What happens when an electron moves from the first energy level to the second?

After cloud droplets form, what must happen to them for precipitation to occur?

Stage in which a star’s outer layers have started to cool and grow outward?

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out