Electricity

What are atoms made of?

• Electrons, protons and neutrons.

• Electrons and neutrons.

• Protons and neutrons.

• Electrons and protons

Under what conditions do charged objects attract or repel?

• If the charges are the same, they attract. If the charges are opposite, they repel.

• If the charges are the same, they repel. If the charges are opposite, they attract.

What materials let electricity pass through them easily?

• Conductors, such as metals

• Insulators, such as rubber and plastic.

What materials doesn't allow electricity to pass through them easily?

• Conductors, such as metals

• Insulators, such as rubber and plastic

What are the basic parts of an electrical circuit:

• A conductor, a switch and a load.

• A switch and a load.

• A power source, a switch and a load.

• A power source, a conductor, a switch and a load.

In a simple circuit, why does the bulb light, when you close the switch?

• the switch produces electricity.

• closing the switch completes the circuit.

• closing the switch breaks the circuit.

Which materials are electrical conductors?

• Water, plastic, rubber, wood and porcelain.

• Plastic, rubber, wood and porcelain.

• Gold, copper, water, silver and aluminium.

• Wood, copper, water, silver and aluminium

Which materials are insulators?

• Gold, copper, water, silver and aluminium.

• Glass, plastic, rubber, wood and porcelain.

• Gold, copper and glass.

• Glass, plastic, rubber, wood and water.

In a circuit: What does an X with a circle around it mean?

• A power source, such as a battery.

• A conductor, such as a wire.

• A switch

• A load, such as a light bulb.

__________________ conducts electricity.

• Wire

• Light bulbs

• Batteries