八年级上册M5u2上 达标检测
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人教版初中八年级上册每一节课的达标训练题第一章机械运动各节达标训练题第一节长度和时间的测量课节达标训练题一.选择题1.小超为了检验躺着和站立时身体长度是否有差异,下列几种尺子哪种最合适A.量程15cm,分度值0.5mmB.量程10m,分度值1dmC.量程30cm,分度值1mmD.量程3m,分度值1mm2.形成雾霾天气的主要污染物是PM2.5.PM2.5是指直径数值小于或等于2.5的悬浮颗粒物,其直径大约是一般分子直径(数量级为10-10m)的2万倍,能被肺吸收并进入血液,对人体危害很大.下列关于PM2.5的说法正确的是A.PM2.5在空中的运动属于分子的无规则运动B.PM2.5在空气中不受重力作用C.PM2.5中“2.5”的单位是nmD.PM2.5中“2.5”的单位是μm3.中学生的大姆指指甲面积约为A.1mm2 B.1cm2 C.1dm2 D.1m24.某同学用同一把刻度尺对同一物体的长度进行了4次测量,结果如下:12.34cm、12.36cm、12.35cm、12.75cm.则该物体的长度应记为A.12.45cm B.12.34cm C.12.35cm D.12.36cm5.下图中所列仪器用于测量时间的是A.卷尺 B.游标卡尺 C.螺旋测微器 D.挂钟二.填空题6.小刚学了长度测量以后,在分组探究活动中,估计教室里所用课桌的高度约为80____(填上合适的长度单位);然后又用刻度尺测量橡皮擦的长度,如图所示,图中橡皮擦的长度___cm。
7.如图所示,刻度尺的分度值为___mm,用它测得铅笔的长度为52.5__(填单位)。
8.如图所示,刻度尺的分度值是___,所测物体的长度是__cm 。
9.如图所示,读数时视线正确的是___(选填“A ”或“B ”),物体的长度为__cm 。
10.在“用刻度尺测量长度”的实验中,甲、乙两位同学用刻度尺测量同一木块的长度,如图甲、乙所示.(1)所用刻度尺的量程是____;(2)从刻度尺的放置而言,____同学的测量方法不正确.(3)测得木块的长度为____.甲 乙第一节 长度和时间的测量课节达标训练题参考答案一.选择题答案:1.D 2.D 3.B 4.C 5.D 二.填空题答案:6.cm 或厘米 3.10. 7.1 mm8.1mm 2.50. 9.B 2.46.10.(1)0~10cm (2)乙(3)3.80cm第二节 运动的描述课节达标训练题一.选择题1.当甲突然向前开动时,与之并排停放的在路边的乙车中驾驶员感觉自己在向后退,则他选择的参照物是A .甲车B .乙车C .路灯D .地面 答案:A2.古诗词《浪淘沙》中写到:“满眼风光多闪烁,看山恰似走来迎”,诗人描述“山是运动的”是选用哪个物体作为参照物A.船B.山C.河岸D.树木答案:A3.小红骑着自行车上学,若说她是静止的,则选择的参照物可能是A.小红背着的书包B.迎面走来的行人C.从身边驶过的汽车D.路旁的树木答案:A4.如图所示为动车组正在运行的情景。
人教版八年级物理上册第二章达标测试卷(含答案)1.关于声现象,哪个说法正确?A。
声音可以在固体中传播。
B。
声音传播的速度与温度无关。
C。
声音在真空中传播的速度最快。
D。
只要物体振动,我们就一定能听到声音。
2.在XXX《经典咏流传》的舞台上,十四个无声世界的孩子用手指放在对方的喉结附近相互感知发出“啊”的情景。
这种方式让听不到声音的孩子感知到发出“啊”,是利用了什么?A。
声音是由物体振动产生的。
B。
声音是通过空气传播的。
C。
固体传声比气体快。
D。
声音的音色可以用手感觉。
3.在纪念“五四”运动100周年暨庆祝新中国成立70周年的合唱比赛中,同学们用歌声表达了“青春心向志向。
合唱中“高音声部”和“低音声部”中的“高”和“低”,指的是声音的哪个特性?A。
音调B。
音色C。
响度D。
振幅4.机械手表放在耳朵附近,听到表针走动的声音较小;把一个气球放在手表与耳朵之间相互贴紧,听到表针走动的声音较大。
这两种情况声音的主要差别是什么?A。
音调B。
响度C。
音色D。
频率5.在医院、学校和科学研究部门附近,有禁鸣喇叭标志。
哪种方法与这种控制噪声的方法相同?A。
工人戴上防噪声耳罩。
B。
在道路旁设置隔声板。
C。
上课时关闭教室的门窗。
D。
在摩托车上安装消声器。
6.声能够传递“信息”和“能量”。
下面哪个事例主要利用声传递“能量”?A。
利用超声波给金属工件探伤。
B。
医生通过听诊器给病人诊病。
C。
通过声学仪器接收到的次声波等信息判断地震的方位和强度。
D。
利用超声波除去人体内的结石。
7.下列成语中,形容声音响度大的是哪个?A。
鸦雀无声B。
窃窃私语C。
宛转悠扬D。
声如洪钟8.远古时代,鼓被赋予神秘色彩。
湖北崇阳出土的商代铜鼓是迄今有三千多年历史的文物。
关于鼓声,哪个说法正确?A。
鼓声能在真空中传播。
B。
鼓面振动的幅度越大,响度越大。
C。
鼓声的音色与鼓的材料、结构无关。
D。
区分鼓声和其他乐器声是根据音调不同。
9.如图所示,监测器测得同一声源发出的甲、乙两声音的特性。
外研版新标准英语八年级上M5U2单元检测练习-名校版含答案通过各种形式的练习,帮助学生巩固本单元所学重点词汇以及句型、语法,体会其在具体语境中的含义及用法,抓好基础,回归教材。
一、根据句意及首字母提示,补全单词。
1. Jenny finished reading the n_____Little Women.2. This is a c_____tree. You can see it almost everywhere.3. I_____it snows tomorrow, we will go skiing (滑雪).4. Tina s_____me some photos of her family just now.5. When Uncle Jackie gave me the cat, I n_____her Mimi.二、根据句意,选择单词并用其恰当的形式填空。
magic, twenty, describe, act, society1. Today is Sally's_____birthday. She is very happy.2. The bad man is a danger to the_____. Don't you think so?3. The play is good, but I don't like the second and third_____.4. Nick_____to the police how the accident happened.5. The_____show was so good that everyone cheered.三、根据上下文意思,在空白处填入合适的单词。
Lao She's play, Teahouse, has three acts. It describes the life of Wang Lifa and the changes to the lives of__1__ people in Chinese__2__in the first half of the twentieth__3__. Lao She went to a teacher's school in Beijing, taught in London and later returned to China. He is one of China's greatest__4__. Come to Lao She Teahouse in Beijing__5__you like the Beijing Opera, traditional music or__6__shows.四、根据所给汉语完成翻译。
八年级上册英语第五单元达标检测卷八年级上册英语第五单元达标检测卷八年级上册英语第五单元达标检测卷(满分:120分时间:100分钟)一、听力理解(本大题分为A、B、C、D四部分,共30小题,每小题1分,共30分)(听力理解详见“听记手册”P6)二、单项填空(本大题有15小题,每小题1分,共15分)在每小题所给的四个选项中,选出可以填入空白处的最佳答案。
( C )31.—Have you heard of the news about Tom?—No, I haven’t.Tell me about________.A.them B.herC.it D.him( A )32.She often plans ________ something to help others. A.to do B.doesC.do D.did( D )33.—Are you going to the cinema tonight?—I don’t know.I ________ go or I________ stay at home. A.will;will B.must;mustC.should;should D.might;might( D )34.—How do you like edies?—________.I love them.A.It is relaxed B.They are relaxedC.It is relaxing D.They are relaxing( B )35.She expects ________ the film Monster Hunt 2 directed by Xu Chengyi.A.see B.to seeC.seeing D.to seeing( D )36.—What do you think of game shows?—________.They’re very boring.A.I don’t mind them B.I don’t know themC.I love them D.I can’t stand them( C )37.A bad traffic accident ________ yesterday.A.happened to B.took place inC.happened D.took place( A )38.My cousin is good at English.I ________ her to practice spoken English with me.A.wish B.hopeC.let D.decide( D )39.My mother wanted to ________ who broke the window. A.look for B.find forC.look out D.find out( A )40.He was ________boy.But________,he had a kind grandmother. A.an unlucky;luckily B.a lucky;luckilyC.an unlucky;unluckily D.a lucky;unluckily( B )41.—Where did you decide________ your summer holiday?—In Sanya.A.spend B.to spendC.spending D.spent( A )42.—Why do you e back so early, Amy? Why didn’t you watch the movie?—Because I ________ my ticket on the way.A.lost B.boughtC.chose D.gave( B )43.—What did the students do at the party?—They all ________ as different animals.A.dressed in B.dressed upC.put on D.put in( B )44.I think this movie is very ________.All of us enjoy it.A.boring B.educationalC.meaningless D.rich—________ Either is OK.A.I’m sure. B.I’m afraid not.C.I don’t know. D.I don’t mind.三、完形填空(本大题有10小题,每小题1分,共10分)通读下面短文,掌握其大意,然后在每小题所给的四个选项中,选出一个最佳答案。
第二章达标测试卷一、选择题(每题3分,共36分)1.“春眠不觉晓,处处闻啼鸟。
夜来风雨声,花落知多少。
”关于诗句中的声现象,下列分析正确的是()A.鸟声是由液体振动发出的B.鸟声是由固体振动发出的C.风声是由固体振动发出的D.雨声是由气体振动发出的2.在公共场所“轻声”说话是文明的表现,在课堂上“大声”回答问题才能让老师和同学们都能听清楚。
这里的“轻声”和“大声”是指声音的()A.音调B.响度C.音色D.声速3.琴弦H比琴弦L每秒振动次数多,推断此时H比L发出的声音的() A.音调高B.音调低C.响度大D.响度小4.“稻花香里说丰年,听取蛙声一片”,我们能区分蛙声是根据声音的() A.音调不同B.响度不同C.音色不同 D.频率不同5.位于山西省永济市普救寺中的莺莺塔如图所示,它是我国现有的四大回音建筑之一。
若游人在塔附近的一定位置以两石相击,便可听到“呱、呱”的回声,类似青蛙鸣叫,并且声音也变得格外响亮。
关于此现象,下列说法正确的是()A.“以两石相击”主要是空气振动发声B.“类似青蛙鸣叫”是指音色相近C.“变得格外响亮”是指音调变高D.“呱、呱”的回声一定是噪声(第5题)(第6题)6.如图所示,在四个完全相同的玻璃杯内装有质量不等的同种葡萄酒,用大小相同的力敲击四个玻璃杯,会发出不同的声音。
这“不同的声音”主要是指声音的()A.音调B.振幅C.音色D.响度7.下列实例是利用声传递能量的是()A.利用超声波给金属工件探伤B.利用超声波排除人体内的结石C.医生通过听诊器给病人诊病D.利用超声波导盲仪帮助盲人出行8.如图所示,小华在唱《青藏高原》这首歌,老爷爷所说的话是指唱到“高原”的“高”时,要求声音的()A.音调高B.音调低C.响度大D.响度小9.经超声波探伤仪检测,已建成的三峡大坝坝体无一结构性裂缝,创造了人类水利建筑史上的奇迹。
探伤仪发出的超声波无法为人耳所察觉,原因是超声波的()A.速度太快B.响度太小C.频率太高D.频率太低10.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。
八年级上册全册全套试卷达标训练题(Word版含答案)一、初二物理声现象实验易错压轴题(难)1.噪声是一种严重的环境污染,李明想制作一个防噪声的耳罩,他通过比较几种材料(衣服、锡箔纸、泡沫塑料)的隔音性能,来选择一种隔音性能好的材料做耳罩的填充物。
实验器材除了待检测的材料外,还有:音叉、机械闹钟、鞋盒。
(1)在本实验中适合作声源的是_____,另一个仪器不适合作声源的理由是___(2)李明将声源放入鞋盒内,在其四周塞满待测填充材料,他设想了以下A、B两种实验方案.你认为最佳的是________方案。
A.让人站在距鞋盒一定的距离处,比较所听见声音的响度B.让人一边听声音,一边向后退,直至听不见声音为止,比较此处距鞋盒的距离实验中测得的数据如下表所示,则待测材料中隔音性能最好的是____________。
(3)实验过程中应将声源响度________(选填“调大”或“调小”),因为铃声响度越大时,人要听不到声音时与声源的距离将越_____(选填大或小),导致实验在教室中难以进行.同时在比较不同材料时铃声响度应____(选填“随材料而改变”或“保持不变”),这种物理方法叫_______。
(4)小红从家中也找出下列一些材料开始探究:一张报纸、一件羽绒服、一个薄塑料袋、一些泡沫板,李明认为小红选择这些材料直接进行实验存在一个明显问题,不能有效地说明这些材料的隔声性能,请指出这个明显的问题:_______。
(5)对材料进行科学调整后,他们通过探究得到如下实验数据:由此数据可将这些材料隔声性能最好的是____________。
【答案】机械闹钟音叉发出的声音不稳定,不能持续发声B泡沫塑料调小大保持不变控制变量法没有控制材料厚度相同羽绒服【解析】【分析】【详解】(1)[1][2]机械闹钟,发出的声音稳定,能持续发声,所以选用机械闹钟,而音叉发出的声音不稳定,不能持续发声,所以不选用音叉。
(2)[3]A方案中,由于人耳听到的响度无法测量,只能凭感觉判断,没有可靠的实验数据;在B方案中,通过比较到鞋盒的距离判断隔音效果,因为距离可以测量,有可靠地实验数据,能够较好的判断隔音效果。
人教版八年级上册Unit2 达标测试卷笔试部分(100 分)五、单项选择(每小题 1 分,共 15 分)21. __________________________________ If you want to keep healthy, you should eat ________ meat.A. less B. moreC. much D. fewer22. _________________________________ Jane goesto visit her grandparents about _____________ a month.A. second B. twiceC. two D . one23.I______ r ide a bike to school. But this morning, I walked toschool.A. never B. hardlyC. seldom D. usually24. _____________________ Today isn't a warm day,the sun is shining.B. andA. orC. because D . although25. _______________________________ The man often spends his free time _____________________ with his littledaughter.A. playing B. to playC. plays D. play26.— You look tired today.What's wrong?— I _____ because I had too much homework to dolastnight.A. put up B. woke upC. stayed up D. picked up27. ________________ — Can you play p iano?— No, I can't. But I can play basketball.A. the; the B. the; aC. the; / D . a; the28. _______________ It is very good ___ us to be in good .A. for; health B. for; healthyC. in; health D. to; healthy29.— Can you understand what I said?— Sorry, I can __ f ollow you.A. always B. nearly C. hardly30. __________ “ Kat,e ?”“Junk fo?odOh, I hardly ever eat it.Youknow, it's unhealthy. ”A. what would you like to eatB. how soon will you eat junk foodC. how often do you eat junk foodD . what is junk food31. _______ .—do you go to the library?— Once a week.A. How often B. How longC. How far D. How soon32.A ______ w oman was saved from the ship on June 2nd, 2015.A. 65 year old B. 65-year-oldsC. 65-year-old D. 65-years-old33. ____________________________ D on't eat too much junk food. It is ____________________ y our health.A. bad of B. bad forC. good to D. good for34.______ he is ill.So he _at home now.A. May be; may be B. Maybe; may beC. Maybe; may D. May; may be35.The old man is a good swimmer, and even now he often swims _ T uojiang River after supper.A. over B. through C. to D. across六、完形填空(每小题 1 分,共 10 分 )Bill is pretty healthy. He (36) every day, usually when hecomes home _____ (37) school .His ___ (38) habits are pretty good. He tries ___ (39) a lot of vegetables. He eats fruit anddrinks milk every day. He __ (40) drinks coffee because hedoesn't like coffee. Of course, he (41)loves junk food,but hetries to eat ___ (42) only once a week. Oh, he sleeps nine ______ (43) every night. So you see, he looks after (44) health. And his healthy lifestyle helps him get good grades. Good food and exercise help him to study (_45) .36.A.exercise B. exercisesC. exercised D. exercising37.A.to B. from C. for D. back38.A.eating B. eat C. ate D. eats39.A.eat B. ate C. to eat D. eats40.A.always B. oftenC. usually D. never41.. A.also B.too C.either D. very42. A.them B. its C. it D.they43.A.hours B. minutes C. days D. hour44.A.my B. he C. him D. his45. A.good B.better C. best D.many七、阅读理解(每小题 2 分,共 30 分)AEveryone knows that exercise is important. We all need to exercise .Doctors say it is good for us. It makes our body strong. Children who often exercise are more alert.There are many ways to exercise. You can wa,lkrun,swim, skate or play ball games. You have to like what you're doing. Exerciseenough but not too much. It's the best to exercise twice a week. Thirtyminutes each time is enough. Try all kinds of things until you find one, two or even three sports thatare right for you.You can exercise at fitness__centers. They have a lot of equipment(设备)there.The equipment will help exercise your arms,legs and other parts of your body to make you fit.Exercising can be fun. Friends can exercise together at a fitness center, or they can play sports together.How do you exercise?46. ______________________________________ In thetext, the writer tells us that we all need to __ .A. drink B. sleepC. exercise D. work47.Which of the following sports is NOT mentioned in the text?A. Fishing. B. Running.C. Swimming. D. Walking.48. ________________________ E xercising makes the body .A. strong B. fatC. sick D . weak49. _____________________ It's the best to exercise .A. once a weekB. twice a weekC. three times a weekD. once a day50.The underlined words “ fitness centers ” in the text mean in Chinese.A .商务中心 D .医疗中心Tom is my classmate. We have very different eating habits. My diet is healthier than his. For breakfas ,t I have a glass of milk , some bread and an egg. Tom has a cup of coffe ,e some sausages 香肠 ( )and an egg. I take a lunch box( 午餐盒 )to school every day. In my lunch box , I have fish , rice and vegetables. I also have an apple or an orange.But Tom usually has a hamburger and French fries for lunch.If I am hungry between meals , I will have some fruit. But Tom eats sweets , chips , chocolate and cakes.When I'm thirsty , I like to drink water. But Tom likes to drink cola if he's thirsty.I don't eat much for dinner , but he eats a lot.B .健身中心C .购物中心51.. The writer and his classmate Tom __A. both have healthyB. both have unhealthyC. have differentD . want to change their52. _______________________ The writer and Tom both have _______________________A. an egg B. milkC. bread D. coffee53. _________ T om for lunch.A. takes a lunch box8.e ats junk foodC. has some fruitD . doesn't have French fries54. ____________ The writer between meals.A. never eats anything8.a lways eats more chipsC . often eats sweetsD . sometimes has some fruit55. ______________ T omprefers to _____________ .A . cola ;water B . water ; colaC . fruit ; cakesD . bread ; chocolateCWang Yan, a 15-year-old Chinese girl, likes eating snacks very much. She prefers cream biscuits, McDonald's hamburgers and KFC chicken. As a result, she has become overweight.Today in China, there are many children like Wang Yan. Health experts say that children should have healthy eating habits. First, they must eat regular meals and begin with a healthy breakfast. Second, they should have different kinds of foods, such as fruit, vegetables, grain, eggs, milk and meat. Third, children shouldn't eat too much junk food. It's delicious, but eating it often is bad for their health. If children eating habits. for their breakfast.do as the experts say, they won't become overweight.They will be healthier. Students won't become tired at school, and they will have enough energy to study hard.56.W hy has Wang Yan become overweight?A. Because she doesn't like sports.B. Because she likes eating vegetables.C. Because she likes eating snacks.D . Because she likes eating fruit.57.How many pieces of advice do health expertsgive in this passage?A. Two. B. Three. C. Four. D. Five.58.What kinds of food are good for our health according to the passage?A. Milk, fruit and KFC chicken.B. Cream biscuits, McDonald's hamburgers and KFCchicken.C. Packages of biscuits.D. Fruit, vegetables, grain, eggs, milk and meat.59.What will be the result if we do as the expertssay? We will be.A. overweight B. healthierC. tired at school D. confident60.What does the writer think of the junk food?A. Terrible. B. Healthy. C. Unhealthy.D. Sweet.八、选择单词或短语并用其适当形式填空(每小题 1 分,共 5 分)hardly, how often, to, more than, however61. _________________________ Many students have to learn __________________________ fifteen hours a day, so they are very tired.62. _________________________ Could you tell me the answer ____________________________ the question?63. _______________________ The girl is very quiet. She speaks loudly in class.64. __________ — do you water your little trees in summer?— Twice a day.65. _________________________ He has too much homework today. ____________________ ,_ he finishes it in an hour.九、根据汉语完成句子(每小题2 分,共 10 分)66.——你经常打扫你的房间吗?——不。
人教版八年级英语上册UNIT5达标测试卷时间:100分钟满分:120分第一卷听力部分(25分)一、听力测试(每小题1分,计25分)第一节。
听下面5个句子,从题中所给的A、B、C三个选项中选出与所听内容相符的图片。
1.2.3.4.5.第二节。
听下面5个句子,从题中所给的A、B、C三个选项中选择最佳答语。
6. A. Y es, I am. B. Y es, she is.C. No, he isn't.7. A. Bill is. B. Kate does. C. Eric did.8. A. I often watch them. B. They're interesting.C. I don't think so.9. A. I don't mind them.B. I plan to watch it tomorrow morning.C. Because I hope to find out what's going around the world.10. A. Sitcoms, of course. B. I like to watch TV.C. I can't stand talk shows.第三节。
听下面5段小对话,每段对话对应一个小题,从题后所给的A、B、C三个选项中选出能回答所提问题的最佳选项。
11. What does Sue like?A. Talk shows.B. Talent shows.C. Game shows.12. What does Jenny think of soap operas?A. She can't stand them.B. She doesn't like them.C. She doesn't mind them.13. What are they talking about?A. TV shows.B. Movies.C. Books.14. Who loves scary movies?A. The girl.B. Lucy.C. Jack.15. What does Mr. Zhang do?A. He's an actor.B. He's a doctor.C. He's a teacher.第四节。
八年级上册全册全套试卷达标检测(Word版含解析)一、初二物理声现象实验易错压轴题(难)1.在观看交响乐队演奏的过程中,小华发现同属于管乐器的圆号、小号、长号、大号发出声音的高低各不相同,他决定对此进行研究.经过和同学们讨论,提出了以下猜想:猜想一:管乐器发出声音的音调高低,可能与管内空气柱的长度有关猜想二:管乐器发出声音的音调高低,可能与管内空气柱的横截面积(粗细)有关小明找来了两个未使用过的一次性注射器制成了一些哨子(如下图所示).注射器的规格分别为2.5ml和5ml.他一边吹哨子一边调整注射器内空气柱的长度,同时利用专用仪器测出声音的频率和响度,详见下表(表中“ml”表示毫升,“cm”表示厘米)(1)选用序号为A、B、C的三次实验做对比,可以得出:在空气柱的______相同时,管内空气柱越短,音调越______.(2)选用序号为______的两次实验做对比,可以得出:在空气柱的______相同时,管内空气柱横截面积越大,音调越______.(3)序号为C、D的两次实验中,响度大的是______(选填“C”或“D”).【答案】横截面积(或粗细)高 A、D(或B、E或C、F)长度低 D【解析】【分析】【详解】要研究音调的高低和什么因素有关,需用控制变量法.(1)选用序号为A、B、C的三次实验做对比,可以得出:在空气柱的横截面积(或粗细)相同时,管内空气柱越短,单位时间内振动的次数越多,频率越快,音调越高.(2)琴弦发出声音的音调高低,可能与琴弦的横截面积有关,需控制琴弦的长短和琴弦的材料不变,所以要选择A、D(或B、E或C、F).由此可得,在空气柱的长度相同时,管内空气柱横截面积越大,音调越低;(3)序号为C、D的两次实验中,D实验时的声音强度为75分贝,大于C实验时的声音强度.2.小明同学在学习完课本上“探究声音的响度与哪些因素有关”的实验后,回到家中想用铁脸盆和水等材料来做这个实验,请帮助她完成探究报告.(1)提出问题:声音的响度与振幅有什么关系?(2)猜想与假设:______________.(3)进行实验与收集证据:A.需要实验器材:铁脸盆、水、钢勺.B.在铁脸盆中装入适量的水,用钢勺轻敲铁脸盆,会发现铁脸盆中的水在跳动.C.用较大的力敲铁脸盆,发现铁脸盆中的水跳动比步骤B中的水跳动________(选填“高”“低”或“不变”).(4)结论:通过分析,结合提出的问题,你能初步得出结论:___________________.(5)评估:你还可以用这些器材来探究什么问题____________?(写出探究的问题即可)【答案】振幅越大,响度越大高响度与振幅有关,振幅越大,响度越大声音是怎样产生的或音调高低与水多少有关吗?【解析】【分析】【详解】(2)本题所研究的问题是声音的响度与振幅有什么关系?因此,可以猜想:振幅越大,响度越大;(3)根据实验现象可知,用较大的力敲铁脸盆,发现铁脸盆中的水跳动比步骤B中的水跳动高;(4)通过实验分析,我们可以得出的结论是:响度与振幅有关,振幅越大,响度越大;(5) 因为实验中可以看到水的跳动,故还可以用这些器材来研究:声音怎样产生;另外在水盆中将入不同深度的水时,盆的振动频率会变化,所以还可以研究:音调高低与水的多少有关吗?3.吉他演奏会上,小组同学发现琴弦发出声音的音调高低是受各种因素影响的,经过讨论,他们提出以下猜想.猜想1:琴弦发出声音的音调高低,可能与琴弦的横截面积有关猜想2:琴弦发出声音的音调高低,可能与琴弦的长短有关猜想3:琴弦发出声音的音调高低,可能与琴弦的材料有关.为了验证上述猜想是否正确,同学们找到如下表所列的6种规格的琴弦,以及专门测量声音频率的仪器.(1)为了验证猜想1:应选用编号为_____、_____的琴弦进行实验.(2)为了验证猜想2:应选用编号为_____、_____的琴弦进行实验.(3)为了验证猜想3,请在表中填入所缺数据_________.【答案】A B C E 100 1.1【解析】【分析】【详解】控制变量法就是控制其它的因素不变,研究物理量与该因素的关系;(1)当研究琴弦发出声音的音调高低可能与琴弦的横截面积有关时,应控制材料和长度相同,所以应选A、B;(2)当研究琴弦发出声音的音调高低可能与琴弦的长短有关时,应控制材料和横截面积相同,所以应选C、E选项;(3)如果验证猜想三:琴弦发出声音的音调高低,可能与琴弦的材料有关,应控制长度和横截面积相同,故表格应该填入与尼龙和钢的数据相同,即100、1.1.因此,本题正确答案是:(1)A、B;(2)C、E;((3)100;1.1.【点睛】猜想琴弦发出声音的音调高低,可能与琴弦的横截面积、琴弦的长短、琴弦的材料有关,在探究过程中,应用控制变量法.4.如图所示,小明和小刚用细棉线连接了两个纸杯制成了一个“土电话”。