Where do the air bubbles on the bottom come from when you boil water?

Question

Where do the air bubbles on the bottom come from when you boil water?

In: 42

Answer 1

boiling is a bulk phenomenon so the water on the lowest surface first heats up, due to it the water starts to expand turning water into water vapor then as the density of the water is higher than the water vapor so the vapor moves above the surface of the liquid water

water vapor (steam) is more energetic (heat) and could cause more damage to your skin than a boiling water

(it doesn’t happen when evaporate cause it is a surface phenomenon the water only on surface will turn into water vapor)