of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of tral 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
教 师 活 动
学 生 活 动
应对预案
二、课前收集 自主整理
师：学生以小组为单位来谈谈调查的水资源的现状
三、小组合作 讨论交流
1、师：淡水是人类必不可少、不可替代的自然资源。目前，全世界包括中国在内有一百多个国家缺水。水是不可替代的自然资源和战略性资源，是人类生存和开展的根本条件。
2、师：出示地球上水的分布图
3、讨论水资源缺乏的原因
4、师：出示水资源缺乏的图片〔辅以文字表达〕
小结：一方面是由于全世界人口的快速增长，人类社会生产规模的扩大，导致水资源的消耗量与日俱增，另一方面是由于环境污染，水资源遭到破坏。
汇报展示
让学生涂色〔课本41页最后一段的百分数〕
在小组内交流讨论并汇报
教师整理
让学生通过这些百分数加深对水资源的缺乏
教师及时进行表扬鼓励
可以让学生先试着总结后教师再来总结
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 w
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