When water boils, the heat converts some of the water to steam and each bubble is a steam bubble. Steam is a gas that is lighter than water, and so the bubbles rise to the surface of the water where the steam is released. As the steam cools in the air, it forms water vapor, and that is what we see. Most people call the vapor "steam", but steam is a transparent gas, like air.
Their heated water molecules that turned into a gas phase and sins gas is less dense than water it causes the bubbles to rise. But normally water gets heated from the bottom of you pot first so that's why bubbles are visible.
When water is heated to or above the boiling point, it turns from a liquid into a colorless gas. The bubbles you see are bubbles of water gas, more commonly called water vapor, escaping to the surface of the boiling water.
Bubbles form because the water is changing form to a gas.
Because there is water vapor and the water that's being boiled is evaporating. In this way, bubbles appear.
The very first bubbles may be dissoved air, but after that, the bubbles are steam,
Because this is nature
It is an event called vaporization.
These bubbles contain air.
Because it just does
Boiling is not as fine a process as it might seem. Evaporation increases gradually until boiling is reached. Boiling occurs when there is sufficient heat to immediately turn the water to its gaseous state. The bubbles you see forming at the bottom of a pot for example are water vapor having been boiled to gas and tend to form at the bottom because that is where it is hotter- near the heating source. You'll see steam coming off of heated water but the bubbles that are forming during boiling are water being turned to gas. Essentially the bubbles are a less intense form of boiling. As you get hotter water the bubbles will form more rapidly and will "boil" as you're more familiar with it.
Bubbles of water vapor
The bubbles are water vapour (ie steam) bubbles, not air. Therefore any heating of water back up to boiling point will renew the process of water vapour bubbles occurring.
Since the bubbles have less density than the surrounding water, gravity pulls the water down, and the bubbles go up.
What you mostly see in the bubbles is steam, which is water in gas form.
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
Water vapor (steam) is inside the bubbles that form inside boiling water. The bubbles that form prior to boiling are mostly dissolved gases escaping from the water.
the bubbles in boiling water is water in a gasious state rising to the surface.
Because it just does
The gas being evaporated forms the bubbles in boiling water.
They are the same. When cold water heats up and bubbles that means it is boiling.
Boiling is not as fine a process as it might seem. Evaporation increases gradually until boiling is reached. Boiling occurs when there is sufficient heat to immediately turn the water to its gaseous state. The bubbles you see forming at the bottom of a pot for example are water vapor having been boiled to gas and tend to form at the bottom because that is where it is hotter- near the heating source. You'll see steam coming off of heated water but the bubbles that are forming during boiling are water being turned to gas. Essentially the bubbles are a less intense form of boiling. As you get hotter water the bubbles will form more rapidly and will "boil" as you're more familiar with it.
These bubbles contain air.
Bubbles of water vapor
If there are big bubbles that pop then it is boiled
no