Science - Chapter 8.1-8.2

What is the path for electricity to flow called?

an electric circuit

What are some examples of source of electricity and electrical energy?

electric cell and mains socket

What are some examples of devices using electrical energy?

Light bulb and fan

What are some of the examples of wire connecting different parts of the circuit together?

electric wire

What is the energy conversion in a light bulb experiment?

chemical \> electrical \> light & thermal

What are the two conditions needed for electricity to flow?

There is a source of electrical energy in the circuit and is a closed circuit.

True or false: an electric cell is a source of electrical energy

false

True or false: electricity can flow in an open circuit with an electric cell

false

True or false: all nonmetals are electrical insulators

false

True or false: When a switch is open, electricity cannot flow through the circuit

True

What are materials that allow electricity to flow through them called?

electrical conductors

What are the materials that do not allow electricity to flow through them called?

electrical insulators

What are some examples of good electrical conductors?

Metals like copper, aluminium and iron

What is an example of a non metal that is a weak electrical conductor?

graphite

What are electric wires usually made out of and why?

copper, to conduct electricity

What are overhead power lines usually made out of, and why?

aluminium, to conduct electricity

What can be used to open or close a circuit?

A switch

When can a circuit become closed and allow electricity to flow through it?

When the switch is closed