1、Unit 2 Saving the EarthUnit 2 Saving the EarthTopic 2 All these problems are very Topic 2 All these problems are very seriousserious.Section DSection D 仁爱版英语仁爱版英语 九年级上九年级上 What can you learn form the short movie?Water is important.Water is important.Because humans,animals and plants cant Because hum
2、ans,animals and plants cant live without water.live without water.MovieMovieNearlyNearly three fourths of the earth is covered with water.water on the earth3/4被被覆盖覆盖/nl/几乎、将近几乎、将近 While there is so much water around the world,While there is so much water around the world,we humans we humans areare s
3、till still short ofshort of drinking waterdrinking water.So do animals and plants.So do animals and plants.Do you know why?Do you know why?be short of 缺乏缺乏1.Why is our earth 1.Why is our earth thirstythirsty when of the earth is when of the earth is covered with water?covered with water?Because abou
4、t 97%of the water on the earth is sea Because about 97%of the water on the earth is sea water and we cant use it for watering plants or water and we cant use it for watering plants or drinking directly.drinking directly.2.What kind of water can humans drink and use?2.What kind of water can humans dr
5、ink and use?Humans can only drink and use fresh water from Humans can only drink and use fresh water from places including rivers,lakes and places including rivers,lakes and()Although the world is hungry,it is even()Although the world is hungry,it is even thirstierthirstier.While.While nearlynearly
6、of the earth is covered with water,we are still short of drinking of the earth is covered with water,we are still short of drinking water.This is because about 97%of the water on the earth is sea water.This is because about 97%of the water on the earth is sea water.So we cant use it for watering pla
7、nts or drinking directly.water.So we cant use it for watering plants or drinking directly.Humans can only drink and use Humans can only drink and use fresh waterfresh water from places including from places including rivers,lakes and underground.rivers,lakes and underground.Read and answer.Read and
8、answer.How can we How can we avoidavoid a serious water shortage?a serious water shortage?,we should save water and not waste it.,we should save water and not waste it.,we should protect our water resources and,we should protect our water resources and not pollute them.not pollute them.,we should di
9、scover ways to reuse water.,we should discover ways to reuse water.()How can we avoid a serious water shortage?First,we should save water and not waste it.Second,we should protect our water resources and not pollute them.Third,we should discover ways to reuse water.Scientists have made some progress
10、 in this field.Today,some large cities are reusing their water.But peoples need for water is increasing day by day.We still dont have enough water.What else can we do?Read Paragraph2 and mark T or F.Read Paragraph2 and mark T or F.()Scientists havent made any progress()Scientists havent made any pro
11、gress in this in this field.field.()Water is()Water is reusereused nowhere.d nowhere.()Peoples need for water is increasing()Peoples need for water is increasing day by day by day.day.F FF FT TListen to Paragraph3 and fill in the blanks()The sea_ _ have the best answer.There is()The sea_ _ have the
12、best answer.There is _ _water in the sea.But we need to _the salt _ _water in the sea.But we need to _the salt _from the sea water _from the sea water.This is very expensive.If This is very expensive.If scientists can find cheaper ways to do it,we can scientists can find cheaper ways to do it,we can
13、 _ _ _of the _ _ _of the shortageshortage of water.of water.seems toseems toplenty ofplenty oftaketakeawayawaysolvesolve the problemthe problem Q:How can we change sea water into fresh water?Q:How can we change sea water into fresh water?We need to take the salt away from the sea We need to take the
14、 salt away from the sea water.water.Enjoy ReadingEnjoy Readingbe short ofbe short ofon the earthon the earthuse sth for sth/doing sthuse sth for sth/doing sthavoid sthavoid sthmake(some)progressmake(some)progressin the fieldin the fieldday by dayday by dayseem to do sthseem to do sthplenty of plenty
15、 of take away take away the shortage of the shortage of1.缺乏缺乏2.在地球上在地球上3.用某物做某事用某物做某事4.避免某事避免某事 5.取得（一些）进步取得（一些）进步6.在这个领域在这个领域7.一天天一天天8.似乎似乎/好像做某事好像做某事9.大量的大量的10.带走、拿走带走、拿走11.的缺乏的缺乏1.2.3.4.5.6.7.8.9.10.11.one by one one by one year by yearyear by yearstep by stepstep by step一个接一个一个接一个一年年一年年一步步一步步 If
16、 we want to use the sea water,we must _ _(拿拿走）走）the salt from the sea water.How can we _(避免避免)a serious water shortage?We should _(找到找到)ways to reuse water.Peoples need for water is increasing _(一一天天天天).Although the world is hungry,it is even _(更渴的更渴的)While _(几乎，差不多几乎，差不多)of the earth is covered wit
17、h water,we are still short of drinking water.take awaytake awayavoidavoiddiscoverdiscoverday by dayday by daythirstier thirstier nearlynearlyWater pollutionWater pollutionless fresh waterless fresh water We should protect and save water.How to protect and save water?How to protect and save water?Exa
18、mple:Pass laws(n.法律法律)against water pollution.Collect and reuse waste water.5.6._Turn off the taps in timeTurn off the taps in timeTake a shower instead of a bathTake a shower instead of a bathstopfrom,pourinto,turn off,tap(水龙头),wash clothes/vegetables,clean the floor,throwintoStop the factories fro
19、m pouring waste water into rivers.Stop the factories from pouring waste water into rivers.Dont throw litter into the waterDont throw litter into the waterAfter we wash clothes or vegetables,we can reuseAfter we wash clothes or vegetables,we can reuse the water to clean the floor.the water to clean t
20、he floor.We learnWe learn:1.some words:1.some words:avoid,discover,thirsty,avoid,discover,thirsty,nearly,law nearly,law 2.some phrases:2.some phrases:day by day,be short of day by day,be short of 3.some sentences:3.some sentences:(1)But peoples need for water is (1)But peoples need for water is incr
21、easing day by day.increasing day by day.(2)While nearly of the earth is covered(2)While nearly of the earth is covered with water,we are still short of drinking with water,we are still short of drinking water.water.We can:We can:1.Talk about ways of saving water.1.Talk about ways of saving water.2.S
22、ummarize and use the indefinite 2.Summarize and use the indefinite pronoun and adverb correctly.pronoun and adverb correctly.3.Write a proposal.3.Write a proposal.SummarySummary3.Write a proposal(提议提议)about saving water to all the students in your school.My dear friends,My dear friends,Water is very
23、 important to human beings.Lets do Water is very important to human beings.Lets do something to protect and save it.something to protect and save it.First,_.First,_.Second,_.Second,_.Third,_.Third,_.Lets try our best to save water and our planet.Lets try our best to save water and our planet._ _ _HomeworkHomework
