Unit 2 : Sound

Sound is made by .....

• steadiness

• vibration

• stillness

• dullness

Loud volume is made by ... vibrations.

• big

• fast

• slow

• small

Soft volume is made by ... vibrations.

• fast

• big

• small

• slow

High-pitched sound is made by ... vibrations.

• small

• big

• slow

• fast

Low-pitched sound is made by ... vibrations.

• slow

• fast

• big

• small

A guitar produce sound by ... the string.

• plucking

• hitting

• blowing

• tapping

A flute produce sound by ... the flute holes.

• plucking

• hitting

• blowing

• tapping

To make a beautiful sound on guitar, we need to ... the strings.

• unsettle

• mismatch

• dull

• tune

To make different pitches in the flute, we need to ... some holes in the flute.

• close

• open

• cover

• unlocked

The sound that is too loud, we called ...

• air pollution

• water pollution

• noise pollution

• land pollution