Breathing on a cold window can cause it to fog up. which change of state causes this

When you breathe on a cold window and it fogs up, that change of state is called: Condensation.

Condensation is: The process in which molecules of a gas slow down, come together, and form a liquid water that collects as droplets on a cold surface when humid air is in contact with it.

I know this because I learned it in science class in school.

Hope I helped!

- Debbie

Ifeel like lily and ledbetter had a fair pay act just because it was necessary especially at those times

Inner peace.. jk it's  a stable electron configuration