
國中自然2上ch3-2聲音的形成
Authored by 翰林出版國中自然 翰林出版國中自然
Biology
8th Grade
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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
下列關於聲波的敘述,何項正確?
聲波的振動形式為橫波
發音體的週期增大,則聲音在空氣中的速度變大
聲波在空氣中的傳播速度大於其在水中的傳播速度
在氣溫30℃時,聲波在空氣中的速度大於其在氣溫10℃時的速度
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
下列有關聲波的敘述,何者正確?
聲波的傳遞過程一定要有介質
凡是物體發生振動,人耳一定可聽到聲音
講話講得愈快,聲速愈快
水上芭蕾舞者潛入水中時,無法聽到觀眾的掌聲
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
大熱天在開著冷氣的教室內唱歌,當歌聲自教室傳到室外時,聲音的速率將如何變化?
變快
變慢
不變
不一定
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
如欲製成一氣密式隔音窗戶,在兩片玻璃中間應如何處理,隔音效果最佳?
填入壓克力
塞入保麗龍
貼上具防爆隔熱性質的貼紙
抽成真空
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
下列何種現象可證明物體發出聲音,是由於物體振動的關係?
鼓面上的米粒會因鼓被敲打而發出聲音時,米粒隨著鼓面的振動而上下跳動
撥動橡皮筋時,橡皮筋來回振動而發聲
蚊子展翅而飛時所發出的聲音
以上皆是
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
當一個人面向西邊喊叫時,哪邊的空氣在振動?
西邊
東邊與西邊
東邊、南邊、北邊
四面八方都有
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
英國科學家波以耳曾經作了有名的鐘罩實驗,當抽氣機將鐘罩內的氣體抽光時,將無法聽見電鈴的聲音,則此實驗可獲得下列哪一項結論?
介質振動的愈快,聲音的頻率愈高
物體必須迅速的振動才能產生聲音
必須有傳聲介質才能聽見聲音
振動的幅度愈大,聲音愈大聲
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