Which of the following are part of kinetic-molecular theory? Check all that apply.

Kinetic-molecular theory says particles are always moving, though their motion differs by state. Liquid particles move past one another, while gas particles move freely in all directions and have few attractions between them. Solid particles are not motionless or far apart; they vibrate around fixed positions. Therefore, the correct statements are that liquid particles move past one another, gas particles move freely and have few attractions, solid particles vibrate in fixed positions, and particles in all states are always moving.

AI-written and checked against the verified answer.