energy is caused by the movement of atoms and molecules. A. Heat B. Light C. Chemical D. Electrical

Which of the following is a testable hypothesis? a. if i brush my teeth, i will get fewer cavities than if i don't brush my teeth. b. green toothpaste tastes better than blue toothpaste or red toothpaste. c. smart, careful, healthy people always brush their teeth. d. it's wrong to not brush your teeth before you have an important conversation with someone.

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.