(三下)科学ppt课件-11电在我家中-｜冀教版

Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,*,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,家里都有哪些家用电器，,它们的作用都是什么？,家里都有哪些家用电器，,(三下)科学ppt课件-11电在我家中-冀教版,电池,电池,电源,电源,(三下)科学ppt课件-11电在我家中-冀教版,科学阅读,阅读要求：,1,、独立阅读图文资料，思考,“,电是怎样来到我家中的？,”,。,2,、小组讨论、交流并完成填空。,科学阅读阅读要求：,发电方式,1,2,3,考考你,发电方式 1 2 3考考你,风力发电,发电方式：,风力发电发电方式：,水力发电,发电方式：,水力发电发电方式：,太阳能发电,发电方式：,太阳能发电发电方式：,风力发电,水力发电,太阳能发电,风力发电水力发电太阳能发电,电的传输设施,1,2,考考你,3,电的传输设施 1 2考考你 3,变电站,设备名称：,变电站设备名称：,高压线塔,设备名称：,高压线塔设备名称：,电线杆,设备名称：,电线杆设备名称：,变电站,高压线塔,电线杆,变电站高压线塔电线杆,1,2,3,4,5,6,电如何一步步来到我们家？请给六幅图排序！,高压线塔,变电站,变电器,电线杆,家,水力发电厂,123456电如何一步步来到我们家？请给六幅图排序！高压线塔,电如何一步步来到我们家？请给六幅图排序！,3,高压线塔,2,变电站,4,变电器,5,电线杆,6,家,1,水力发电厂,电如何一步步来到我们家？请给六幅图排序！3高压线塔2变电站4,看一看，说一说，这些物品是否需要电？,1,6,5,4,3,2,看一看，说一说，这些物品是否需要电？165432,风力电动车,风力电动车,水力充电宝,水力充电宝,课下收集、整理节约用电的小妙招，分享给大家。,争做节电小达人,课下收集、整理节约用电的小妙招，分享给大家。,1.,根据目前的定义，转基因技术是从某种生物中提取所需要的基因，将其转入另一种生物中，使与另一种生物的基因进行重组，从而产生特定的具有优良遗传形状的物质。从研究角度看，转基因的技术推进已有不短的时间。,2.,对于人类而言，转基因技术或是天使，或是魔鬼，既可能给人类社会的发展带来福音，也可能对人类的健康造成损害。,3.,关键问题在于，科学界至今不能确认，转基因食品究竟有无可能对生态环境、人体健康造成重大伤害。在这样的背景下，转基因食品的商业化，特别是主粮的商业化问题显得有些敏感。,4.,在我们看来，转基因食品在当下中国所引发的争议，看起来相当复杂，但归结起来，不外是科学逻辑与商业逻辑共同作用下的结果。从科学角度看，这件事情很麻烦，是因为转基因食品的安全性在短期内得不到明确认证。,5.,鉴于转基因食品，特别是主粮的安全性研究需要一个漫长的周期，主管部门断不可急于宣布转基因主粮的安全性。,6.,由于不同转基因食品在人们食品消费中的比重大不相同，其可能的危害性自然也不会一致。但就原则而言，在没有明确的科学结论之前，任何对转基因食品在安全性之外其他方面的重大意义的欢呼，都不是一件明智之举。,7.,穿越浩瀚的银河，被月亮镶嵌的梦，具备了无限的属性。自然之子天真而崇高的想象力是对我们神五、神六的理想设计。当我们通过超越自身而实现人类对月的最好抵达。华夏人几千年的美好向往，终于与多少代人的热烈渴望有了一个完美的对称。,1.根据目前的定义，转基因技术是从某种生物中提取所需要的基因,