Plucking, hitting, blowing and shaking are some ways to make things ..... and produce sounds.

...... in our voice-box vibrate and make sounds when we talk or sing.

Vibrations from the sources of sound travel through materials to our .....

Sounds can travel through air, liquids and solids.

Small vibrations produce ........

Large vibrations produce .......

A soft sound has a ........ and sound level.

A loud sound has a ...... and sound level.

Sound levels are measured in the unit ........

A ........... can be used to measure sound levels.

Unwanted sounds are called ......

We can wear ear defenders such as ......... to keep out noise and protect our ears.

These are some other ways to keep out noise:

These are some other ways to keep out noise:

A high-pitched sound is made when...........

A low-pitched sound is made when ........

...... is different from loudness or volume.

A loud or soft sound can be high-pitched or low-pitched

... make sounds when the strings vibrate.

Thicker, looser and longer strings make higher pitched sounds than thinner, tighter and shorter strings.

....... make sounds when the column of air in the instrument vibrates.

Longer air columns make lower pitched sounds than shorter air columns.

...... make sounds when they are hit or shaken.

A drum makes a higher pitched sound when it has a tighter drum skin.