12 Dec TIMSS - Production and Behaviour of Sound

Presentation

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Science

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6th Grade

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Practice Problem

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Easy

Fong I Lou

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4 Slides • 3 Questions

Production and Behaviour of Sound

12th December 2022

Objectives

Some text here about the topic of discussion

relate common physical phenomena (i.e. vibrating objects and echoes) to the production and behaviour of sound

聲音的傳遞

簡單來說，聲音就是「有東西在振動」
振動會產生聲波並透過介質（固體、液體、氣體）傳播，進而被人體所感知。
聲音傳播的速度是：（最快）固體＞液體＞氣體（最慢）

音反射

聲波在行進中遇到障礙物（例如牆壁）無法被吸收時就會被反彈
過大或過多的反射音就會形成「迴音」
當屋內都是剛性材質（玻璃或磚牆）而少有吸音材質時最容易有此現象。

Fill in the Blanks

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Multiple Choice

敲打哪一塊屬片會發出較高音?

紅色

黃色

綠色

紫色

Multiple Choice

小美有四支金屬棒，她敲打其中兩支。如果第二支所發出的音調比第一支所發出的高，小美敲打的是哪兩支金屬棒？

第一支: A

第二支: B

第一支: B

第二支: C

第一支: C

第二支: D

第一支: D

第二支: A

Production and Behaviour of Sound

12th December 2022

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