P.5 GS Unit Quiz(Electricity and daily life)

1. Electrical appliances use electricity to produce _____, _____, ______ and ______.

• motion

• heat

• light

• sound

A hairdryer produces ___ air.

A kettle produces heat to ____ water.

Look at the energy label of the air-conditioner. Grade 1 means ____ efficient.

• more

• less

• not

Look at the energy label of the lamp. Grade 4 means _____ efficient.

• more

• very

• less

Electromagnet can attract metals. Is it correct?

• Yes.

• No.

This is an electromagnetic lock. When electricity is cut off, magnetic force disappears and the door will be _______.

• locked

• unlocked

There are too many symbols on a map. Visitors can't locate facilities on a map.

• A mini vacuum cleaner

• A light-up map

• A smart traffic light

Most vacuum cleaners are too big for cleaning a desk.

• A mini vacuum cleaner

• A light-up map

• A smart traffic light

How are electromagnets used to produce motion?
The wire inside the _______ becomes an electromagnet. It produces motion to make the blades of the fan move.