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Sound
Grade 4 Sound
Question | Answer |
---|---|
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. |