Check your progress 4

1) Match up the words in column A with their meanings in column B.

B	A
to make sounds less loud and less clear	volume
where something comes from	vibrate
a unit for measuring sound	source
how high or low a sound is	muffle
how loud or soft a sound is	pitch
to shake very quickly backwards and forwards	decibel

2) Write down whether each of these sentences is true or false.
a: You measure the volume of sound with a loudspeaker.
b: You play a guitar by plucking the strings.
c: Sound only travels through air.
d: Soft materials are better than hard materials for muffling sound.
e: Sound travels best through solids.
3) Look at the pictures of these musical instruments.

a: Which instrument A, B or C can you play by:
i- plucking
ii- hitting
ii- blowing?
b: How can you change the pitch of the note with instrument B?
4) Describe each sound as high, low, soft or loud.
a: A whisper.
b: A bird singing
c: A cow mooing
d: An ambulance siren.
5) Faizah and Halima will use this apparatus to investigate how sound travels through solids, liquids and gases.

a: Which container is full of gas? Which contains a solid and which contains a liquid?
b: Why does each container have to be the same size?
c: What will they use the clock for?
d: How will they collect their evidence?
e: What conclusion will they reach?