请问谁小学六年级科学复习试卷?
请问谁小学六年级科学复习试卷? 急呀!我把分给你们了!
推荐回答(1个)
小学六年级科学试卷
一、填空:(每空1分,共22分)
1、动、植物的生活环境包括、、等。
2、在1800年前,我国的科学家发明了世界上第一台监测地震的仪器。
3、高山上的岩石在作用下崩落下来,在河水的过程中,受到水的和相互,形成了卵石。
4、常见的传动装置有:、、。
5、电磁铁通电时有,切断电流后。
6、电磁铁的两极是可以的。改变了或改变了,它的两极都会。
7、是秋季星空的一个耀眼星座。冬季上半夜,在南天最引人注目的是。
8、气温、水、植物等对岩石的破坏叫做,而卵石的形成既和风化作用有关又和水的有关系。
二、选择:(请将正确答案的序号填写在题中的括号内,每空2分,共12分)
1、当支点到力点的距离大于支点到力点的距离时,杠杆是()当支点到力点的距离小于支点到力点的距离时,杠杆是()当支点到力点的距离等于支点到力点的距离时,杠杆是()。
A、费力B、省力C、既不省力也不费力
2、生物体是由()构成的。
A、细胞B、神经系统C、脊髓
3、()是避免水土流失、保持水土的根本办法。
A、大量砍伐森林B、植树造林、绿化荒山C、保护野生动物
4、地球从表面到地心可分三个圈层,中间的圈层叫()。
A、地核B、地壳C、地幔
三、判断:(正确的打“√”,错的打“×”,每小题2分,共14分)
1、自然资源是取之不尽,用之不竭的,不必保护。()
2、神经系统是人体的司令部,主管人体的一切活动。()
3、动滑轮的作用是改变力的方向。()
4、火山喷发是由于地壳深处的岩浆受到巨大的压力冲出地面而形成
5、螺丝钉的螺纹越密,拧起来就越费力。()
6、唐山地震是在1976年7月28日,属于强烈地震。()
7、“高粱→田鼠→兔子”是一条食物链。()
四、把下面物品和应用的原理用线连起来。(共7分)
汽车方向盘斜面
斧子
螺丝钉省力杠杆
起钉锤
吊车费力杠杆
盘山公路
镊子轮轴
板子
五、通过学习你能举例说明:为什么有的工具设计成费力杠杆吗?(15分)
六、观察与实验(20分)
要证明斜面有省力的作用,你会怎样设计实验呢?请你在下面的横线上写出实验过程。
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