Sound is caused by?

• waves

• vibrations

• heat

• air

The sound of an aircraft taking off is very?

• quiet

• high

• soft

• loud

The sound of a referees whistle is:

• soft

• high

• low

• quiet

Sound travels in air because

• air particles stay still

• the wind blows it

• particles pass on vibrations

• electricity sends it through the air

The pitch of a sound is

• how high or low it sounds

• how loud or quiet it is

• how much energy it carries

• how long the sound lasts

Frequency is...

• is the height of the waves

• is the number of waves per a second

• is measured in metres

• affects how loud a sound is.

A loud sound is produced by waves with:

• a high pitch

• a high frequency

• a large amplitude

• a small amplitude

Look at these drawings of waves. Which statement is true

• Y has the highest amplitude.

• Y has the longest wavelength.

• X has the highest frequency.

• Y has the highest frequency.

Which statement is not true?

• light and sound both travel as waves.

• sound travels faster than sound.

• light travels faster than sound.

• light and sound can both be reflected

Sound can travel through...

• gases and space

• a vacuum

• solids and liquids only

• solids, liquids and gases