- Show magnetic attraction and repulsion. Make and use a
- Explain the difference between a direct current and an
alternating current. Tell the common uses of each.
- Make a simple drawing to show how a chemical cell and
an electric bell work.
- Explain why a fuse blows or a circuit breaker trips.
Tell how to find a blown fuse or tripped circuit
breaker in your home. Show how to change the fuse or
reset the circuit breaker safely.
- Explain what overloading an electric circuit means.
Tell what you have done to make sure your home circuits
- Fix a bad cord on an appliance or a plug.
- Show on a floor plan of a room in your home. Show first
aid if the person is unconscious from electrical shock.
- Show on a floor plan of a room in your home the lights,
switches, and outlets. Show which fuse or circuit
breaker protects each.
- Read an electric meter. Figure an electric bill from
- Explain 10 electrical terms such as volt, ampere, watt,
ohm, resistance, potential difference, rectifier,
rheostat, conductor, ground, circuit, or short circuit.
- Do any TWO of the following:
- Connect a buzzer, bell or light with a battery.
Have a key or switch in the line.
- Make and run a simple electric motor (not from a
- Build a simple rheostat. Show that it works.
- Build a single-pole double-throw switch. Show that
- Hook a model electric train layout to a house
circuit. Tell how it works.