4th Gr. Science Cumulative Review Prt.2

Front

What is an insulator?

Back

An insulator is a material that does not allow electricity to pass through it easily.

Front

Give an example of a good insulator.

Back

Rubber is a good insulator.

Front

What is a conductor?

Back

A conductor is a material that allows electricity or heat to pass through it easily.

Front

Give an example of a good conductor of electricity.

Back

Copper wire is a good conductor of electricity.

Front

What does 'waxing' mean in relation to the moon?

Back

Waxing refers to the phases of the moon in which it appears to be getting larger.

Front

What does 'waning' mean in relation to the moon?

Back

Waning refers to the phases of the moon in which it appears to be getting smaller.

Front

What is an open circuit?

Back

An open circuit is a broken path through which electricity cannot flow.

Front

What is a closed circuit?

Back

A closed circuit is a complete path through which electricity can flow.

Front

Why is copper used in electrical wires?

Back

Copper is used in electrical wires because it is a good conductor of electricity.

Front

Why is plastic used to cover electrical wires?

Back

Plastic is used to cover electrical wires because it is an insulator of electricity.