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【免费下载】精编安徽省阜阳市界首实验中学20222023学年八年级上学期月考物理试题

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【免费下载】精编安徽省阜阳市界首实验中学20222023学年八年级上学期月考物理试题

学年安徽省阜阳市界首实验中学八年级(上)月考物理试卷

一、填空题(每空2分,共30分)

1. 2022年夏秋之际,我省大部分地区久旱无雨,人们常在室内或院子里洒水,这样既能使空气湿润,又能降温,但过一会儿地面上的水就不见了。地面变干的主要原因是水发生了___________(填物态变化的名称)。

2. 为了测量某一品牌导线的直径,小红采用了以下办法:剪下一段导线后,把这段导线紧密地单层排绕在一根铅笔上,排绕n圈,形成一个导线圈,再用两把刻度尺甲和乙分别测量这个导线圈的长度,测量情况如图所示,其中_____(选填“甲”或“乙”)刻度尺测量的结果更精确。若测得导线圈的长度为L,则该品牌导线的直径为_____(用相关的符号表示)。

3. 小红在实验室测量盐水的密度。她用调节好的天平测量烧杯和盐水的质量,天平平衡时,砝码的使用情况和游码所在的位置如图甲所示,则盐水和烧杯的总质量是___________g。将烧杯中的部分盐水倒入量筒,如图乙所示,然后测得烧杯和剩余盐水的质量为45.4g,则所测得的盐水密度为___________kg/m3

4. 小亮早上坐公交车上学时,观察到路旁的树木飞快地向后退。若以公交车为参照物,则小亮是___________(选填“运动”或“静止”)的。小亮认为路旁的树木在运动,所选择的参照物是___________

5. 在某次奥运会上,我国游泳运动员张雨霏获得女子200m蝶泳金牌。如图甲所示,在紧张的比赛过程中,观众以______的方法判定谁游得最快。如图乙所示,当比赛结束时,裁判以______的方法判定谁游得最快。(两空均选填“相同时间比路程”或“相同路程比时间”)

6. 声音在15℃的空气中的传播速度为340m/s,“340m/s”的物理意义是______ 。

7. .乙两物体做匀速直线运动,若甲.乙的速度之比为,通过的路程之比为,则甲乙两物体所用的时间之比为______

8. 如图所示,将电铃扣在抽气盘上的玻璃钟罩内,通电后看到电铃振动,听到电铃发出的声音,此时的声音主要是通过___________传播到人耳的。接着用抽气机抽钟罩内的空气,在抽气的过程中,可以看到电铃仍在振动,但电铃的声音逐渐变小。如果将钟罩内抽成真空,我们将不能听到电铃发出的声音,这个现象说明了___________

9. 音叉不仅可以用在物理实验中,还可以用在乐器调音,演奏音乐,测试听力等方面。如图所示的是一套能发出不同频率的声音的音叉,其中发出声音的音调最高的是标有______Hz的音叉。

10. 科大讯飞是专业从事智能语音的高科技企业,曾经通过声音复刻技术帮助一个女孩实现了“留住爸爸的声音”的心愿,让她再次听到爸爸那熟悉的声音。声音复刻技术主要是模仿声音的______(选填声音的特性)。

二、选择题(每小题3分,共24分;每小题给出的四个选项中,只有一个选项符合题意)

11. 下列关于一些物理概念的说法中,错误的是(  )

A. 温度是用来表示物体冷热程度的物理量

B. 速度的大小等于物体在单位时间内通过的距离

C. 物体的质量一般不随物体位置的变化而变化

D. 密度越大的物体,质量越大

12. 小明对某一固态物体加热直至沸腾,并根据记录的数据绘制了温度随时间变化的图像,如图所示。下列分析中正确的是(  )

A. 该物质在BC段为固态,DE段为气态

B. 该物质熔化过程所用的时间为6min

C. 该物质只在AB段和CD段吸热

D. 该物质的熔点是0℃,沸点是100

13. 往一个桶里装酒精,最多能装8kg酒精。现在用该空桶盛一些水,水结冰后冰面与桶口刚好相平。在冰完全融化时,要使桶恰好装满,则需要再倒入水的质量是(ρ=1.0×103kg/m3,ρ酒精=0.8×103kg/m3,ρ=0.9×103kg/m3)(  )

A. 2kgB. 1kgC. 0.9kgD. 0.5kg

14. “频闪摄影”是研究物体运动时常用的一种实验方法。下列选项是明明同学利用频闪照相机拍摄的四个物体运动时的频闪照片(黑点表示物体的像),其中表示物体可能做匀速直线运动的是(  )

A. B. C. D. 

15. 如图所示的是古代青铜“鱼洗”,注入半盆水后,用双手搓把手,会发出嗡嗡声,盆内水花四溅。传说众多“鱼洗”发出的声音能汇集成千军万马之势,曾吓退数十里外的敌军。下列分析中错误的是(  )

A. “水花四溅”说明发声“鱼洗”正在振动

B. 发出嗡嗡声的声源是“鱼洗”

C. “鱼洗”发出的声音能在空气中传播

D. 众多“鱼洗”发出的声音汇集使声音的传播速度加快

16. 二胡是我国传统乐器。以演奏二胡为例,关于声音的特性,下列说法中正确的是(  )

A. 演奏二胡时用不同的手指按弦,是为了改变音调

B. 用大小不同的力来摩擦二胡的弦,是为了改变音调

C. 人们可以根据所演奏歌曲的响度来判断这是二胡发出的声音

D. 距离二胡远近不同的人听到二胡声音的音色不同

17. 声波能直观地反映声音的特性。如图所示的是四种声音的波形图,下列说法中正确的是(  )

A. 甲和乙的音色相同B. 甲和丙的音调相同

C. 乙和丙的响度相同D. 乙和丁的响度相同

18. 保护环境,人人有责。下列措施中,在传播过程中减弱噪声的是(  )

A. 在城市重点区域安装噪声监测仪

B. 公共场所禁止大声喧哗

C. 在高速公路两旁安装隔音板

D. 机场工作人员佩戴耳塞

三、实验题(每空2分,共24分)

19. 为了研究物质的某种物理属性,同学们找来大小不同的蜡块和干松木做实验,得到的数据如表所示。

实验序号

蜡块

干松木

体积V/cm3

质量m/g

体积V/cm3

质量m/g

1

10

9

10

5

2

20

18

20

10

3

30

27

30

15

4

40

36

40

20

1)分析表格中的实验数据可知,同种物质组成的不同物体,其质量与体积的比值___________;不同物质组成的物体,其质量与体积的比值___________(以上两空均选填“相同”或“不同”)。物理学中将质量与体积的比值定义为物质的___________(填写物理量的名称和符号);

2)本实验测量多组数据的目的是___________

20. 如图所示的是“测量小车的平均速度”的实验。实验时让小车从斜面的A点由静止滑下,分别测出小车到达B点和C点的时间即可求出不同路段的平均速度。

1)实验原理______

2)实验时,为了使小车在斜面上运动的时间长一些,便于测量时间,应______(选填“增大”或“减小”)斜面的倾斜角度;

3)小车在AC段的平均速度vAC=______m/s

4)小车在斜面上是否做匀速直线运动?给出你的判断并通过实验中的测量数据分析说明_______

21. 小安用如图所示的器材探究声音的特性。

1)改变刻度尺伸出桌边的长度,用相同的力拨动,能观察到尺子振动的快慢不同,同时听出声音的___________(选填声音的特性)发生了变化;

2)保持刻度尺伸出桌边的长度不变,用大小不同的力拨动,能观察到尺子振动的幅度不同,同时听出声音的___________(选填声音的特性)发生了变化,这说明声音的这个特性与物体振动的___________有关;

3)小安在本次实验中主要运用的物理方法为___________法。

四、计算与推导题(第22小题8分,第23小题6分,第24小题8分,共22分;解答要有必要的公

22. 新学期学校特色课程开设了毛笔书法学习班,小安的妈妈从安徽歙县购买了一方歙砚(如图所示),让小安练习毛笔字,并且带回来一小块制作砚台时脱落下来的小石块。小安用天平测出小石块的质量为240g,再把小石块放入装满水的溢水杯中,测得溢出水的质量是80g。(ρ=1.0×103kg/m3

1)小石块的体积是多少?

通过网盘分享的文件:【免费下载】精编安徽省阜阳市界首实验中学20222023学年八年级上学期月考物理试题

链接: https://pan.baidu.com/s/1WgkhylNJjCWiTwuEh5MQTw?pwd=4321 提取码: 4321 

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  1. CONNECT:[ UseTime:0.001019s ] mysql:host=127.0.0.1;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001627s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000702s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000668s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001277s ]
  6. SELECT * FROM `set` [ RunTime:0.000614s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001422s ]
  8. SELECT * FROM `article` WHERE `id` = 469355 LIMIT 1 [ RunTime:0.004379s ]
  9. UPDATE `article` SET `lasttime` = 1771641216 WHERE `id` = 469355 [ RunTime:0.018300s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.001553s ]
  11. SELECT * FROM `article` WHERE `id` < 469355 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001136s ]
  12. SELECT * FROM `article` WHERE `id` > 469355 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001110s ]
  13. SELECT * FROM `article` WHERE `id` < 469355 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001545s ]
  14. SELECT * FROM `article` WHERE `id` < 469355 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001350s ]
  15. SELECT * FROM `article` WHERE `id` < 469355 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002344s ]
0.212790s