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Chapter 6 : Earth Physics

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    Science Y7 [Unit 6.1 Sound waves - 6.2 Reflection of sound]
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  • The pitch of a sound is directly related to the sound's _______.
    frequency
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  • The loudness of a sound is directly related to the wave's _____.
    amplitude
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  • Sound waves will transfer fastest through _______.
    solids
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  • Sound waves is produced by ______________.
    vibration of an object.
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  • [T/F] : Sound travels the FASTEST through air.
    False
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  • High frequency = _______ Pitch
    High
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  • The ______ of a sound depends on the medium through which it's moving.
    speed
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  • Will a LOUD sound will have a high or low amplitude?
    High amplitude
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  • Which travels faster, light or sound?
    Light
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  • Will sound be absorbed or reflected by these objects: brick, concrete, glass, tile, wood
    Reflected
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  • Will sound be reflected or absorbed by these objects: hair, cotton, carpet, flag, pillow
    Absorbed
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  • What shape does sound travel in?
    waves
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  • Why will sound echo in an empty room? explain your answer.
    Yes, because there are only hard surfaces so sound only reflects.
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  • When Qi Zhe yells his name in a cave, the sound reflects off the walls of the cave and travels back to his ears. What is this sound called?
    echo
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  • [T/F] : Sound travels through a vacuum
    False
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  • Using particle theory, explain the speed of sound in solid and in gas medium.
    solid particle closely pack together, the transfer the vibration faster than in other medium. Gas particles are far way from one another., transfer slower.
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