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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Unit,2,Sav,ing,the,Earth,Topic2 All these problems are very serious.,Section B,Sanmenxia,No.2 Middle School Zhang,Xueli,Teaching aims and demands:,1.Talk about the importance of forests and water resources.(,谈论森林和水资源的重要性,),2.Enhance students awareness of environmental protection.(,培养学生的环保意识,),sandstorm,cause breathing problems have to wear masks,serious,sandstorms,How do sandstorms come into being?,Number the pictures,.,(),(),(),(),(),(),4,1,5,3,6,2,wash the earth away,many trees,change into desert,forests gone,sandstorms,come into being,cut down trees,Look and describe it using the words given.,many trees,Look and describe it using the words given.,cut down trees,Look and describe it using the words given,.,forests,gone,only leaving the earth,Look and describe it using the words given,.,wash the earth away,Look and describe it using the words given.,change into desert,Look and describe it using the words given.,sandstorms come into being,Describe the sandstorm in a short paragraph,.,(),(),(),(),(),(),4,1,5,3,6,2,Cutting down too many trees can cause sandstorms.,Listen to 1a,answer the question.,How can these trees affect the weather?,Trees can stop the wind from blowing the earth away.,Read 1a,answer the question.,What are trees functions?,Trees can stop the wind from blowing the earth away.,A lot of water can be saved by forests.,Trees can also prevent the water from washing the earth away,.,A.,B.,C.,Read 1a carefully,underline the new words and important sentences.,preventfrom,prevent sb.from doing,sth,.,although,虽然,尽管,不能和,but,连用,.,human being,human beings,Can you show yourself?,Have a try!,Listen,repeat and act out 1a.,退出,What can trees do for us?,What can trees do for us?,Without trees,what will our world be like?,sandstorms,be short of drinking water,desert,flood,drought,drought,flood,What should we do?,We should,plant more trees.,protect forests.,prevent,/,stop,people,from,cutting,down trees.,/,distroying,forests.,What will our world be like without water?,Trees and forests are very important to us.,Water is important,too.,No life,no plants,nothing.,What can trees do for us?,stopfrom,fresh air,rich land,a lot of water,beautiful scenery,退出,退出,退出,Protecting and Saving Water,Water is very important to human beings,but not everybody knows how to protect and save it.Here are some ways:,1.Pass laws against water pollution.,2.Stop factories pouring waste water into rivers.,3.Remember to turn the tap off when you leave.,4.Collect and reuse waste water.,.,Discuss in groups.What other ways do you have?,根据句意及首字母提示完成句子。,Trees are very useful to us.They can help us p_ the wind from blowing the earth away and stop the,s_from,moving towards the rich land.Trees also,s_water,from running away.They can keep a great d_ of water.So we must stop people from c_ down too,many trees.Otherwise a lot of rich land will,change into d_,l_ only sand.We must get rid of(,摆脱,)this kind of bad b_.,revent,utting,esert,eaving,ehavior,eal,ave,and,中考连接,()1.Parents should prevent the children _ taking medicine by themselves.,A.about B.with C.from D.of,()2._we were quite tired,_we still went on working.,A.Although,/B.Because,/C.Because,so D.Although,but,()3.The farmer _a lot of trees and built a new house,A.cut down B.cut off C.turned down D.turned off,(,)4.My hometown has changed _a new one in the last three years.,A.in B.to C.with D.into,()5.Eating too much is _to your health.,A.useful B.helpful C.harmful,D.wonderful,C,A,A,D,C,Useful expressions,The wind is blowing strongly with lots of sand.,People have cut down too many trees.,A lot of rich land has changed into desert.,And a lot of water can be saved by forests.,They can also prevent the water from washing the earth away.,Stop factories from pouring waste water into rivers.,Sum up,What have you learned,from this lesson?,Forests and water are very important to us.,We should protect our environment.,Protecting our environment,is,protecting our home,.,As students,what should you do to protect our school?,As ,what should you do to protect our environment?,Forests and water are very important to us.,Protecting them is protecting our home.,Bye-bye!,（歌曲,2,）,
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