CK-12 Foundation
Ck 12: Physical Science: Electric Fields
Explore what an electric field is and how electric fields interact with this module. Module includes a video, interactive activity, and review questions.
CK-12 Foundation
Ck 12: Physical Science: Magnets
A module that uses pictures, videos, reading passages, and review question to go over what a magnet and magnetic pole are, and how magnetic force is related to magnetic field. This site may require free registration to access all...