SCIENCE REVIEW WORKSHEET# 4:
SOUNDS:

Q1) Write down whether each of these sentences true or false?

• You measure the volume of sound with a loud speaker. (F)
• You play a guitar by plucking the strings. (T)
• Sound only travels through air. (F)
• Sound travels best through solids. (T)

Q2) Describe each sound as high, low, soft or loud.

·         A whisper -soft
·         A bird singing-high
·         A cow mooing-low
·         An ambulance siren-loud

Q3) Fill in the blanks:

• Solid material through which we can hear the best sound.
• Sound waves cannot travel through a vacuum that is why space is silent.
• Whales communicate with each other under water.
• Sounds are made when things vibrate.
• Sound travels because vibrations travel.
• Hand clapping was the loudest sound.
• Trapping the sound vibrations makes the sound louder.
• A whisper is a soft sound.
• A motorbike starting up is a loud sound.
• The aeroplane is a source of sound.
• Fair Test is a test where one variable is changed and all other conditions are kept same.
• The jar vibrates when we hit it.
• Vibrating objects make sounds.
• A vibration is a very quick movement back and forth.
• Sound Level Meter is used to measure sound.
• Loud sound is greater than 85 decibel.
• A sound is louder when vibrations are bigger.
• The unit of sound measurement is decibel.
• The volume of a sound is how loud or soft it is.

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