In this unit, students explore magnets, electromagnets, and motors. Through their experiences, students are introduced to the following concepts, skills, and attitudes.

• Magnets attract and repel each other; this attracting and repelling can be used to cause motion.
• A compass can be constructed by suspending a magnet so that it is free to rotate.
• A compass will move in response to a magnet that is placed near it.
• An electric current moving through a wire produces magnetism; a coil of copper wire conducting an electric current becomes an electromagnet.
• A steel bolt placed inside a coil of wire conducting an electric current increases the strength of the electromagnet.
• A simple motor can be made from an electromagnet and a rotating armature.
• An electric current can be generated by placing a rotating coil of wire near a magnet.

Skills

• Observing, describing, and recording the results of experiments.
• Learning to plan and conduct experiments in which variables are controlled.
• Predicting and testing how changing a variable affects the outcome of an experiment.
• Interpreting the results of experiments to draw conclusions.
• Applying troubleshooting strategies to investigations with compasses, electromagnets, and motors.
• Reading and researching to learn more about electricity and motors.
• Communicating results through writing, drawing, and discussion.

Attitudes

• Developing an interest in experimenting with the technology of motors.
• Appreciating advances made in the use of magnets, electricity, and motors.
• Recognizing the importance of validating results through repeated testing.