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Grade 4 Sound

What are sound waves a result of? vibrations
When will an object no longer produce sound? when it has stopped vibrating
What are the properties of sound? sound travels, sound can be reflected, sound can be absorbed, sound can be modified, sound is caused by vibrations
What are the three things needed for sound to be heard? particles that vibrate, a vibrating object and someone or something to hear the sound
What do vibrating objects send out? sound waves
Can sound waves travel through a vacuum? No
Can sound waves travel through a solid, liquid or a gas like air? Yes
What are sound waves a series of? compression and rarefaction areas travelling through a substance
What is rarefaction? Rarefaction is the reduction of an item's density, the opposite of compression.
Created by: biundo