Underline the correct answer inside the parenthesis to complete the sentence.
1.) The Universe is made up of matter and (friction, energy).
2.) Sound energy is a form of energy associated with the (bouncing, vibration) of matter.
3.) Electrical Energy is a form of energy that is produced when electrons (move, at rest) from one place to another.
4.) Potential energy is the energy that is stored in an (object at rest, object at motion) or associated with position.
5.) Light energy travels in (waves, road).