Light can be reflected by a mirror, refracted by a lens, or absorbed by an object. These grade level performance standards are listed developmentally. However, each school is uniquely organized. Materials can be changed between states of matter by heating or cooling. Materials may be made up of parts that are too small to be seen without magnification.
Materials can change chemically and physically.
The pitch of sound can be varied by changing the rate of vibration. Light, Heat, Electricity and Magnetism Electrical circuits require a complete loop through which an electrical current can pass. Electricity in circuits can produce light, heat, sound, movement, and magnetic effects. These grade level performance standards are listed developmentally. However, each school is uniquely organized.