Present an overview of conductors and insulators by using Presentation 3: Electrical conductors and insulators.
Learners will investigate the types of materials that can be used in electric circuits.
Different objects: teacher can select 10 items/ allow groups to choose/ add other objects:
pen, cardboard, metal paper clip, paper clips covered with plastic, elastic band, copper coins, silver coins, glass, metal spoon, chalk, steel wool, drinking straw, chalk, rubber, piece of wood, pencil, drawing pin, scissors, etc.
Each group gets a bulb, two pieces of electric wire and a battery.
Work in pairs/ groups of 6-8.
Encourage the learners to communicate softly while investigating.
Each group must first write down a hypothesis of the materials that they think would conduct electricity.
A scribe must complete Worksheet B of the objects that make the bulb light up and the objects that do not make the bulb light up.
Learners must be able to conclude that conductors are normally metals.
Allow the learners 20 minutes to complete the activity.
This will help the learners understand that certain materials conduct electricity more easily than others.
Emphasize the proper position of holding an object that is being tested.
Remind learners that it is important to record their findings correctly on Worksheet B.
Learner Activity 3
Hand out Worksheet B: The conductivity of different types of materials.
Explain that the questions in the worksheet are based on their investigation.
Let learners complete the worksheet.
Teacher to use WORKSHEET B: Memorandum to mark the learners’ work.