R28.75

Resource Description

Grade 9 Term 3 Natural Sciences Summary

– Powers

– Contact forces

– Non-contact forces: gravitational force

– Non-contact forces: magnetic force

– Electrostatic forces

– Electric cells, resistance and circuits

– Resistance

– Series circuits

– Parallel circuits

– Lighting systems in homes

– Safety with electricity

– Energy and the National Electricity Grid

– Generation of electricity

– The national network

– The cost of electrical power

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