Solids and liquids have both mass and volume, but a gas has only mass.

What are the 4 phases of matter in order of increasing engery content?

This drawing shows a human body system. what is the primary function of this body system?

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