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How can raise the pitch on a stringed instrument?
by making the string thinner ,shorter or tighter
If the faster the vibrations, can be the higher the pitch of sound or the lower the pitch of the sound.
the higher the pitch of the sound
What kind of pitch sound can make for thunder?
low- pitched sound
a word for " how high or low a sound is".
pitch
Which materials are good for muffling sound?(hard or soft materials)
soft materials (eg. carpet/curtains)
a word for " to make sounds less and less clear".
muffle
Not to damage ears, what things we need to use?
ear defenders
To muffle the sound of car's engine, which equipment does we need to use?
silencer
Which instrument have to use to measure sound?
a sound level meter
What is the unit for measuring sound?
decibels(dB)
what can cause large vibrations?
loud sounds
a word for " how loud or soft sound".
volume of sound
What can make vibrating objects?
sounds
a word for "move from the vibrating object through materials".
vibrations
How to travel sound?
vibrations
Look at the picture and answer.
air(soft)/water (louder) / wood (loudest)
Which materials is the best to travel sound?
solids
What are the main part of different materials to travel sound?
solids /liquids/ gases
can sound travel through materials?
Yes
a word for "where something comes from"
source


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