小学《科学》六年级上册实验手册.doc

小学《科学》六年级上册实验手册
of rural drinking water sources, protection of drinking water sources in rural areas by the end、罐头、啤酒瓶。（自备） 　　
l 操作方法：　　
（1）用撬盖的铁片去撬罐头、用开瓶器开啤酒瓶、用夹子夹东西；　　
（2）在课本P7图上分析三点位置及用力情况。　　
2、小杆秤的观察与制作（让学生自己做）　　
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
l 实验材料：1支长竹筷（秤杆）、螺丝帽或钩码（秤砣）、粗棉线或钓鱼线、小塑料圆盘（秤盘）、砝码（50克）、剪刀。（自备） 　　
l 操作方法：　　
（1）如课本P9图片,把一 支竹筷打磨光滑，其中一个螺丝帽或钩码用钓鱼线系好做秤砣；　　
（2）自制一个秤盘，系好三条一样长的细绳并固定在秤杆上；　　
（3）在秤砣与秤盘间选择适当的位置系上一个绳套，作为初次实验的平衡点；　　
（4）利用平衡原理制作托盘小杆秤刻度，在称盘内每次加一个砝码（50克），移动秤砣使秤平衡，并在秤杆的挂秤砣的位置做好标记，直到秤杆用完为止。 　　
　 　
第四课 轮轴的秘密　　
1、研究轮轴作用的实验　　
l 实验材料：轮轴1个、销子1个、钩码24个、2段棉线、底板1块、长支架1个。（学具中有）（或机械实验盒）　　
l 操作方法：　　
（1）如学具中的图组装轮轴装置；　　
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
（2）把一定数据的钩码挂在轴上，看成要克服的阻力；在轮上也挂上钩码，看成是我们用力的大小，直至平衡，反复做4种，并记录实验数据到课本P10表中。　　
（3）交流分析