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【免费下载】精编天津市建华中学20222023学年八年级上学期期中物理试题

  • 2026-01-12 13:22:25
【免费下载】精编天津市建华中学20222023学年八年级上学期期中物理试题

(八上)物理统练

一、单项选择题(本大题共

二、10小题,每小题3分,共30分)

1.

2.列对一些常见物体的估测最恰当的是(  )

A. 声音的传播速度一定为340m/sB. 物理课本长度约26cm

C. 人正常步行的速度约为5m/sD. 人的脉搏跳动1次约为2s

2. 于娜同学用刻度尺先后四次测量同一物体的长度如下:8.98cm、8.99cm、8.56cm、8.97cm.那么,更接近于物体真实长度的值是

A. 8.87cmB. 8.88 cm

C. 8.98 cmD. 8.99 cm

3. 从匀速直线运动的公式可知,以下叙述正确的是(  )

A. 速度与路程成正比

B. 速度与时间成反比

C. 速度随时间或路程的改变而改变

D. 做匀速直线运动的物体的速度与时间或路程无关

4. 夏天,盛一盆水,在盆里放两块高出水面的砖头,砖头上搁一只比盆小一点的篮子。篮子里有剩饭、剩菜,再把一个纱布袋罩在篮子上,并使袋口的边缘浸入水里(如图所示),就做成了一个“简易冰箱”。即使经过一天时间里面的饭菜也不会变质,与“简易冰箱”的工作原理相同的是(  )

A. 吃冰棒解热

B. 在中暑病人额头上擦酒精

C. 烧开水时冒“白气”

D. 衣箱中的樟脑丸逐渐变小

5. 笛子爱好者小亮在午休期间吹起了他心爱笛子,悠扬的笛声传遍宿舍楼,对此下列说法正确的是(

A. 悠扬的笛声是笛子振动发出的

B. 笛声在传播过程中速度越来越慢

C. 因为笛声悠扬,所以小亮的笛声不是噪声

D. 按住不同的笛孔发声的音调会改变

6. 如图是“探究某物质熔化和凝固规律”的实验图像,下列说法正确的是(  )

A. 在t=5min时,该物质全部处于液态

B. 在BC段,该物质不吸热

C. 该物质凝固过程持续了5min

D. 该物质的凝固点是45℃

7. 鲁迅的《社戏》中有这样的描写:“淡黑的起伏的连山,仿佛是踊跃的铁的兽脊似的,都远远地向船尾跑去了……”,其中“山……向船尾跑去了”所选的参照物是

A. 船B. 山C. 河岸D. 岸边树木

8. 下列现象发生的过程中,吸收热量的一组是(  )

春天,冰雪融化汇成溪流

夏天,从冰箱里面拿出来的饮料罐“出汗”

秋天,清晨的雾在太阳出来后散去

冬天,室外草地上出现了霜。

A. ①②B. ②④C. ③④D. ①③

9. 如图所示声波的波形图,下列说法正确的是(  )

A. 甲、丁两者的音调和响度均相同

B. 甲、乙两者的响度和音色均不同

C. 丙、丁两者的音调和响度均不同

D. 甲、丙两者的响度和音调相同

10. 某物体从地面上某一点出发沿直线运动,其s-t图像如图所示。对物体的运动情况进行分析,得出结论错误的是(  )

A. 物体在9s内运动的路程为18mB. 物体在前3s内和后3s内的速度相等

C. 以地面为参照物,物体在中间3s内静止D. 物体在9s内的平均速度为2m/s

二、多项选择题(本大题共3小题,每小题3分,共9分)每小题给出的四个选项中,均有多个选项符合题意,全部选对的得3分,选对但不全的得1分,不选或选错的得0分。

11. 如图a,在平直高速公路上的某时刻,甲、乙两车相距s,经过时间t后,两车距离变为s1s1<s)。两车的s-t图象如图b所示。下列有关说法正确的是(

A. b图线表示的是甲车的运动情况

B. t时刻一定在图b中的t0时刻之前

C. t时刻可能在图bt0时刻之前

D. b中的t0时刻表示甲乙两车此时的速度相等

12. 无论是严冬还是酷暑,在使用冷暖空调的房间窗户玻璃表面,有时都会出现小水珠关于这种现象的说法中正确的是(  )

A. 夏天,小水珠附着在玻璃的内表面

B. 夏天,小水珠附着在玻璃的外表面

C. 冬天,小水珠附着在玻璃的内表面

D. 冬天,小水珠附着在玻璃外表面

13. “二十四节气”是中华民族智慧的结晶,2016年被正式列入联合国教科文组织人类非物质文化遗产代表作名录。关于二十四节气的谚语,下列分析正确的是(  )

A. “惊蛰云不停,寒到五月中”,云形成是升华现象,升华吸热

B. “小寒冻土,大寒冻河”,河水结冰是凝固现象,凝固放热

C. “霜降有霜,米谷满仓”,霜的形成是凝华现象,凝华放热

D. “伏天三场雨,薄地长好麻”,雨的形成是液化现象,液化吸热

三、填空题(本大题共6小题,每小题4分,共24分)

14. 如图所示,用刻度尺测木棒的直径是______。停表的示数是______秒。

15. 暴雨前,常会电闪雷鸣,其中雷声是由于云团之间放电引起空气剧烈________产生的;如果看到闪电3s后才听到雷声,已知当时气温为25℃,声音在空气中的传播速度为340m/s,闪电处距人约________(不计光的传播时间)。

16. 一物体在内振动了180000次,则该物体振动的频率为________。人耳________(填“能”或“不能”)听到它振动所发出的声音。

17. 实施人工增雨的一种方法是飞机在高空撒干冰(固态二氧化碳),干冰进入云层,很快________成气体,并从周围吸收大量的热,于是高空水蒸气便________成小冰晶,使云中的冰晶增多,小水滴增大,从而形成降雨。(填物态变化的名称)

18. 图甲中体温计的示数是______,它是根据水银的______规律制成的。

19. 如图上图是在高速公路上用超声波测速仪测量车速的示意图,测速仪发出并接收超声波脉冲信号,根据发出和接收到的信号间的时间差,测出被测物体的速度。下图中p1p2是测速仪发出的超声波信号,n1n2分别是p1p2由汽车反射回来的信号。设测速仪匀速扫描,p1p2之间的时间间隔Δt=1.0s,超声波在空气中传播的速度是v=340m/s,若汽车是匀速运动的,则根据下图可知,汽车在接收到p1p2两个信号之间的时间内前进的距离是______m,汽车的速度是______m/s

五、综合题(本大题共6小题,共37分)解题中要求有必要的分析和说明,计算题还要有公式及数据代入过程,结果要有数值和单位。

20. 一辆汽车以14m/s 的速度正对山崖行驶,鸣笛后2s听到回声,声音在空气中的速度为340m/s,求:

(1)汽车在这段时间内行驶的路程;

(2)鸣笛处距高山崖多远;

(3)听到回声时,汽车距山崖多远?

21. 为了探究冰熔化和水沸腾时温度的变化规律,君君同学进行了如下操作:

通过网盘分享的文件:【免费下载】精编天津市建华中学20222023学年八年级上学期期中物理试题

链接: https://pan.baidu.com/s/1FGUXshzFj4tuRSIJcMPd_w?pwd=4321 提取码: 4321 

--来自百度网盘超级会员v8的分享

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  1. CONNECT:[ UseTime:0.000608s ] mysql:host=127.0.0.1;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000820s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000256s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000240s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000585s ]
  6. SELECT * FROM `set` [ RunTime:0.000194s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000629s ]
  8. SELECT * FROM `article` WHERE `id` = 460667 LIMIT 1 [ RunTime:0.004793s ]
  9. UPDATE `article` SET `lasttime` = 1768217634 WHERE `id` = 460667 [ RunTime:0.000616s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000225s ]
  11. SELECT * FROM `article` WHERE `id` < 460667 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000410s ]
  12. SELECT * FROM `article` WHERE `id` > 460667 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000464s ]
  13. SELECT * FROM `article` WHERE `id` < 460667 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.022647s ]
  14. SELECT * FROM `article` WHERE `id` < 460667 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.062907s ]
  15. SELECT * FROM `article` WHERE `id` < 460667 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.036686s ]
0.200700s