Natural Sciences Grade 9 Term 4

The temperature of a star determines it's colour.

• True

• False

A system that generates electricity.

• gravitational force

• power surge

• fuse

• power station

What is Eskom responsible for?

• generation of electricity

• transmission over a long dsitacne

• distribution to consumers

• earning of money

Which one is not a type of wire?

• live wire

• round wire

• neutral wire

• earth wire

What is the unit of measurement for electricity transferred?

• MW

• kW

• GW

• mW

A force is a push or pull action.

• True

• False

Stars that look red are the hotter and usually younger than stars that appear blue white.

• True

• False

For a current to flow, what is required?

• a source of energy

• electricity

• closed circuit

• open circuit

The national electricity network in South Africa is _____

A circuit breaker trips as soon as the current is greater than _____

• 30A

• 60A

• 90A

• 110A