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Physical Science

Reading Levels These books contain three developmentally appropriate reading levels for each grade span.

Low
Mid
High

Each level of the book conveys similar concepts, images, and vocabulary.

Electricity and Magnetism

© blueringmedia /123RF

Electricity and Magnetism

Electricity and magnetism are integral to the workings of nearly every gadget, appliance, vehicle, and machine we use. This unit explains electricity, from charged particles at the atomic level to the current that flows in homes and businesses. There are two kinds of electricity: static electricity and electric currents. There are also two kinds of electric currents: direct (DC) and alternating (AC). Electricity and magnetism are closely related. Flowing electrons produce a magnetic field, and spinning magnets cause an electric current to flow. Electromagnetism is the interaction of these two important forces.

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