仁爱九年级上册Unit2topic2SectionC课件.pptx

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1、What kinds of pollution do you know?,Air pollution, water pollution, noise pollution, soil pollution and so on,look and say,1,What kinds of pollution do you,In big cities, cars and buses have polluted the air. It makes people have health _. ,problems,prblmz,2,In big cities, cars and buses,The rivers

2、 and lakes are_because the factories have polluted the water.,dead,ded,3,The rivers and lakes are_,People have cut down millions of trees. The rain takes away the earth. So forests have become _.,deserts,dezts,4,People have cut down millions,The ozone layer can protect the earth from harmful _.,radi

3、ation,臭氧层,redien,辐射,5,The ozone layer can protect th,Carbon dioxide(CO2 ) formed a _ around the earth and the heat cant escape.,blanket,blkt,二氧化碳,6,Carbon dioxide(CO2 ) formed a,The greenhouse effect causes the level of the sea to _ and the climate of the earth to change.,rise,温室效应,the level of the

4、sea,raz,7,The greenhouse effect causes t,fewer trees,factory pollution,traffic pollution,the ozone layer,more carbon dioxide,Can you match them?,8,fewer treesfactory pollutiont,Task1:Fast reading,Choose suitable titles for Paragraphs 2-6.Then write it down in front of each paragraph.（P40 1b 1）,Traff

5、ic pollution Factory pollution Fewer trees The ozone hole E. More carbon dioxide,Find the key words or the same words in the paragraph（文段）,9,Task1:Fast readingChoose suita,Choose suitable title for each paragraph. Then write it down in front of each paragraph.,_ All over the world, people have cut d

6、own millions of trees. When it rains or when the wind blows, the earth is taken away. Forests have become deserts, so many kinds of animals and plants are disappearing.,Fewer Trees,Traffic pollution B. Factory pollution C. Fewer trees D. The ozone hole E. More carbon dioxide,10,Choose suitable title

7、 for eac,_ In big cities, cars and buses have polluted the air. Now many people in cities have health problems.,Traffic Pollution,Traffic pollution B. Factory pollution C. Fewer trees D. The ozone hole E. More carbon dioxide,11,_ In big cities, c,_Factories have also polluted the land and the water.

8、 As a result, many rivers and lakes are now dead.,Factory Pollution,Traffic pollution B. Factory pollution C. Fewer trees D. The ozone hole E. More carbon dioxide,12,_Factories hav,_ Around the earth, theres a special kind of oxygen called “ozone”(O3). It is important to the earth. But now air pollu

9、tion is destroying it and making a very big hole in the ozone layer. Too much harmful radiation from the sun passes through the hole and reaches the earth directly. This is very dangerous because this kind of radiation can cause cancer.,The ozone hole,直接地,Traffic pollution B. Factory pollution C. Fe

10、wer trees D. The ozone hole E. More carbon dioxide,13,_ Around the earth,_ Carbon dioxide (CO2) in the air has increased a lot. It mainly comes from burning oil, coal and wood. This has formed a blanket around the earth. The heat from the sun cant escape so the temperature is rising. This is called

11、“the greenhouse effect”. It causes the level of the oceans to rise and the climate of the earth to change.,More Carbon Dioxide,Traffic pollution B. Factory pollution C. Fewer trees D. The ozone hole E. More carbon dioxide,14,_ Carbon d,Listen to 1a to know more about the text.,How many problems are

12、mentioned(提到)?,15,Listen to 1a to know more abo,Task2：Intensive reading,Read 1a carefully and choose the answers. (P40 1b 2-5),Find the key words and pay attention to the topic sentence.,16,Task2：Intensive readingRead 1a,2.What does our planet mean here? A. The sun. B. Mars. C. The moon. D. The eart

13、h.,The earth is 4.6 billion years old. We humans have lived on the earth for only 35 000 years, but during this period, we have changed our planet a lot in many ways. Some things we have done are very good for the earth while others are bad.,17,2.What does our planet mean he,3.In the passage, blanke

14、t refers to _. A. carbon dioxide around the earth B. the ozone layer in the sky C. the forests around the world D. pollution all over the world,_ Carbon dioxide (CO2) in the air has increased a lot. It mainly comes from burning oil, coal and wood. This has formed a blanket around the earth. The heat

15、 from the sun cant escape so the temperature is rising. This is called “the greenhouse effect”. It causes the level of the oceans to rise and the climate of the earth to change.,18,3.In the passage, blanket refe,4.The word it in Paragraph5 refers to _. A. CO2 B. O3 C. O2 D. H2O,_ Around the earth, t

16、heres a special kind of oxygen called “ozone”(O3). It is important to the earth. But now air pollution is destroying it and making a very big hole in the ozone layer. Too much harmful radiation from the sun passes through the hole and reaches the earth directly. This is very dangerous because this k

17、ind of radiation can cause cancer.,19,4.The word it in Paragraph5 re,5. What is the best title for this passage ? Environmental Problems B. Pollution on the Earth C. Hope for the Future D. The Greenhouse Effect,All these problems are very serious, so we must do something now.,Dont forget the conclus

18、ion！（结论）,20,5. What is the best title for,Write down only the key words when taking notes.,1c Complete the notes according to 1a.,21,Write down only the key words,_pollute air, _problems,pollute _, rivers and lakes_,_ reaches the earth,cause_,factory pollution,ozone hole,more CO2,cars and buses,heal

19、th,land and water,dead,harmful radiation,cancer,22,ProblemEffect on the environme,any questions?,23,any questions?23,2. Surf the Internet to collect more information about environmental problems and effects. Then discuss the information in groups and take notes.,3bine the key points in 1c and 2 to f

20、orm a short passage and pay attention to the proper linking words.,Task for out of class,24,2. Surf the Internet to collec,1.带走2.臭氧层3. 二氧化碳4.温室效应5.指的是6.海平面7.直接到达 地球,Summary,take away,the ozone layer,carbon dioxide,the greenhouse effect,refer to,the level of the oceans,reach the earth directly,25,1.带

21、走Summarytake awaythe ozone,1.Read 1a.2.Memorize the useful expressions and key words which we learn today.3.Finish Section C in your workbook.4.Review Section A-C and preview Section D.,Assignment,26,1.Read 1a.Assignment26,fun reading,1.what does Earth Hour mean in Chinese?A.世界时间 B.地球1小时 C.当地1小时 D.土

22、地1小时2.What does 60 in the picture refer to? A.60 hours B.60 minutes C.60 seconds D.60 days3.When was the event first started? A. in 2007 B.in2016 C. in 2017 D. in 2018,27,fun reading1.what does Earth H,take away 拿走，取走我不喜欢这些书，请把它们拿走I dont like these books. Please take them away.,2.when the wind blows

23、, the earth is taken away.,代词放中间,风吹的时候，把泥土带走了。,28,take away 拿走，取走2.when the win,refers to 谈及，说起；指的是我们的 星球指的是地球。,Our planet refers to the Earth.,4.In the passage, blanket refers to _.在文段里，blanket指的是,29,refers to 谈及，说起；指的是Our planet,while conj. 而, 然而, 相当于but, 表示对比他是老师而我是司机。He is a teacher, while I am

24、a driver.,1.Some things we have done are very good for the earth while others are bad.,30,while conj. 而, 然而, 相当于but, 表示,It causes the level of the oceans to rise and它能让海洋的水平面上升,rise 是不及物动词，意为：升起；上升,The sun rises in the east.,太阳从东方升起,raise 是及物动词，意为举起；抬起，提高,请举手,Please raise your hands.,sth risesraise sth.,31,It causes the level of the oc,