Term 3 Topic 1 Circuit diagrams

• Tell the learners they are now going to have an opportunity to learn how to draw an electric circuit.

• In order to keep a record of an electric circuit that was constructed, it can be drawn or a photo can be taken.

• Show the learners a sketch of a simple circuit with a paperclip switch which was drawn on a chart by the teacher/a learner.

• Inform the learners that scientists have found a way to allow everyone to draw electric circuits using special symbols that represent the components of a circuit.

• The whole world uses these symbols and circuits can be drawn, interpreted, recorded and understood very quickly by people, technicians, scientists and engineers.

• Ask the learners whether they feel confident about drawing an electric circuit.

• Present an overview of drawing simple circuit diagrams by using Presentation 3:

Symbols used for drawing circuit diagrams.

• The learners compare the circuit diagram that they had drawn with the diagrams shown in Presentation 3.
• The teacher encourages the learners to expand their understanding of electric circuits.
• They must follow the instructions below:
  • Circuit components to be used: switch, conducting wire, battery and a bulb.
  • Attention is drawn to the positions of each component in their sketches and the ones of Presentation 3.
  • The components are shifted (battery on top, bulb on the left).
  • Learners get an opportunity to draw their new electric circuit.
  • They are also asked to make a hypothesis of what would happen if the switch is closed.
  • (Possible predictions: no difference, the bulb will light up quicker, the bulb will shine brighter, the bulb will shine duller, etc.).
  • Learners are told to set up their circuits, put the switch on, see whose hypothesis was correct.
  • Conclusion: The position of the components in a simple circuit do not matter. The electric current will be the same in both cases because the bulb (same resistance) and the battery (the same power supply) were not changed.

• Present an overview of circuit diagrams by using Presentation 4: Circuit diagrams.

• Worksheet B: Circuit diagrams.

• Teacher to use WORKSHEET B: Memorandum to mark the learners’ work.

• Tell learners they will be watching a video clip and that they must watch carefully because they will answer a quiz about the video afterwards.

• Learners watch the Video Clip 4: What is electricity. (7:05 min.).

• Learners complete Quiz 2 after they have watched the video clip.

• Teacher to use QUIZ 2: Memorandum to mark the learners’ work.

• Before the last quiz is given, the teacher can show Video Clip 5: Electricity and energy song to the learners.(3:08 min.).

• Learners complete QUIZ 3.
• Teacher to use QUIZ 3: Memorandum to mark the learners’ work.