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)
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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
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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