[初二上册物理试卷]初二物理试卷

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初二物理试卷篇(1):试题物理答案

  一、选择题
  1、关于教室内涉及到的一些物理量,下列描述最接近实际的是( )
  A.教室内的温度约为50℃ B.教室门的高度约为2m
  C.一张物理试卷的质量约为300g D.老师眨眼一次所用的时间为10s
  2、在医院、学校和科学研究部门附近,有如图所示禁鸣喇叭的标志。在下列方法中,与这种控制噪声的方法相同的是( )
  A.在摩托车上安装消声器 B.在道路旁设置隔声板
  C.工人戴上防噪声耳罩 D. 上课时关闭教室的门窗
  3、下面说法中错误的是( )
  A.发声体每秒振动次数越多,音调就越高,响度越大 B.声源离人耳越近,振幅越大,响度越大
  C.音色与发声体的结构,材料有关 D.用力敲鼓,鼓面振幅越大,响度越大
  4、某天上学时,以1.2 m/s的速度走完前一半的路程,为了不迟到,他改以1.8 m/s的速度走完后一半的路程,他上学时走路的平均速度是( )
  A.1.5 m/s B.1.44 m/s C.1.68 m/s D.1.36m/s
  5、一只刻度均匀的温度计,插在冰水混合物中,显示温度是2℃;插在1标准大气压下的沸水中,显示温度是96℃,那么当它插入水中显示温度为25℃时,水的实际温度是( )
  A.25℃ B.27℃ C.24.5℃ D.无法判断
  6、有关眼睛病变的解释中正确的是( )
  A、“近视”是由于眼球晶状体变扁,使焦距变长,近处景物成像于视网膜前造成的
  B、“远视”是由于眼球晶状体变凸,使焦距变短,近处景物成像于视网膜后造成的
  C、“近视”可以通过配带合适的凹透镜矫正,“远视”可通过配带合适的凸透镜矫正
  D、“近视”可以通过配带合适的凸透镜矫正,“远视”可通过配带合适的凹透镜矫正
  二、填空题
  12、如图中物体A的长度是 _________ cm,图中温度计的示数是 _________ ℃.
  13、人坐在橡皮筏上随湍急的河水漂流,人相对河岸是________的,相对________是静止的。
  14、汽车上的电子防盗报警装置,在汽车被撬开时能发出报警声,提醒人们车辆被盗,这是利用了声音可以传递________的特点.除夕之夜,燃放烟花爆竹时,不少汽车由于受到振动使它的报警声响起,此时汽车的报警声和鞭炮声对于已经入睡的人来说是________。
  15、华蓥市举办了几届颇具影响的梨花节。其中有一次,台湾歌手周杰伦也来到了梨花节晚会的舞台上,现场观众能听到他的声音是通过____ _____传播的,能从不同的位置看见他,这是一种光的 现象;当时他身穿紫色T恤,蓝色牛仔裤,如果舞台只用红色灯光照向他时,观众看到他的裤子的颜色是 色。
  16、如图甲所示是现代城市很多路口安装的监控摄像头,它可以拍下违章行驶或发生交通事故时的现场照片。摄像头的镜头相当于一个______透镜,它的工作原理与_______(选填“照相机”、“投影仪”或“放大镜”)相似。如图乙和丙是一辆汽车经过路口时与一辆自行车相撞后被先后拍下的两张照片,由图可以看出汽车是逐渐_____(选填“靠近”或“远离”)摄像头。
  17、“祥云”火炬燃料为丙烷气体,为了便于储存或携带,常温下可采用_____________的方法使其_________。
  18、市场上出售一种“金龙鱼”牌食用调和油,瓶上标有“5L”字样,已知该瓶内调和油的密度为0.92×103kg/m3,则该瓶油的质量为____________kg。
  19、有A、B、C三个由同种材料制成的金属球,它们的质量分别为128g、400g、60g,体积分别为16cm3、50 cm3、12 cm3。在A、B、C三个金属球中,若只有一个是空心的,那么 _______球是空心的,这种材料的密度为___________。
  三、作图题
  20、在扬州古城挖掘过程中,工作人员巧妙地引用太阳光水平照入挖掘隧道,解决了挖掘时的采光问题,如图所示,请画出平面镜的位置,并补全光路;
  21、根据射入和射出的光线,在右图的方框中画出适当的光学器件。
  四、实验探究题
  22、如图甲所示,是“探究物质的熔化规律”的实验装置.实验时先将固体物质和温度计分别放入试管内,再放入大烧杯的水中,观察固体的熔化过程.
  (1)试管内物质在熔化过程中,某时刻温度如图乙所示,读数方法正确的是_____(选填“A”、“B”或“C”),示数为________℃,某同学根据实验记录的数据描绘出该物质的温度随时间变化的图像(如图丙ABCDE),则可知该物质是__________(选填“晶体”或“非晶体”).
  (2)在该物质熔化过程中,如果将试管从烧杯中拿出来,该物质将停止熔化.将试管放回烧杯后,该物质又继续熔化.说明固体熔化时需要_______(选填“吸收”或“放出”)热量.
  (3)根据描绘的图线,该物质在第5min时处于________态,该物质的熔点为________℃,仔细观察图像发现,该物质熔化前(AB段)升温比熔化后(CD段)升温________(选填“快”或“慢”).
  (4)图像中DE段是________过程.
  23、如图所示是探究“光反射时的规律”的实验装置图,把平面镜放在水平桌面上,再把一张可以沿ON向前或向后折的纸板竖直地立在平面镜上,纸板上的ON垂直于镜面。
  (1)能折叠的纸板的作用是: 。
  (2)一束光帖有纸板沿EO射到O 点,光将沿OF方向射出,如果把纸板ON的右半边向折,反射光线将 (填“存在”或“不存在”);如果一束红色激光沿原FO方向射O点,它反射后沿 方向射出。
  实验次数 入射角 反射角
  1 150 750
  2 300 600
  3 450 450
  (3)课后,某同学利用一套实验器材,选择入射角分别为15°、30°、45°的三条光线进行实验,结果得到了不同的数据,如表所示,经经检查,三次实验中各角度的测量值都是准确的,但总结的规律却与反射定律违背,你认为其中的原因应该是
  24、张华和同学到钢铁基地参加社会实践活动,张华拾到一个小金属零件,他很想知道这个零件是什么材料做成的,就把它带回学校利用天平和量筒来测定这个零件的密度.具体操作如下:
  (1)把天平放在___ __上,并将游码移至标尺左端零刻线处;调节天平横梁平衡时,发现指针在分度盘标尺上的位置如图甲所示,此时应将平衡螺母向_____(填“左”或“右”)调节。
  (2)天平平衡时, 砝码的质量及游码在标尺上的位置如图乙所示,则零件的质量为_________g,用量筒测得零件的体积如图丙所示,则零件的体积为___ ___ cm3,由此可算得小金属零件的密度为_________ g/cm3。
  (3)若该零件磨损后,它的密度将_________(填“变大”、“变小” 或“不变”).
  五、计算题
  25、某人站在铁路旁,看见远处的铁路检修工人用小铁锤向铁轨敲了一下,他贴近铁轨,过了一会儿听见了两次敲击声。若两次声音间隔为0.5s,该人离敲击处183.6m,求声音在铁轨中传播的速度是多少米/秒?(已知声音在空气中的传播速度是340m/s)
  26、一辆汽车在平直公路上行驶,在10min内前进6km,停车10min后又以72km/h的速度匀速行驶20min,求(1)汽车停车前的平均速度;(2)汽车在全程中的平均速度。
  27、小明郊游时捡到一块外形不规则的石头.为了测定它的密度,小明称出石头和一个盛满水的容器的质量 分别为0.56kg、2kg,然后将石头轻轻放入容器中,又测出了容器的总质量为2.36kg.(石头吸水不计)求:
  (1)石头的体积;
  (2)石头的密度;
  (3)若石头吸水,所测石头的密度是偏大还是偏小,为什么?
  参考答案
  一、选择题
  1-5:BAABC;6-10:CBAAA;11:BC
  二、填空题
  12、3.10、52;
  13、运动、橡皮筏;
  14、信息、噪声;
  15、空气、漫反射、黑;
  16、凸、照相机、远离;
  17、压缩体积、液化;
  18、4.6;
  19、C、8g/cm3
  三、作图题
  20、 21、凸透镜
  四、实验探究题
  22、(1)B、39、晶体;(2)吸收;(3)固液混合、50、慢;(4)沸腾;
  23、(1)探究反射光线、入射光线、法线是否在同一平面内;
  (2)存在、OE;
  (3)将反射光线与平面镜之间的夹角当做反射角;
  24、(1)水平桌面、右;
  (2)62、20、3.1;
  (3)不变;
  五、计算题
  25、4590m/s
  26、10m/s、12.5m/s
  27、(1)2×10-4m3、(2) 2.8×103m3、(3)偏大。石头吸水后,导致排出水的体积小于石头体积。
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初二物理试卷篇(2):初三 物理试题及答案

  初三物理试题及答案
  一、选择题:本题共12小题,每小题4分,共48分。在每小题给出的四个选项中,有的 只有一个选项正确,有的有多个选项正确,全部选对的得4分,选对但不全的得2 分,有选错的得0分。
  1 .将两个分别带有电荷量-2Q 和+5Q 的相同金属小球 A 、 B 分别固定在相距为r的两处(均可视为点电荷),它们间库仑力的大小为 F .现将第三个与 A 、 B 两小球完全相同的不带电小球 C先后与A、 B 相互接触后拿走, A 、 B 间距离保持不变,则两球间库仑力的大小为
  ( A ) F ( B )5
  1F
  ( C )
  F109 ( D )F4
  1 2.用控制变量法,可以研究影响平行板电容器电容的因素(如图).设两极板正对面积为S,
  极板间的距离为d,静电计指针偏角为.实验中,极板所带电荷量不变,若( )
  A.保持S不变,增大d,则变大 B.保持S不变,增大d,则变小 C.保持d不变,减小S,则变小
  D.保持d不变,减小S,则不变
  3. 如图所示,在a、b两点上放置两个点电荷,它们的电荷量分别为q1、q2,MN是连接两点的直线,P是直线上的一点,下列哪种情况下P点的场强可能为零( )
  A. q1、q2都是正电荷,且q1q2
  B. q1是正电荷,q2是负电荷,且q1

初二物理试卷篇(3):初二下册英语期中试题

  一、听力(共25小题,每小题1分,计25分)
  A. 听下面5段对话。每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项。听完每段对话后,你都将有10秒钟的时间回答有关小题和阅读下一小题。每段对话读两遍。
  ( )1. A. Go camping. B. Do her homework. C. Do some shopping.
  ( )2. A. She is going to Paris. B. She is going to Greece.
  C. She is going to London.
  ( )3. A. Next week. B. On the 21st. C. On the 18th.
  ( )4. A. Going hiking. B. Camping with his friends.
  C. Camping and hiking with his family.
  ( )5. A. She doesn’t like staying there. B. She likes it very much.
  C. She thinks the air there is thin.
  B. 听下面的对话和短文,每段对话和短文后有几个小题,请根据你所听到的内容。从所给的A、B、C三个选项中选出一个适当的答语,将其序号填入题前的括号内。每段对话或短文读两遍。
  听下面第一段对话,回答第6—7小题。
  ( )6. What does Tara’s brother do?
  A. A singer. B. A player. C. An actor.
  ( )7. How long can’t Tara’s brother play basketball?
  A. For three months. B. For a year. C. For a week.
  听下面一段对话,回答第8--9小题。
  ( )8. What do they decide to do next Sunday?
  A. Go to the park. B. Go hiking. C. Go sightseeing.
  ( )9 Where will they meet?
  A. At the school gate. B. At Lucy’s house. C. We don’t know.
  听下面一段对话,回答第10--12小题。
  ( )10. Where is Kevin going this Sunday?
  A. To the beach. B. To the park. C. To the museum.
  ( )11. When is Kevin leaving?
  A. At 7 am. B. At 8 am. C. At 9 am.
  ( )12. What’s Kevin going to do this evening?
  A. To call Mike`s brother. B. To visit Mike’s house.
  C. To join Mike’s team.
  w W w .X k b 1.c O m
  听下面一段对话,回答第13—15小题。
  ( )13. How often does Bill drink milk?
  A. Every morning. B. Every afternoon. C. Every evening.
  ()14. Why does Bill drink milk?
  A. Because he likes it very much.
  B. Because he thinks it is very delicious.
  C. Because his mother wants him to drink it.
  ( )15. What does Bill’s father say about Chinese tea?
  A. Chinese tea is very popular in the world.
  B. Chinese tea is better than any other drink in the world.
  C. Chinese tea is very expensive.
  听下面一段独白,完成16~20题。
  ( )16. What do you think of exercising every day?
  A. It’s very important. B. It’s very relaxed. C. It’s very interesting.
  ( )17. How can you do some exercising according to the passage?
  A. Walking to school. B. Taking the bike. C. Washing the face.
  ( )18. What activity is out-of-class according to the passage?
  A. Swimming. B. Climbing the stairs. C. Cleaning the house.
  ( )19. How can activities make you at school?
  A. Sleep in class. B. Do better in lessons. C. Listen to music.
  ( )20. Why shouldn’t you eat too much junk food?
  A. Because it is awful. B. Because it is expensive. C. Because it is bad for your health.
  请听下面一段短文,根据短文内容完成21-25小题,每个空格不超过3个单词。听短文前你将有50秒钟的时间阅读以下句子。短文读两遍。
  21. It was Saturday.Katy was _______.
  22. She opened the door and found it was________.
  23.She had to carry Mr. King to ________.
  24. Katy read some picture books for Jim and then taught him to ________.
  25. Katy gave Jim ________when he felt hungry.
  二.单项选择(15’)
  ( ) 26. Tell Lingling the news because _____ is your best friend.
  A. his B. him C. she D. her
  ( ) 27. I’d love to help you _____ I’m too busy right now.
  A. and B. but C. or D. so
  ( ) 28. The green sweater is much _____ than the red one.
  A. cheap B. cheaper C. cheapest D. the cheapest
  ( ) 29. There’re some trees on one side of the river, but on _______ side there’s none.
  A. the other B. others C. the others D. another
  ( ) 30. Alan will come if Susan _____ for a longer time.
  A. stay B. will stay C. stays D. staying
  ( ) 31. John ______ playing football to watching TV last Sunday.
  A. prefer B. prefers C. preferring D. preferred
  ( ) 32. Amy_______ books at 15:00 yesterday afternoon.
  A. is reading B. was reading C. reads D. has read
  ( )33. We __________ paper and printing for hundreds of years.
  A. use B. are using C. used D. have used
  ( )34. This famous bridge _________ in 1980s.
  A. was built B. is built C. was building D. is building
  ( ) 35.This is the picture ______ Peter took yesterday afternoon.
  A. who B. where C. whose D. which
  ( ) 36. He’ll send us a message as soon as he ______ in America.
  A. is arriving B. will arrive C. arrived D. arrives
  ( ) 37.It’s time for class now, please stop __________.
  A. talking B. to talk C. to speak D. spoke
  ( )38、I ________ when he knocked at the door.
  A. am cooking B. was cooking C. has cooked D. will
  ( )39、Don’t worry. We have ________ time to leave.
  A. little B. a little C. few D. a few
  ( )40. Can you please tell me _____________________?
  A. where was the newspaper B. where the newspaper was
  C. where is the newspaper D. where the newspaper is
  三,完形填空(25分)
  A)阅读下面短文,掌握其大意,然后从各小题所给的四个选项中选出最佳答案。
  Bill’s supermarket
  Open
  7 D A Y S A W E E K
  8:00—8:00
  There was a woman in Detroit, who had two sons. She was worried about them, especially the younger one, Ben, 41____ he was not doing well in school. Boys in his class made joked about him because he seemed so 42____.
  The mother 43____ that she herself would have to get her sons to do better in school. She told them to go to the Detroit Public Library to read a 44____ a week and do a report about it for her.
  One day, in Ben’s 45____, the teacher held up a rock and asked if anyone knew it. Ben put up his hand and the teacher let him 46____. Why did Ben raise his hand? They wondered. He 47____ said anything, what could he possibly want to say?
  Well, Ben not only 48____ the rock; he said a lot about it. He named other rocks in its group and even knew 49____ the teacher had found it. The teacher and the students were 50____. Ben had learned all this from doing one of his book 51____.
  Ben later went to the 52____ of his class. When he finished high school, he went to Yale University and at last became one of the best doctors in the United States.
  After Ben grew up, he 53____ something about his mother that he did not know as a 54____ .
  She, herself, had never learned how to 55____.
  ( ) 41. A. because B. so C. but D. though
  ( ) 42. A. clever B. bad C. slowly D. quick
  ( ) 43. A. asked B. decided C. forgot D. heard
  ( ) 44. A. notice B. message C. book D. question
  ( ) 45. A. class B. room C. office D. lab
  ( ) 46. A. think B. leave C. stand D. speak
  ( ) 47. A. always B. even C. quickly D. never
  ( ) 48. A. found B. played C. knew D. threw
  ( ) 49. A. whether B. when C. where D. why
  ( ) 50. A. afraid B. surprised C. worried D. unhappy
  ( ) 51. A. pictures B. exercises C. shops D. reports
  ( ) 52. A. top B. endC. back D. side
  ( )53. A. learned B. remembered C. understood D. guessed
  ( ) 54. A. doctor B. child C. student D. teacher
  ( ) 55. A. read B. work C. teach D. show
  B)请先阅读下面短文,掌握其大意,然后从方框中所给的词中选出最恰当的10个,用其适当形式填空,并将答案填写到答题卷的相应位置。每个词限用一次。(每小题1分)
  parent, tell, call, celebrate, talk, together, why, start, because, after, shop, newspaper
  Most people buy lots of presents just before Christmas. But some people think we buy too much. They start a special day 1 Buy Nothing Day. They don’t want anyone to go 2 on that day. Buy Nothing Day is on November 29. It is 3 Thanksgiving. Often, before Christmas we see many ads. in 4 and on TV 5 us to“buy, buy, buy!”The idea for Buy Nothing Day 6 in Vancouver, Canada. Now people all over the world 7 Buy Nothing Day. In California, the U.S., 8 and children get 9 to read stories, sing songs and draw pictures. The children talk about 10 they can’t get many toys.
  56. _______ 57. _______ 58. _______ 59. _______ 60. _______
  61. _______ 62. _______ 63. _______ 64. _______ 65. _______

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