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【免费下载】精编江苏省扬州市高邮市城北中学等20222023学年八年级下学期5月月考物理试题

  • 2026-02-16 15:45:15
【免费下载】精编江苏省扬州市高邮市城北中学等20222023学年八年级下学期5月月考物理试题

20222023学年第二学期阶段练习

一、选择题(本题共12小题,每小题2分,共24分.每小题只有一个选项符合题意)

1. 下列数据中,最接近生活实际的是(  )

A. 一个鸡蛋的重力大约为5N

B. 一名初中学生的体积约为600dm3

C. 教室内空气质量约为5kg

D. 一中学生双脚站立对地面的压强是1.5×104Pa

2. 据悉,中国第五代隐身歼击机﹣歼20已经装备部队,歼20首次使用了我国自主研制的具有坚固、轻巧、美观、易于加工等特点的钛锂合金板材,选用这种材料与下列哪个物理属性无关(  )

A. 硬度B. 密度C. 导电性D. 延展性

3. 古诗词往往蕴含丰富的物理知识,在下列诗词中能体现“分子动理论”的是(  )

A. 水晶帘动微风起,满架蔷薇一院香B. 姑苏城外寒山寺,夜半钟声到客船

C. 去年今日此门中,人面桃花相映红D. 两岸青山相对出,孤帆一片日边来

4. 关于粒子和宇宙,下列认识中正确的是(  )

A. 谱线“红移”现象说明星系在逐渐靠近我们

B. 摩擦起电的实质是电子从一个物体转移到另一个物体

C. 物质是由大量分子组成的,分子是不可再分的最小粒子

D. 英国物理学家汤姆生发现了原子核,从而说明原子可再分

5. 我国传统节日端午节要到了,赛龙舟是节日里最有意义一个活动。如图所示,队员们拿着船桨奋力向后划水,龙舟向前直冲。使龙舟前进的力的施力物体是(  )

A. B. 龙舟C. 运动员D. 船桨

6. 科学研究中常用图像来表示两个量(x,y)之间的关系,以使研究的问题变得直观明了,下列两个量之间的关系不符合如图所示的是(  )

A. 物质的密度与质量的关系

B. 物体受到的重力与质量的关系

C. 在一定范围内,弹簧的伸长量与所受拉力的关系

D. 同种物质质量与体积的关系

7. 如图所示,用6N的水平拉力F拉动物体A在水平地面上向右匀速运动,物体B静止不动,弹簧测力计示数为2N,下列说法正确的是

A. A对B摩擦力大小为4N,方向水平向右

B. B对A的摩擦力大小为2N,方向水平向右

C. 地面对A的摩擦力大小为4N,方向水平向左

D. 地面对A的摩擦力大小为6N,方向水平向左

8. 如图所示,在“探究二力平衡的条件”时,选小卡片作为研究对象,在线的两端分别挂上钩码,对卡片施加两个拉力。为探究这两个力满足什么条件才能平衡,则下列说法正确的是(

A. 应该选用质量较小钩码

B. 实验过程中,应该使卡片处于静止状态

C. 卡片两侧的滑轮的高度一定相同

D. 为了研究一对平衡力是否必须作用在同一物体上,可以将卡片进行旋转

9. 如图所示,水平桌面上放有底面积和质量都相同的甲、乙两平底容器,分别装有深度相同、质量相等的不同液体,下列说法正确的是(

A. 液体的密度:ρρ

B. 液体对容器底部的压强:pp

C. 容器对桌面的压力:FF

D. 容器对桌面的压强:p甲’p乙’

10. 2022324日,王亚平在太空做了抛冰墩墩实验,如图所示,下列说法中正确的是(  )

A. 由于是在太空中,抛出的冰墩墩没有质量

B. 抛出的冰墩墩在太空中受到的重力增大

C. 抛出的冰墩墩没有惯性

D. 抛出的冰墩墩不受重力和阻力作用,沿抛出的方向做匀速直线运动

11. 同学们梳理了与压强知识相关的实验,如图所示,其中分析正确的是(  )

A. 甲图,装有水的瓶子竖放在海绵上,瓶中水越少,海绵凹陷越明显

B. 乙图,当压强计的探头在水中的深度逐渐增大时,U形管两边液面高度差变小

C. 丙图,测出拉开吸盘时大气对吸盘的压力和吸盘的面积,可估测大气压强的值

D. 丁图,向外拉活塞,试管内停止沸腾的水再次沸腾,可知气压减小,水的沸点升高

12. 在光滑水平面上有一物块受水平力F的作用而运动,在其正前方固定一个足够长的轻质弹簧,如图所示,当物块与弹簧接触并将弹簧压至最短的过程中,下列说法正确的是(  )

A. 物块接触弹簧后即做减速B. 物块接触弹簧后先加速后减速

C. 当物块的速度最大时,它受非平衡力D. 当物体速度为零时,将保持静止

二、填空题(本题共10小题,每空1分,共28分)

13. 根据分子动理论相关知识,回答下列几个问题:

1)图甲:将红墨水滴入水中,过一会儿水变红了,这是___________现象,说明分子在___________

2)图乙:将两个表面光滑的铅块相互紧压后,很难被拉开,说明分子间存在___________

3)图丙:气球膨胀时任意两颗小塑料粒之间的距离都在变大,模拟星系在远离我们而去,它提供了宇宙___________(选填“膨胀”或“塌缩”)的证据。

14. 在地球上的物体都会受到重力的作用,重力的施力物体是______;如图甲所示,建筑工人利用重垂线可以判断砌好的墙是否符合标准,这是利用了重力的方向总是______的知识。如图乙所示,门把手一般装在距离门轴较远的位置,便于打开门,这是说明力的______会影响力的作用效果。

15. 卢瑟福提出了原子核式结构模型,认为原子由原子核和___________组成的;将一根塑料绳一端扎紧,把绳尽可能撕成细丝,用手从上向下捋几下,观察到细丝张开了,这是因为细丝带上了___________电荷而相互排斥,这种是塑料丝带电的方法称为___________

16. 小明用天平和烧杯测量某种消毒液的密度,并绘制了如图所示的mV图像,其中m为烧杯和杯中消毒液的总质量,V为烧杯中消毒液的体积,根据图像分析,消毒液的密度为_________g/cm3;烧杯的质量为_________g

17. 100cm3的水与100cm3的酒精充分混合后,可以发现,充分混合后水与酒精的总体积小于混合前水与酒精的体积之和,这一现象说明______,测得混合液体的总质量为180 g,则混合液体的密度______(选填“小于”、“等于”或“大于”)0.9×103 kg/m3

18. 风沿着教室窗外的走廊吹过时,窗口悬挂的窗帘飘向窗___________(选填“内”或“外”),这是因为空气的流速越大,

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  1. CONNECT:[ UseTime:0.000581s ] mysql:host=127.0.0.1;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000741s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000285s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000308s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000542s ]
  6. SELECT * FROM `set` [ RunTime:0.000212s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000559s ]
  8. SELECT * FROM `article` WHERE `id` = 468831 LIMIT 1 [ RunTime:0.000501s ]
  9. UPDATE `article` SET `lasttime` = 1771295832 WHERE `id` = 468831 [ RunTime:0.003262s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000293s ]
  11. SELECT * FROM `article` WHERE `id` < 468831 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000620s ]
  12. SELECT * FROM `article` WHERE `id` > 468831 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000707s ]
  13. SELECT * FROM `article` WHERE `id` < 468831 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004491s ]
  14. SELECT * FROM `article` WHERE `id` < 468831 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003355s ]
  15. SELECT * FROM `article` WHERE `id` < 468831 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005870s ]
0.093116s