人教版八年级物理2-1《声音的产生与传播》专项练习(含答案) (424)
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八年级物理上册《第二章声音的产生与传播》同步练习题及答案(人教版) 一、单选题1.下列关于声音的产生与传播说法正确的是()A.声音都是物体振动产生的B.只有固体可以传播声音C.真空也可以传播声音D.声音在15℃时,在空气中传播的速度是34m/s2.有一根长150米的空心钢管,甲同学在一端敲打钢管一下,乙同学在钢管的另一端可以听到几次响声()A.一次响声B.两次响声C.三次响声D.四次响声3.为了探究声音产生的条件,小明设计了以下选项所示的四个小实验,如图所示,你认为其中不能成探究目的的选项是()A.将正在发声的闹钟放入玻璃罩后慢慢向外抽气B.发出“啊”的声音,同时用手指触摸喉咙处C.敲打铜锣,锣响,同时用手触摸锣面D.将一个正在发声的音叉轻触面颊4.将耳朵贴在长铁管的一端,让另一位同学敲一下铁管的另一端,会听到两个敲打的声音,这个事实说明()A.声波在空气中发生了反射B.声波在铁管中会发生多次反射C.声波在不同介质中传播的速度不同D.敲打铁管在空气中会形成两个不同的声波5.关于声音,下列说法正确的是A.一切发声的物体都在振动B.只要物体在振动,我们就能听到声音C.声音在不同介质中的传播速度相同D.声音在真空中的传播速度为3×108m/s6.太阳上面时时刻刻都在进行剧烈的大爆炸,但是我们却丝毫听不到这巨大的爆炸声,其原因是()A.我们平时没有注意听B.太阳离我们太远了C.真空不能传声D.以上答案都不对7.关于声现象不正确的说法是A.只要物体在振动就一定能听到声音B.听到声音一定有物体在振动C.一般说来声音在固体中比液体中传播得快D.声音的传播要介质8.下列的实验和实例,能说明声音的产生或传播条件的一组是()℃在鼓面上放些碎纸屑,敲鼓时可观察到纸屑在不停地跳动;℃拨打放在真空中的手机,手机显示呼叫号,却听不到铃声;℃人们先看到闪电,隔一段时间才能听到远处的雷声;℃锣发声时用手按住锣,锣声就消失了。
2.1《声音的产生与传播》练习题一.选择题(共20小题)1.下列说法中正确的是()A.只要物体振动,就一定能听到声音B.固体、液体、气体都能传播声音C.宇航员们在月球上也可以直接用口语交谈D.声音在固体、液体中比在空气中传播得慢些2.关于声音的说法,正确的是()A.声音是靠物体的振动产生的B.声音在固体、液体中比在气体中传播的慢C.声音在真空中的传播速度是340m/sD.人耳可以听到任何频率X围的声音3.下列说法错误的是()A.我们听见声音一定有物体在振动B.不振动的物体一定不发出声音C.只要物体振动,就一定能听到声音D.物体振动一定发出声音,但我们不一定听得见4.关于声现象,下列说法中正确的是()A.人说话是靠舌头振动发声的B.声音在不同介质中的传播速度相同C.一切发声物体都在振动D.只要物体在振动,我们人耳就能听到声音5.关于声现象,下列说法中正确的是()A.在真空中听不到声音是因为声音只能在空气中传播B.人说话是靠舌头振动发声的C.只要物体在振动,人耳就能听到声音D.一切发声的物体都在振动6.关于声音的说法,正确的是()A.声音在真空中的传播速度是340m/s B.声音是靠物体的振动产生的C.声音在固体中比在气体中传播的慢D.人耳可以听到任何频率X围的声音7.下列关于声音的产生的说法,正确的是()A.一切正在发声的物体都在振动B.只要物体振动,我们就能听到声音C.物体不振动也能发出声音D.物体的振动停止后,还会发出很弱的声音8.根据所学的声音的产生和传播规律判断,下面说法中正确的是()A.只要有物体的振动和传播的物质,就一定能得到声音B.有声音,就一定有振动的物体C.在声的传播中,声源的位置并没有移动,只是通过介质向外传播波动D.声音是在生物的听觉X围内所能感觉到的一种振动9.关于声现象的描述,下列说法中正确的是()A.声在真空中比在空气中传播的快B.空气中的声速是340m/sC.月球上没有空气,宇航员只能通过无线电交谈D.只要物体振动,人就能听到声音10.下列说法正确的是()A.只要物体振动,我们就能听到声音B.物体停止了振动,我们也能听到很弱的声音C.骨传导方式可以让一部分失去听觉的人听到声音D.耳朵才是接受声音的,牙齿不能传导声音11.一个声源在振动,但人耳却听不到声音,下列说法正确的是()A.一定是声源的振幅太小B.一定是声源和人耳间没有介质传播声音C.一定是声音的频率太低或太高,超出了人的听觉X围D.以上三种情况都有可能12.下列说法正确的是()A.声音能靠一切物质传播,且固体传播声音的速度一般比液体快B.声波的传播速度与介质有关,但在同一种介质中传播速度一定相同C.凡是人听不到的声音都是频率很低的声音D.声音在空气中的传播速度一定是340m/s13.(2011•金平区)在飞机起飞和降落的过程中,机上人员要X口做吞咽动作或咀嚼口香糖;在遇到巨大声响时,要迅速X口,使咽喉管X开或闭嘴同时堵住双耳,以保持鼓膜内外气压的平衡,以防止()A.听小骨损坏B.听觉神经损坏C.鼓膜被震破D.14.如果我们看见物体振动,却听不到声音,下列分析的原因不可能的是()A.物体振幅太小B.物体振动太快C.物体离人太远D.空气不能传播声音15.当自己在嚼饼干时,会感到声音很大,但是站在你旁边的人却感觉不到那么大的声音,这主要是因为()A.自己嚼饼干的位置离耳朵近B.旁边的人离你太远了C.嚼饼干的声音是通过骨传导的D.饼干太干了16.大音乐家贝多芬晚年耳朵听不到声音,他将木棒的一端咬在口中,另一端顶在钢琴上,倾听钢琴的演奏并谱写出了传世之作,这是因为()A.这样就可以使耳朵恢复正常B.钢琴的声音通过空气传向耳朵,引起听觉C.贝多芬利用骨传导的方式听到声音D.贝多芬即使这样,也根本听不到声音17.下列属于骨传导的是()A.振动的音叉放在耳朵附近听音叉的声音B.把耳朵贴在桌面上听手轻轻敲打桌子的声音C.将振动的音叉的尾部抵在牙齿上听音叉的声音D.以上说法都正确18.音乐家贝多芬耳聋后,就用牙咬住木棒的一端,另一端顶在钢琴上来听自己演奏琴声,主要是能过()A.空气B.水C.木棒和骨D.19.初次用收录机把自己的歌声录下,在播放自己录制的磁带的声音好象不是自己的声音,其原因是()A.收录机质量不太好,录制的声音失真B.歌声经录制后转化为电信号,放磁带时是电信号转化为声音C.平时人们听见自己的声音是通过骨骼将声带发出的声音传到内耳的,他与经空气传过来的声音有差别D.录放磁带时,转速不一致20.人发声的频率X围大约为()A.20HZ~1100HZ B.85HZ~20000HZ C.85HZ~1100HZ D.二.填空题(共4小题)21.声音是由物体_________ 产生的,平时我们听到声音主要是通过_________ 传入我们耳朵里面的;音乐家贝多芬耳聋后,就用牙齿咬住木棒的一端,另一端顶在钢琴上来听自己的琴声,他靠的是_________ .22.一个声源2min内振动了720次,它的频率为是_________ Hz,人耳_________ (能/不能)听到该声音;小明同学练声时,发出声音的频率是200Hz,则他的声带每秒钟振动_________ 次.23.声波的频率X围很宽,由10﹣4Hz到l012Hz,但正常人的耳朵只能听到20Hz到_________ Hz之间的声音,低于或高于此频率X围的声音入耳都听不到.请你设想一下,如果人的听力可以听到20Hz以下的声音,我们的听觉世界会发生什么变化?写出一个与此有关的合理的场景:_________ .24.我们感知声音的基本过程:外界传来的声音引起_________ 振动,这种振动经过听小骨及其组织传给_________ ,_________ 把信号传给大脑,这样人们就听到了声音.三.解答题(共6小题)25.(2005•某某)生活中常常有这样的感受和经历:当你吃饼干或者硬而脆的食物时,如果用手捂紧自己的双耳,自己会听到很大的咀嚼声,这说明_________ 能够传声;但是你身旁的同学往往却听不到明显的声音,请从物理学的角度提出一个合理的猜想:_________ .26.叫一位同学蒙住眼睛坐在房间中央,请他安静地坐着不动,也不要把头转动.然后,你拿两枚硬币敲响起来,你所站的位置要总是在他的正前方或者正后方.现在请他说出敲响硬币的地方,他的回答会令你吃惊.例如,声音本发生在房间的这一角,他却会指着完全相反的一角!请你和同学讨论这种现象,想想其中的原因是什么.27.根据声音传播速度和效果的知识,在下列横线上写出对应的原因:(1)夜晚,进行侦察的侦察员为了及早发现情况,常将耳朵贴在大地上倾听远处敌人的人踏地声和车辆的轰鸣声,其原因是_________ 的缘故(2)夜晚,把手表放在枕头下睡觉,隔着枕头能清楚地听到手表的“嘀嗒”声,若把枕头拿掉,反而听不到这种声音,这是因为_________ 的缘故.28.(2012•某某)如图所示为人和一些动物的发声频率、听觉频率的X围信息,试归纳出上述信息的共性特征,井简述其合理性.29.看图说理:(1)观察如图所示,你能得出的结论是_________ ;(2)如果按照如图所示去设计声音传播的实验,图中敲桌面的声音是通过空气传入人耳,还是通过桌子传入人耳,或者两者都有?针对这些疑问,怎样改进实验,使它更完善?30.经过本章的学习,我们知道,人要听清声音,除了听觉系统要正常外,还必须满足下列条件:一定要有正在 _________ 的物体,即发声体.发声体和人耳之间必须有传声的 _________ .发声体振动的 _________ 一定在人的听觉X 围内.声音到达人耳处的响度至少要达到 _________ dB .2.1《声音的产生与传播》练习题参考答案与试题解析一.选择题(共20小题) 1.下列说法中正确的是( ) A . 只要物体振动,就一定能听到声音 B . 固体、液体、气体都能传播声音 C . 宇航员们在月球上也可以直接用口语交谈 D . 声音在固体、液体中比在空气中传播得慢些 考点: 声音的产生;声音的传播条件;声音在不同介质中的传播速度;人耳感知声音的过程及听到声音的条件。
人教版八年级上册物理第二章第1节:声音的产生与传播针对练习(含答案)1 .如图所示,小华将一只正在发声的音叉触及面颊有震感.这个实验是用来探究AA.声音产生的原因B.决定音调的因素C.声音能否在空气中传播D.声音传播是否需要时间2 .决定声音传播速度的是CA.响度B.音调C.传播声音的介质D.音色3 .以下事例中,能够说明声音产生原因的是CA.声波可以清洗钟表B.两名宇航员在太空中不能直接对话C.将正在发声的交叉接触平静水面,在水面上激起水波D.在一根长钢管的一端敲击一次,从另一端可以听到两次敲击声4.我们生活在一个充满声音的世界中,关于声音的下列说法正确的是CA.声音是一种波,它可以在真空中传播B.我们能够辨别不同乐器发出的声音,是因为它们的响度不同C.声音是由于物体的振动产生的D.我们常说声音“震耳欲聋”,是指它的音调很高5.我国目前正在实施“嫦娥一号”登月工程。
假如你以后登上月球后,你所做的那个实验,不能像在地球上一样进行的是DA.用刻度尺测长度B.用放大镜看细小物体C.用平面镜改变光的传播路径D.用小锤敲击音叉可听到音叉发出的声音6.如图所示,用悬挂着的乒乓球接触正在发声的音叉,乒乓球被弹开。
这个实验是我们在学习《声现象》一章时经常做的实验,它说明了AA.发声的音叉正在振动B.声音可以在真空中传播C.声音的传播不需要介质D.声音在空气中的传播速度最快7 .下表列出了相同条件下不同物质的密度,声音在不同物质中传播的速度。
根据表中提供的信息,可以得出的结论是CA.声音传播的速度随着物质密度的增大而增大B.声音传播的速度随着物质密度的增大而减小C.声音在金属中传播的速度大于它在气体中传播的速度D.声音在金属传播的速度小于它在气体中传播的速度8 .关于声音的说法正确的是 BA.物体只要振动,人们就能听到声音B.声音只能通过介质传播C.声音在一切介质中的传播速度都是相同的D.声音中,人们听不见的声音只有超声波9.以下说法中,与实际生活相符的是DA.一支铅笔的长度约为15dmB.家庭电路的电压为36VC.冰箱冷冻室的温度约为20℃D.声音在15℃的空气中的传播速度为340m/s10 .关于声现象,下列说法正确的是AA.声音是由物体的振动产生的B.超声波不是由物体振动产生的C.宇航员在月球也可以直接交谈D.声音在固体、液体中比在空气中传播得慢些11.人们说话时声带在_____________。
人教版初中物理八年级物理上册第二章《声音的产生与传播》测试卷一、选择题1.(2分)小孩用嘴巴把一个气球吹大,由于小孩用力太大,气球被吹破了,发出“嘭”的一个大响声,这响声是由于:()A.球皮被吹大时振动发出的响声;B.吹气时球内空气振动发出的响声;C.破裂时球皮振动发出的响声;D.球破裂时引起周围空气振动发出的响声 .2.(2分)声音的产生与传播中,下列说法错误的是:()A.声音是由物体的振动产生的B.声音传播需要介质C.频率小于20000H Z的声音人们都能听到D.噪声是发声体做无规则振动时发出的声音3.(2分)用手指堵住双耳,则下列说法正确的是()A.只能听到自己的讲话声B.只能听到别人的讲话声C.自己和别人的讲话声都能听到D.自己和别人的讲话声都听不到.4.(2分)自行车的车铃响时,用手握住车铃就听不到铃声了,这是因为()A.车铃发出的声音被手全部吸收了。
B.车铃发出的声音被手挡住无法听到。
C.车铃被握住后停止振动不在发出声音D.以上说法都不对。
二、多选题5.(0分)小玲在书房记单词,爸妈在客厅看新闻联播,为了减小电视机声音的影响,小玲采用的以下办法中较为合适的是()A.把电视机关掉B.减小电视机的音量C.关上书房的门D.打开书房和客厅的门窗,加快空气的流动6.(0分)已知声音在空气中传播的速度为v1,在钢轨中的传播速度为v2,有人用锤子敲了一下钢轨的一端,另一人在另一端听到两次声音的时间间隔为t,下列说法正确的是(v2>v1):()A.钢轨的长为B.钢轨的长为(v2- v1)tC.声音沿钢轨从一端传到另一端所用时间为D.声音沿钢轨从一端传到另一端所用时间为t评卷人得分三、填空题7.(3分)有些耳聋病人配有骨导式助听器就能听到声音的原理是______________________。
8.(3分)如图2-1,敲击鼓面会听到鼓声,若向鼓面上撒些纸屑或泡沫塑料的颗粒,还会看到们在鼓面上跳动如图2―2,敲击音叉会听到声音,若将发声的音叉靠近一只悬挂的小球,小球会摆动。
人教版八年级物理上册第二单元第一节声音的产生与传播典题目练习含答案人教版八年级物理上册第二单元第一节声音的产生与传播典题目练习含答案一、单选题1.有一段长为18m的装满水的铁管,将耳朵贴在装满水的铁管一端,在另一端敲一下,能听到几次声音?(已知:声音在铁、水和空气中的传播速度依次为5200m/s、1500m/s和340m/s.人耳能分清前后两次声音的时间间隔要大于0.1s)()A.1次B.2次C.3次D.4次2.如图所示,小恒同学在探究“声音是由物体振动产生的”实验中,将正在发声的音叉紧靠悬线下的轻质小球,发现小球被多次弹开。
以下叙述错误的是()A.你听到了音叉发出的声音,说明空气可以传播声音B.这样做是为了把音叉的微小振动放大,便于观察C.该现象说明了音叉在振动D.使声波被多次反射形成回声3.关于声音产生和传播的说法正确的是()A.声音不能在固体中传播B.只要物体振动,我们就能听见声音C.物体的振动一旦停止,发声也随之停止D.声音可以在月球上空传播4.在演示声音是由物体的振动发生的实验中,将正在发声的音叉紧靠悬线下的泡沫塑料球,球被多次弹开。
在此实验中,泡沫塑料球的作用是()A.使音叉的振动尽快停下来B.使音叉的振动时间延长C.将音叉的微小振动放大,便于观察D.使声波多次反射,形成回声5.如图所示,扬声器播放音乐时,放在纸盒上的小纸片会不断地跳动.这个实验是用来研究A.声音产生的原因B.音调与频率的关系C.声音传播的条件D.乐音与噪声的区别6.关于声现象,下列说法正确的是()A.声音在不同介质中的传播速度相同B.人说话是靠舌头振动发声的C.只要物体在振动,我们人耳就能听到声音D.一切发声物体都在振动二、填空题7.如图为音叉共鸣实验:两个频率相同的音叉,用橡皮槌敲击第一个音叉,第二个未被敲击的音叉也会发出声音。
第一个音叉发出声音是音叉______产生的;第二个音叉会发出声音,说明_______能传播声音。
人教版初中物理八年级物理上册第二章《声音的产生与传播》测试卷学校:题号一二三四总分得分评卷人得分一、选择题1.(2分)在雷雨来临之前,电光一闪即逝,但雷声却隆隆不断,这是由于:()A.雷一个接一个打个不停;B.双耳效应;C.雷声经过地面、山岳和云层多次反射;D.电光的速度比雷声传播速度大.2.(2分)邮局的长途电话亭大都是用玻璃制造的,隔音效果好,这主要是因为玻璃:()A.能较好地反射声音; B.能较好地吸收声音;C.不能传播声音; D.能够发出声音.3.(2分)如图所示,兰兰做有关声现象的实验时,将一个正在发声的音叉贴近面颊,目的是为了 ................................................................................................................................ ()A.感受发声音叉的振动B.体验发声音叉的温度C.估算发声音叉的质量D.判断声音的传播速度4.(2分)下列关于声现象的说法中,正确的是 ........................................................... (B)A.声音可以在真空中传播B.声音可以在空气中传播C.声音速度比光速快D.声音在各种介质中的速度一样快5.(2分)下列关于声现象的说法中,不正确的是()A.悦耳动听的歌声是由歌唱家的声带振动发出的B.声音传播需要介质,真空不能传声C.声音在固体中的传播速度大于在空气中的传播速度D.声音在各种介质中的传播速度是一样的.6.(2分)发生灾难时,被困在建筑物废墟中的人向外界求救的一种好方法是敲击铁制的管道,这种做法是利用铁管能()A.传声B.传热C.导电D.通风.7.(2分)大会礼堂和大剧场的四周墙壁做成凹凸不平的蜂窝状,这是为了()A.装饰B.减少声音的反射C.增大声音的响度D.增强声音的反射8.(2分)生活中的光现象丰富多彩。
人教版八年级上册物理第二章第1节:声音的产生与传播针对练习(含答案)1.如图所示的四幅图中,不能产生声音的是C2.2018年3月28 13,山西王家岭煤矿发生透水事故,政府立即展开大救援,有一遇险工人用铁锤敲打钢管传出声音的办法获救。
关于声音,下列说法正确的是D A.只要物体振动,就一定能听到声音B.我们听不到声音一定是因为物体不振动C.“震耳欲聋”说明声音的音调高D.物体发声一定是因为物体在振动3.如图所示,扬声器播放音乐时,放在纸盒上的小纸片会不断地跳动。
这个实验是用来研究AA、声音产生的原因B、声音传播的条件C、音调是否与频率有关D、乐音与噪声的区别4.小纸片会在发声的扬声器的纸盒上跳动,发声的音叉接触水面时会激起水花,风吹树叶哗哗响,树叶在振动。
这些现象说明了:AA.声音是由物体振动产生的B.声音能在水中传播C.声音的传播需要介质D.声音能在空气中传播5.关于声音,下列说法正确的是CA.声音在气体中传播最快B.声音能够在真空中传播C.声音是由物体振动产生的D.发声体振动越快,音调越低6.清晨,小鸟清脆的叫声让我们心情舒畅.关于小鸟的叫声,下列说法正确的是 A A.小鸟的叫声是由它的发声器官振动产生的B.小鸟的叫声只能在空气中传播C.口技演员主要模仿的是小鸟叫声的响度D.推开窗户后听到小鸟的叫声变大,是因为音调变高了7.下列说法中正确的是BA.只要物体振动,就一定能听到声音B.固体、液体、气体都能传播声音C.宇航员们在月球上也可以直接用口语交谈D.声音在固体、液体中比在空气中传播得慢些8.为了探究声音的响度与振幅的关系,小明设计了如图2所示的几个实验。
你认为能够完成这个探究目的的是D9.如图所示,用悬挂着的乒乓球接触正在发声的音叉,乒乓球会多次被弹开.这个实验是用来探究BA.声音能否在真空中传播B.声音产生的原因C.音调是否与频率有关D.声音传播是否需要时间10.魔术师表演“会跳舞的火焰”节目时,先在平台上点燃一支蜡烛,然后手持一面小鼓置于蜡烛附近,鼓面面对烛火。
人教版2022年八年级物理训练题-声音的产生与传播(1)一.选择题1.一种神秘的声波武器--“金嗓子”,实际要阻挡这一武器的袭击,只要用薄薄的一层()A.半导体 B.磁性物质 C.真空带 D.金属物质2.如右图所示,用悬挂着的乒乓球接触正在发声的音叉,乒乓球被弹开。
这个实验是我们在学习《声现象》一章时经常做的实验,它说明了()A.发声的音叉正在振动 B.声音可以在真空中传播C.声音的传播不需要介质 D.声音在空气中的传播速度最快3. 关于声音的产生和传播,下列说法正确的是()A.正在发声的物体一定在振动B.声音不能在固体中传播C.声音可以在空气中传播,但不能在水中传播D.声音在真空中传播的速度是340m/s4.在演示声音是由物体的振动发生的实验中,将正在发声的音叉紧靠悬线下的泡沫塑料球,球被多次弹开.在此实验中,泡沫塑料球的作用是()A.使音叉的振动尽快停下来B.使音叉的振动时间延长C.将音叉的微小振动放大,便于观察D.使声波多次反射,形成回声5.如图五所示为音叉共鸣实验:两个频率相同的音叉,用橡皮槌敲击其中一个音叉,另一个未被敲击的音叉也会发出声音。
此现象可以说明()A.空气可以传播声音B.声音传播不需要介质C.声音传播不需要时间D.物体不振动也可产生声6.下列现象中说明声音产生原因的是()A.敲击音叉发声,与音叉接触着的乒乓球被弹开B.敲击一下长铁管的一端,在另一端的人先后听到两次打击声C.敲击打击乐器,发出不同的声音D.敲击水中的石块,岸上的人也能听到敲击声7.某同学在学习了“声音是什么”以后,总结出以下四点,其中错误的是()A.声音是由物体振动产生的B.声音是一种波C.通常情况下,声音在空气中传播得最快D.声音具有能量8. 一艘快艇在平静的湖中启动并向湖边驶去.此过程中,水中的鱼可听到马达声,岸边飞行的鸟、散步的人也可听到.若距快艇的距离三者都相等,最先察觉快艇起动的是()A.鱼 B.人 C.鸟 D.三者同时察觉9.喜庆的锣鼓敲起来,不少同学发现,在敲响锣以后,虽然停止了对锣面的敲击,但锣声仍“余音未绝”,分析其原因是()A.锣面仍在继续振动B.锣面停止振动,但空气仍在振动C.锣声的回音D.人的听觉发生“暂留”10.关于声音的传播,下列说法中正确的是()A.声音从空气传入水中后,传播速度不变B.声音能在空气中传播,也能在液体中传播C.声音在水中的传播速度一定大于在固体中的传播速度D.声音在真空中的传播速度为340m/s11.关于人听觉的形成,下列说法正确的是()A.只要是人耳的听小骨断裂,人就会永远听不到声音B.只要是人耳的鼓膜破裂,人就会永远听不到声音C.若只是传导障碍,只要能将声音的振动传递给听觉神经,人也能听到声音D.以上说法都不正确12.助听器的工作原理是利用仪器()A.引起头骨、颌骨振动,传到听觉神经,引起听觉B.产生声波直接作用在听觉神经引起听觉C.产生超声波直接作用在听觉神经引起听觉D.引起鼓膜振动,经过听小骨及其他组织传给听觉神经,引起听觉二.填空题13.上课时老师讲话的声音是由于______ 振动产生的,并通过______传到同学们的耳朵里。
初中物理人教版八年级上学期 2.1 声音的产生与传播一、基础题(共8题)1.关于声音的发生和传播,下列说法中正确的是()A. 一切发声的物体都在振动B. 声音可以在真空中传播C. 只要物体振动,就能听到它发出的声音D. 在空气中声音的速度与的速度光相同2.如图所示,用悬挂着的乒乓球接触正在发声的音叉,乒乓球被弹开,这个实验说明了()A. 发声的音叉正在振动B. 声音可以在空气中传播C. 声音的传播不需要介质D. 声音在空气中传播速度最快3.在影视剧中,经常能看到这样的情境:古代的侦察兵为了及早发现敌人骑兵的活动,常常把耳朵贴在地面上听。
对此情境以下解释错误的是()A. 马蹄踏在地面时,使土地振动而发声B. 马蹄声可以沿土地传播C. 马蹄声不能由空气传播D. 土地传播声音的速度比空气快4.声音是由于物体________而产生的,真空铃实验说明声音的传播需要________。
5.人们交谈时能听到对方的讲话声,表明________能够传声。
鱼能被它们喜欢的声音吸引,表明________也能传声。
6.放在钟罩内的闹钟正在响铃,把钟罩内的空气逐渐抽去,听到的铃声逐渐减弱,这说明声音的传递需要________;宇航员们在飞船内可以直接对话,但在飞船外工作时,必须借助电子通讯设备才能进行对话,其原因是太空是真空________传声。
7. 2019年2月5日零时,中央电视台的新年钟声准时响起,让全国人民感受到新年的喜悦。
这优美的钟声是由钟________产生的,电视机直播的钟声是通过________传播到观众的耳朵里。
8.如图所示,用悬挂着的乒乓球接触正在发声的音叉,乒乓球会多次被弹开,这个实验说明一切发声的物体都在________,这种研究物理的方法叫________。
(选填“控制变量法”或“转换法”)二、提升题(共8题)9.以下几个实验现象中,能说明声音的传播需要介质的是()A. 音叉被敲击后,以及伸入水中,会溅起水花B. 打鼓时,放在鼓面上的沙粒不停地跳动C. 拨动吉他的琴弦发出声音时,放在弦上的小纸片会被琴弦弹开D. 放在玻璃钟罩内的电铃正在发生,把玻璃钟罩内的空气抽去,铃声明显减弱10.如图所示,中国海军的护航舰艇上,出现了一种神秘的声波武器——“金噪子”,对海盗构成了有效威慑。
2.1 声音的产生与传播班级:姓名:成绩:一、单选题1、学习科学知识的价值之一,是主动将所学知识创造性地服务于社会。
如“声音的传播需要介质”就有许多实际应用。
下列发明成果应用了这一知识的是()A.发电机B.望远镜C.真空玻璃D.体温计2、小明在探究“声音是由物体振动产生的”实验中,用正在发声的音叉紧靠悬线下的轻质小球,发现小球被多次弹开,如图所示。
下列说法正确的是()A.音叉发声是由于小球的振动产生的B.小球的振动频率与音叉的振动频率相同C.小明听到音叉发出的声音是通过空气传播的D.实验中把音叉的微小振动转换成小球的跳动,是为了增大声音的响度3、如图所示,把正在响铃的闹钟放在玻璃罩内,逐渐抽出玻璃罩内的空气,听到闹铃声逐渐变小,直至听不见;再让空气逐渐进入玻璃罩内,听到闹铃声又逐渐变大。
关于上述实验,下列说法正确的是()A.空气可以传播声音B.只要闹钟振动,就可以听到闹铃声C.听不见闹铃声了,是由于闹钟不再振动D.听到闹钟声又逐渐变大,是由于闹钟振动逐渐变剧烈了4、声音在传播过程中,下列说法正确的是()A.音色会逐渐改变 B.音调会逐渐降低C.响度会逐渐减小 D.声音的音色、音调和响度都不会改变5、如图所示,在演示声音是由物体振动引起的实验中,将正在发声的音叉紧靠悬线下的轻质小球,小球被多次弹开.在此实验中小球的作用是()A.使音叉振动时间延长B.使音叉振动尽快停下来C.把音叉的微小振动放大,便于观察D.使声波多次反射形成回声6、小纸片会在发声的扬声器的纸盒上跳动,发声的音叉接触水面时会激起水花,风吹树叶哗哗响,树叶在振动.这些现象说明了()A.声音是由物体振动产生的B.声音能在水中传播C.声音的传播需要介质D.声音能在空气中传播7、下列各图描述的实验中,用来说明声音的传播需要介质的是()A.发声的音叉激起水花B.音叉发出的声音越响,乒乓球被弹开的越远C.钢尺伸出桌边的长度变短,振动时声音的音调变高D.不断将钟罩内空气抽出时,听到的声音在不断减小8、虽然看不到火车,但把耳朵贴在铁轨上,就能够听到远处火车开来的声音,这是因为()A.声音在铁轨中的传播速度比在空气中的传播速度快B.声音在铁轨中的传播速度比在空气中的传播速度慢C.声音在铁轨中的传播速度比光在空气中的传播速度快D.声音在铁轨中频率变大传得远9、下列声现象中,能说明声音的传播需要介质的是()A.蝙蝠靠超声波发现昆虫B.倒车雷达C.超声波清洗机D.真空罩中的闹钟10、人在池塘边的脚步声会吓跑附近水域的鱼,声音传播的主要途径是()A.岸——空气——水——鱼B.空气——水——鱼C.岸——空气——鱼D.岸——水——鱼11、能说明“液体可以传播声音”的事例是()A.我们听到雨滴打在雨伞上的“嗒嗒”声B.我们听到树枝上小鸟的“唧唧”声C.将要上钩的鱼被岸边的说话声吓跑D.人在小溪边听到“哗哗”的流水声12、下列各图描述的实验中,用来说明声音的传播需要介质的是()13、下列的实验和实例,能说明声音的产生或传播条件的一组是()①在鼓面上放些碎纸屑,敲鼓时可观察到纸屑在不停地跳动;②放在真空罩里的手机当来电时,只见指示灯闪烁,听不见铃声;③拿一张硬纸片,让它在木梳齿上划过,一次快些,一次慢些,比较两次的不同;④锣发声时用手按住锣,锣声就消失了.A.①②③B.②③④C.①③④D.①②④14、如图所示,将正在发出声音的音叉放入水中,能观察到音叉周围溅起许多水花。
Unit 9T ask 1【答案】1) b, 2) a, 3) c, 4) c, 5) b, 6) a, 7) c, 8) b, 9) a, 10) b【原文】1) So, what does your father do for a living?2) How many people are in your family?3) How old is your sister?4) Where do your parents live now?5) How many brothers and sisters do you have?6) What is your brother’s name?7) Where does your mother work?8) How long have you been married?9) Do you have any children?10) Where did you and your wife meet?T ask 2【答案】【原文】My name is Mary and I’m 13. I’m the eldest in my family. It’s terrible. I have to help m y mother in the house, and do the shopping too. But my younger brother and sister don’t do a thing. They just play all day. And they come into my room and break my things. My mother says, “Y ou must be nice to them. They’re smaller than you.” And my father tells me, “Y ou’re the eldest, so you must set a good example.”I’m John, 12. I’m the youngest in my family. I hate it. My two brothers are 18 and 16, and my siste r’s a year older than me. But they all think I’m still a baby. They can go to bed late, but I have to go to bed early. They get more pocket money than me too, and they have bigger bedrooms. I’ve got the smallest room in the family. And no one ever listens to me.My name is Anne and I’m 12. I’m the middle one in my family. That’s the worst place of all. I’m not the eldest and I’m not the youngest, so I’m not special. My elder sister does everything first, and she gets everything new. I have to wear her old clothes and use her old bag for school. Then everyone spoils my baby brother. They bring him presents and talk about him all the time. When I grow up, I’m going to have two children only. That’s better.T ask 3【答案】1) c, 2) a, 3) a, 4) a, 5) b, 6) a, 7) c【原文】Ana Maria Cavazos was born on June 9th, 1908, in Reynosa, Medico. She was the eleventh of twelve children.Her father, Jesus Cavazos, was originally from V ictoria, Texas, but moved his family to Mexico around 1855.Ana’s mother, Juana Castro, was the oldest of six brothers and sisters. Juana and Jesus were married in 1880. Ana’s family came to the United States during the Mexican Rev olution in 1913. Their family experienced much hardship. Ana grew up in Texas and met her future husband in 1929. Ana and Abel Contreras were married in 1931 and were the parents of eleven children.T ask 4【答案】1) F, 2) T, 3) T, 4) F, 5) F, 6) F【原文】Margaret: Is family life in England very different from family life in your country, Maria? Maria: No, I don’t think so. But I have noticed a few differences.Margaret: Oh, such as what?Maria: Well, the family unit seems to be smaller here than in my country. For you, the family is simply Mum, Dad and the children.Margaret: Y ou have a more extended family circle, do you?Maria: Y es. It’s quite common in my country to have a grandmothe r and an unmarried aunt or uncle living in as part of the family. And we wouldn’t dream of sending anelderly relative to an old people’s home, for instance.Margaret: Y ou take care of elderly relatives yourselves, I guess.Maria: Oh yes. We haven’t got all your welfare services and it’s the family’s duty to loo k after an elderly parent, for example.Margaret: What about hospitality? Do you think English families do a lot of entertaining? Maria: Y es, but in a rather f ormal way. Y ou don’t like people to “drop in” without a previous invitation, do you? In my country it’s quite usual to drop in on friends andrelatives.Margaret: Have you ever lived in with an English family?Maria: Y es, I have. I was an au pair girl for a year. I learned a lot about English family life then. I’d never realized how fond the Englishman is of his home and family, his gardenand his pets.Margaret: Pets? What sort of pets did they have?Maria: Oh, all sorts— dogs, cats and goldfish.Margaret: Did you enjoy living in with the family?Maria: Oh, yes. They were very kind. Everybody helped with the washing up, including the children, and we always found time to sip tea and watch television in the evenings!T ask 5【答案】1) b, 2) c, 3) b, 4) b, 5) a【原文】Susan: I suppose that in England, too, family life has changed a lot in the last 50 years, hasn’t it?Marilyn: Oh yes, very much so. I think families used to be much larger. My grandmother was one of fourteen children! V ery few people nowadays care to have such large families. Susan: I suppose that’s why in those days very few women took up careers outside the home. They were too busy bringing up their families.Marilyn: Y es, but most well-to-do families had servants to do the housework and even nannies to look after the children.Susan: Would you like to have lived then, Marilyn?Marilyn: Not particularly! Women weren’t as free as they are today. They often had to marry men they didn’t like and they were financially dependent on their parents ortheir husbands. I think we’re much better off today, don’t you?Susan: Well, I suppose we have more freedom of choice and we’re more independent, but, you know, some arranged marriages were very successful. And there wassomething rather charming about courtship in those days.Marilyn: Really? Such as what?Susan: Well, the custom of asking a girl’s father for permission to marry her, for example. Marilyn: An d supposing he didn’t give his permission? No, thank you. I think family life is much pleasanter today because it’s freer and more informal. At least today we’re free tomarry whoever we like and to take up a job, if we wish.Susan: That’s true. But I still think that family life in the old days must have been very pleasant and secure.T ask 6【答案】1) They never interfered with her plans too much and she was allowed to take up the career she wanted.2) She became independent financially. But she still stays with her parents a lot.3) Y es.4) She doesn’t always get along well with her parents.5) They treat her as a child and they try to control her.【原文】Bella: Do you think young people are given too much freedom nowadays and that as a result they’ve lost respect for their parents and their elders generally, Joyce?Joyce: I don’t think s o. My parents never interfered with my plans too much. They advised me but never forced me to do anything I didn’t want to do. I was allowed to take up the career I wanted. I think I respect and love them more for this.Bella: Are you quite independent of them now?Joyce: Y es. As soon as I left school and started my studies as a nurse, I became independent financially. I have a government grant which is enough for my keep. But I still stay with them a lot, as you know.Bella: Y ou seem very close to your parents.Joyce: I am. I know that many young people today say they have nothing in common with their parents, but I’m rather lucky because I get on well with mine. What about you,Bella?Bella: Well, we value fam ily life very much in my country. I’m very fond of my family, but I don’t always get on very well with them. They try to control me too much.Joyce: But they allowed you to come to study in England on your own!Bella: Y es, but only after a lot of persuasion! Y our parents treat you as an adult; mine treat me a child.Joyce: As I said, I’m lucky. Some English parents are like yours. They interfere too much and they’re out of sympathy with our generation.T ask 7【答案】A. dB.1) A writer for the “Agony Column” in Flash magazine.2) Fifteen in two months’ time.3) Manchester.4) Quite a rough city.5) Christine.【原文】Radio Presenter: Good afternoon. And welcome to our midweek phone-in. In today’s programme we’re going to concentrate on personal problems. And here with me in the studioI’ve got Tessa Colbeck, who writes the agony column in Flash magazine. Andwe have our first caller on the line, and it’s Rosemary, I think, er... calling fromManchester. Hello Rosemary.Rosemary: Hello.Radio Presenter: How can we help you, Rosemary?Rosemary: Well, it’s my dad. He won’t let me stay out after ten o’clock at night and all my friends can stay out much longer than that. I always have to go home first. It’sreally embarrassing.Tessa: Hello, Rosemary, love. Rosemary, how old are you, dear?Rosemary: I’m fifteen in two months’ time.Tessa: And where do you go at night — when you go out?Rosemary: Just to my friend’s house, usually. But everyone else can stay there much later than me. I have to leave at about quarter to ten.Tessa: And does this friend of yours.., does she live near you?Rosemary: It takes about ten minutes to walk from her house to ours.Tessa: I see. Y ou live in Brighton, was it? Well, Brighton’s ....Rosemary: No. Manchester... I live in Manchester.Tessa: Oh. I’m sorry, love. I’m getting mixed up. Y es, well Manchester’s quite a rough city, isn’t it? I mean your dad...Rosemary: No. Not really. Not where we live. It isn’t. I don’t live in the City Centre or anything like that. And Christine’s ho use is in a very quiet part.Tessa: Christine. That’s your friend, is it?Rosemary: Yeah. That’s right. I mean, I know my dad gets worried but it’s perfectly safe. Radio Presenter: Rosemary, have you talked about this with your dad?Rosemary: No. He just s houts and then he says he won’t let me go out at all if I can’t come home on time.Radio Presenter: Why don’t you just try to sit down quietly with your dad—sometime when he’s relaxed—and just have a quiet chat about it? He’ll probably explain why hew orries about you. It isn’t always safe for young girls to go out at night.Tessa: Y es. And maybe you can persuade him to come and pick you up from Christine’s house once or twice.Rosemary: Yes. But I don’t think he’ll agree to that. Anyway,I’ll talk to him about it. Thanks.T ask 8【答案】1) F, 2) T, 3) F, 4) F, 5)F【原文】George’s mother was worried about him. One evening, when her husband came home, she spoke to him about it.“Look dear,” she said, “you must talk to George. He left school t hree months ago. He still hasn’t got a job, and he isn’t trying to find one. All he does is smoke, eat and play records.”George’s father sighed. It had been a very tiring day at the office.“All right,” he said, “I’ll talk to him.”“George,” said George’s mother, knocking at George’s door, “your father wants to speak to you.”“Oh!”“Come into the sitting-room dear.”“Hello old man,” said George’s father, when George and his mother joined him in the sitting-room.“Y our father’s very w orried abou t you,” said George’s mother. “It’s time you found a job.”“Y es,” replied George without enthusiasm.George’s mother looked at her husband.“Any ideas?” he asked hopefully.“Not really,” said George.“What about a job in a bank?” suggested George’s mother,“or an insurance company perhaps?”“I don’t want an office job,” said George.George’s father nodded sympathetically.“Well, what do you want to do?” asked George’s mother.“I’d like to travel,” said George.“Do you want a job with a travel fi rm then?”“The trouble is,” said George, “I don’t really want a job at the moment. I’d just like to travel and see a bit of the world.”George’s mother raised her eyes to the ceiling. “I give up,” she said.T ask 9【答案】holding a job, even tougher, playing cops and robbers, shot, yelled, slumped to the ground, ran over, had been hurt in the fall, bent over, It’s the only chance I get to rest【原文】Being a working woman can be tough, but holding a job and having children is even tougher.There’s a story about a mother w ith three active boys who were playing cops and robbers in the backyard after dinner one summer evening.One of the boys “shot” his mother and yelled,“Bang, you’re dead.” She slumped to the ground and when she didn’t get up right away, a neighbour ran ove r to see if she had been hurt in the fall.When the neighbour bent over, the overworked mother opened one eye and said, “Shhh. Don’t give me away. It’s the only chance I get to rest.”T ask 10【答案】A.1) turn off the television2) feed the cat3) wash up dishes4) dry the dishes5) put away the dishes6) tidy the kitchen7) put out the cat8) lock all the doors9) turn out all the lightsB.1) She said she was going up to bed.2) She was sitting up in bed reading a book and eating chocolates.3) A gate banging downstairs.4) He had to go to shut the garden gate.【原文】“Henry!”“Y es, dear?”“I’m going up to bed now. Don’t forget to do your little jobs.”“No, dear.”Henry turned off the television and went into the kitchen. He fed the cat, washed up several dishes, dried them and put them away. Then he put the cat out, locked all the doors and turned out all the lights. When he got to the bedroom, his wife was sitting up in bed reading a book and eating chocolates.“Well dear, have you done all your little jobs?”“I think so, my love.”“Have you fed the cat?”“Y es, dear.”“Have you put him out?”“Y es, dear.”“have you washed up the dishes?”“Y es, dear.”“Have you put them away?”“Y es, dear.”“Have you tidies the kitchen?”“Y es, dear.”“Have you turned out all the lights?”“Y es, dear.”“Have you locked the front door?”“Y es, dear.”“Then you can come to bed.”“Thank you, dear.”After a little while they heard a gate banging downstairs.“Henry.”“Y es, dear.”“I’m afraid you’ve forgotten to shut the garden gate.”“Oh dear!”T ask 11【答案】1) b, 2) c, 3)a, 4)b, 5) b【原文】Interviewer: Mr. Dolby, do you mind if we speak a little about you and Katherine?David: Go ahead.Interviewer: She didn’t say very much about you to us, you see.David: Well, we weren’t together very long. Only about two years. Didn’t she tell you? Interviewer: No, not exactly. It must have been very difficult leaving your family.David: Y es and no. I miss the little boy. And I missed Katherine as well at first. Well, there was another baby on the way. That was difficult, of course, for her too. But it was herchoice. Not mine.Interviewer: Y ou mean she wanted you to go?David: Y es.Interviewer: What was wrong?David: We argued a lot. I had a job and when I got home in the evenings nothing was done.Nothing. I had to cook all the meals. Do the cleaning. It was an impossible situation.T ask 12【答案】Main idea: are becoming more and more diverse1) Horizon Research Group, families in China’s cities are becoming more and more diverse, several generations under the same roof, a double-income-no-kids (DINK) family2)a) 48 percent, 1997, 37 percentb) one-person, linear, generational, 7.2 percent, 1 percentage point, six years agoc) 6.8 percent, 3.9 percentage pointsd) a married couple living with their parents, three generations, 6.4 percentage points, 49 percente) cohabitation, celibacy3) pluralistic society, diverse values, 1980s, 10,000, 60,000a 38-year-old businessman, a graphic designer, their two-person family is one of the happiest inthe world, have so many plans to do things together, we are two kids who like playing together, satisfied with, bother with children【原文】After a hard day’s work, people used to go home to the nuclear family— husband, wife and children.But families are changing shape in China. These days, a household may consist of one person, several generations under the same roof, or a double-income-no-kids (DINK) family.A national survey by Horizon Research Group released over the weekend shows that families in China’s cities are becoming more and more diverse.The most common family type in Chinese cities was once the nuclear family. But while it accounted for 48 percent of families in urban areas in 1997, that figure has decreased to 37 percent today, the survey shows.Covering more than 1,000 households in Beijing, Shanghai, Guangzhou and Wuhan, the survey found that the number of DINKs, one-person and linear or generational families is on the rise from six years ago.The research group carried out a similar survey of family types in 1997, covering more than 5,100 households in 10 major cities across China.This time round, more than 7.2 percent of respondents classified themselves as DINKs, 1 percentage point higher than six years ago.One-person households account for 6.8 percent of respondents, 3.9 percentage points higher than the previous survey.Linear families—a married couple living with their parents or three generations living together — increased in number by 6.4 percentage points, reaching 49 percent.According to social science experts, it seems certain more distinct lifestyles will emerge, for example, cohabitation and celibacy are both on the rise.In any event, today’s pluralistic society, with its diverse values, should be welcomed, said Li Yinhe, a sociologi st on family and marriage. “Everyone’s choice, whether traditional or unconventional, should be respected,” Li said.Since the DI NK lifestyle emerged in the 1980s, it has sprung up in all of China’s big cities. Beijing now has 10,000 DINK families. When combined with those in Shanghai and Guangzhou, the figures rise to about 60,000, according to Y outh League Committee of Beijing statistics.Childbearing was in ancient China a family’s top priority, but now it is regarded as a personal choice by many young couples.Zheng Jian, a 38-year-old businessman, and his wife Xiao Y an, a graphic designer, think their two-person family is one of the happiest in the world.They have been married for more than 10 years and have no children.“We always have so many plans together, to do things together,” said Zheng. “And it seems like we are two kids who like playing together.”They insist: “We are satisfied with our present lives, so why bother with children?”T ask 13【答案】In the past, when more Americans lived on farms, the typical family had many children. In a farm family, parents and their children often lived with grandparents. Often, too, uncles and auntslived nearby. But when industry became more important than agriculture in American life, families became smaller. Industry requires workers who are ready and able to move off the land and to move again whenever necessary. Large families cannot be moved from place to place as smaller families can.Today, because of industrialization, a typical family will be required to move even more often, so families will be even smaller. The typical family may remain childless and consist only of a man and a woman. A smaller number of families may raise children. These families may raise children as their chief occupation, leaving the childless families free to move from job. Furthermore, these child-raising families may raise other people’s children in addition to their own.。
人教版八年级物理上册《2.1声音的产生与传播》同步练习题(附含答案)学校:___________班级:___________姓名:___________考号:___________一、单选题1.将正在发声的音叉插入水中,观察到音叉周围溅起许多水花,如图所示,这一现象充分说明()A.水花溅起能使音叉发声B.声音只能在水中传播C.发声的音叉正在振动D.真空不能传声2.下列关于声现象的说法正确的是()A.声音可以在真空中传播B.声音不能在液体中传播C.声音可以在空气中传播D.声音在各种介质中的速度一样快3.下表是声音在各种介质中传播的速度,根据表中的信息,可以得出的结论不正确的是()介质水(0o C)水(15o C)水(20o C)冰(0o C)软橡胶软木铁棒v/(m/s)1440147014803230455005200 A.水中声速大小跟水的温度有关B.水中声速大小跟水的状态有关C.固态介质中声速大小跟介质的种类有关D.声音在真空中不能传播4.将敲响的鼓面用手一按,声音会马上消失,这是因为()A.声音传播速度变慢了B.鼓面停止了振动C.声音传播速度变快了D.声音传到人体中去了5.关于声音的产生和传播,下列说法中错误的是()A.一切发声的物体都在振动,振动停止,发声也停止B.传播声音的介质有气体、液体、固体,真空不能传声C.声音在固体和液体中比在空气中传播得慢D.声音在介质中以波的形式传播6.石子投入水中发出声音,岸上的人和水中的鱼到石子的落点距离相等,如图所示,先听到声音的是()A.鱼B.人C.一样快D.无法确定7.人对着远处的高山大喊一声可以听到美妙的回声,一个人对着距离自己1360米远的高山大喊一声,他要听到自己的回声需A.1360秒钟B.680秒钟C.8秒钟D.2秒钟8.振动可以发声,某款智能手机的振动模式,是因为其内部有个微型电动机会带动转轴上的叶片振动,如图所示,能实现振动功能的叶片可能是()A.B.C.D.9.声音在空气中传播的速度是340 m/s,人对着相距425 m的高山喊一声,听到回声需经过的时间是()A.1.25 s B.2.5 s C.0.8 s D.5 s10.如图,超声波测速仪A,向远离自己而去的汽车B发出两次脉冲波的时间间隔为4.5s,第一个脉冲1.4s 后收到反射信号。