Sound Y7

A sound wave is produced when an object ......

• accelerates

• decelerates

• vibrates

• remains stationary

Sound travels in air because ......

• air particles stay still.

• the wind blows it.

• particles pass on vibrations.

• electricity sends it through the air.

An echo occurs when a sound wave is ........

• absorbed.

• transmitted.

• refracted.

• reflected.

The pitch of a sound is called the .....

• frequency.

• decibels.

• loudness.

• Hertz.

Sound travels fastest in ....

• a vacuum.

• the sea.

• the atmosphere.

• a broom stick.

An animal that can hear sound frequencies higher than a human child is …

• a human adult.

• a cod fish.

• a bat.

• an eagle.

Hitting a drum harder makes the sound…

• higher.

• lower.

• louder.

• softer.

The part of the ear that the sound wave causes to vibrate is the ....…

• lobe.

• ear drum.

• tiny bones.

• fluid in the cochlea.

Sounds above 20000Hz are called…

• ultracool.

• ultrasound.

• infra-audio.

• infrasound.

Sound can travel through ...

• gasses in space.

• a vacuum.

• solids and liquids only.

• solids, liquids and gasses.