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TRUE or FALSE? Trapping the sound vibrations makes the sounds louder.
True
what does 'dB' stand for?
decibel
how loud or soft a sound is.
volume
a machine for measuring the volume of sounds.
sound level meter
the unit for measuring the volume of sounds.
decibel
Why are some sounds loud and the others soft?
vibrations
Is an ambulance loud or soft sound?
loud
Is a whisper loud or soft sound?
soft
Small vibrations make ................... sound.
soft
Big vibrations make ................... sound.
loud
Give me one example of loud sound
done
Give me one example of soft sound
done
Sounds .................. (always / sometimes) come from sources.
always
Sounds .............. through from solids, liquids and gases. (travel / vibrate / make / play)
vibrate
True or False: Sounds travels because vibrations travel.
True
True or FalseL Vibrations move from the vibrating object through materials.
True
Sounds travel because vibrations ................. (travel / vibrate)
travel
Object vibrates make a ....................
sound
Which materials does the sound travel in the string telephone?
a string
What is the source of sound in the string telephone?
a speaker's voice
Which material does the sound best go through? (sollids / liquids / air)
solids
To shake very quickly back and forth.
vibrate
A very small movement backwards and forwards
vibration
To move from one place to another.
travel
Where something comes from.
source
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