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【单元测试卷下载】教科版三年级科学上册第二单元《水》-D卷-实战模拟

  • 2026-10-08 04:07:02
【单元测试卷下载】教科版三年级科学上册第二单元《水》-D卷-实战模拟

教育科学出版社《科学》三年级上册 · 第二单元 水 

第二单元 水 单元测试卷

D 卷 · 实战模拟 | 全真模拟 · 冲刺满分 

满分 100 分 · 建议 40 分钟

班级:

姓名:

学号:

得分:

D 卷 · 实战模拟 全真模拟 · 冲刺满分

  一、快乐选择(每小题 3 分,共 30 分)

1.关于水的三态,说法错误的是(  )。

A.水蒸气是白色的  B.冰是水的固态  C.水是液态  D.水蒸气是气态

2.湿衣服在(  )干得最快。

A.向阳、通风且摊开  B.阴暗的角落叠放着  C.塑料袋里  D.抽屉里

3.从冰箱里拿出的饮料瓶,外壁的水珠来自(  )。

A.瓶子漏出的水  B.空气中的水蒸气  C.手上的汗水  D.瓶子本身的材料

4.在一般情况下,水沸腾时的温度大约是(  )。

A.0℃  B.50℃  C.100℃  D.200℃

5.水结冰时的温度是(  )。

A.0℃  B.10℃  C.50℃  D.100℃

6.冰熔化时(  )。

A.吸收热量,温度保持 0℃  B.放出热量,温度升高  C.既不吸热也不放热  D.温度不断升高

7.一定量的水中能溶解的食盐是(  )。

A.无限多的  B.有限的  C.只有一粒  D.不能溶解的

8.下面能加快溶解的做法是(  )。

A.用热水并搅拌  B.用冷水且不搅拌  C.把水倒掉一半  D.把方糖整块放进冷水

9.过滤时,玻璃棒的作用是(  )。

A.搅拌  B.引流  C.加热  D.固定滤纸

10.要把食盐从盐水中分离出来,应该(  )。

A.加热蒸发水分  B.用过滤的方法  C.放在太阳下冻住  D.用玻璃棒搅拌

  二、对错判断(对的画“√”,错的画“×”。每小题 2 分,共 20 分)

1.水蒸气是无色透明、看不见的气体。(  )

2.水在任何温度下都能蒸发。(  )

3.水沸腾以后继续加热,温度会继续升高。(  )

4.水结冰以后体积会变小。(  )

5.冰熔化过程中温度保持不变。(  )

6.不同物质在水中的溶解能力是相同的。(  )

7.搅拌、加热、碾碎都能加快溶解。(  )

8.食盐溶解在水中以后,还能用蒸发的方法分离出来。(  )

9.过滤时,液面可以高于滤纸边缘。(  )

10.水是宝贵的资源,我们应该节约用水。(  )

  三、轻松填空(每空 2 分,共 20 分)

1水变成了

2水蒸气遇冷会

3水沸腾时的温度叫

4水的沸点是℃。

5水结冰时的温度是℃。

6冰变成水的过程叫

7液态和

8不同物质在水中的

9只能改变

10可以用

  四、综合应用(阅读材料,回答问题。共 15 分)

小明把一只装满水的玻璃瓶拧紧盖子,放进冰箱冷冻室。第二天拿出来一看,瓶子竟然被撑裂了。

1.瓶子为什么会被撑裂?

2.生活中还有哪些类似的现象?请举出一个例子。

3.如果要把一瓶水放进冷冻室,应该注意什么?

  五、探究创新(共 15 分)

1.设计一个“水的变化”观察记录:把一杯水放在窗台上,连续观察三天,记录水位的变化并解释原因;再写一写你还能用什么方法让水蒸发得更快。

______________

______________

第二单元 水 单元测试卷(D 卷 · 实战模拟)· 参考答案与解析

  一、快乐选择

1.A  2.A  3.B  4.C  5.A  6.A  7.B  8.A  9.B  10.A

1)水蒸气无色透明,看不见。;2)向阳、通风、摊开都能加快蒸发。;3)空气中的水蒸气遇冷凝结在瓶壁上。;4)水的沸点约为 100℃。;5)水在 0℃ 时结冰。;6)冰熔化时吸收热量,温度保持 0℃ 不变。;7)一定量的水溶解食盐的能力有限。;8)提高水温并搅拌能明显加快溶解。;9)玻璃棒在过滤时用来引流。;10)蒸发掉水分,食盐就结晶析出。

  二、对错判断

1.√  2.√  3.×  4.×  5.√  6.×  7.√  8.√  9.×  10.√

  三、轻松填空

1

水蒸气

2

凝结

3

沸点

4

100

5

0

6

熔化

7

气

8

溶解

9

一

10

过滤

  四、综合应用

1.水结冰以后体积会变大,把瓶子撑裂了。2.示例:冬天户外的水管、水缸容易冻裂;装满水的玻璃瓶放在冷冻室会破裂。3.不要把水装得太满,要留出空间(或改用塑料瓶、拧松盖子)。

  五、探究创新

1.答案示例:每天同一时间用尺子量一量水面到杯口的距离,记在表格里。发现水位一天天下降,因为水不断蒸发变成水蒸气跑到空气中。加快蒸发的方法:把水倒进更大的浅盘子里增大表面积、放在向阳通风的地方、用扇子扇或者用风吹(也可以用温水)。

【文档下载】

水-D卷-实战模拟.docx

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  138. /www/wwwroot/www.sjds.net/vendor/topthink/think-template/src/template/contract/DriverInterface.php ( 0.86 KB )
  139. /www/wwwroot/www.sjds.net/runtime/temp/022a5b1eae5a9e3c31e54f699d8ae600.php ( 8.05 KB )
  140. /www/wwwroot/www.sjds.net/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000581s ] mysql:host=172.18.0.4;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000585s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000397s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000421s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000566s ]
  6. SELECT * FROM `set` [ RunTime:0.000282s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000688s ]
  8. SELECT * FROM `article` WHERE `id` = 520622 LIMIT 1 [ RunTime:0.000363s ]
  9. UPDATE `article` SET `lasttime` = 1791406552 WHERE `id` = 520622 [ RunTime:0.001818s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000318s ]
  11. SELECT * FROM `article` WHERE `id` < 520622 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000425s ]
  12. SELECT * FROM `article` WHERE `id` > 520622 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000371s ]
  13. SELECT * FROM `article` WHERE `id` < 520622 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000673s ]
  14. SELECT * FROM `article` WHERE `id` < 520622 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000634s ]
  15. SELECT * FROM `article` WHERE `id` < 520622 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000577s ]
0.085675s