人教版小学科学三年级下册期末试卷_小学下册科学期末试卷

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2014小学三年级下册科学期末试卷

一、填空题（每空1分，共10分）

1、植物在它的生命过程中都要经历________、成长、繁殖、衰老直至________的过程。

2、动物都要经历出生、___________、________、死亡四个阶段。

3、物体的冷热程度叫温度，通常用摄氏度（_____）来表示。

4、测量温度的仪器叫做____________。

5、水在自然界中有不同的形态，分别是液态、_____态和_____态。

6、实验室里的磁铁形状有______形、______形和蹄形几种。

二、判断题（在你认为正确的答案后面画√，错误的画×，每题2分，共20分）

1、“一年之计在于春”，春天是播种的好季节。······························································()

2、植物的根总是向下生长。······························································································()

3、叶可以为植物提供养料。······························································································()

4、植物叶可以吸收氧气，放出二氧化碳。······································································()

5、蚕的一生要只蜕一次皮。······························································································()

6、蚕的一生经历了蚕、蛹、蛾、卵四个阶段。······························································()

7、温度计都是测量温度的，所以可以通用。··································································()

8、夏天冰箱冷冻室结冰是因为冷冻室温度低于0℃。···················································()

9、磁铁能吸引铁质物体的性质叫磁性。··········································································()

10、磁铁的磁力大小是可以变化的。················································································()

三、选择题（将正确答案序号填入括号中。每题2分，共20分）

()

1、水变成水蒸气的过程叫做______。

①升华②蒸发③凝固④融化

()

2、种子萌发先生根，再______。

①发芽②长茎③长叶

()

3、有植物茎的描述错误的是______。

①茎具有支撑作用②茎可以运输水分

③茎长出来后就不会变化了④茎可以运输养料

()

4、蚕爱吃______。

①树叶②干燥的桑叶③湿润的桑叶④新鲜的树叶

()

5、养蚕、抽取蚕丝织成丝绸起源于______。

①中国②巴比伦③埃及④印度

()

6、测量水温时错误的操作方法有______。

①手拿温度计的上端②将温度计下端浸入水底

③视线与温度计液面持平④读数时温度计不能离开被测的水

()

7、今天的气温大约30℃，那么自来水的温度大约是______℃。

①45②0③60④25

()

8、用磁铁的磁极沿同一个方向摩擦钢针、铁片、铁钉，摩擦次数______时磁性更强。

①越多②越少③多少没有影响

()

9、下面表示磁极之间关系正确的是______。

①S←→N②S→←S③N→←N④N→←S

()

10、我们可以用实验的方法测出环形磁铁的南北极吗？

①可以②不可以③不好确定