles start to form on nucleation sites, which are often tiny air bubbles, so as water starts to boil, the bubbles consist of a mixture of air and water vapor.
After you spray something with a water based coating you should spray over it with polyurethane. This will make the bubbles not come up and the surface you have just sprayed stay smooth.
Most likely, the water bubbles very much and it might come out of the kettle.