ch.2 & ch.4 revision - CL.5A

We use electricity everyday, it is

( ) in our daily life.

What is used to measure the loudness of sound?

• Decibel

• Kilogram

• Metre

• Litre

A magnetic force is produced when we ( ) an iron nail with an electric wire and connect it to a battery.

An ( ) is produced when sound reflects from an object during sound transmission.

When the short bar on a xylophone is hit, the pitch is

( ).

• Higher

• Lower

When a glass that is full of water is hit with a spoon, the pitch is

( ).

• higher

• lower

Fluorescent bulbs have a longer lifespan and are more energy-efficient that LED bulbs.

• True

• False

Soft materials ( ) sound.

Motors make use of ( ) to work.

What does an electronic tablet (iPad) mainly produce? [more than one answer]

• Sound

• Motion

• Heat

• Light

• Motion