Unit 2 Topic 2 Section C课件仁爱版英语九年级上册.pptx

《Unit 2 Topic 2 Section C课件仁爱版英语九年级上册.pptx》由会员分享，可在线阅读，更多相关《Unit 2 Topic 2 Section C课件仁爱版英语九年级上册.pptx（25页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、Unit 2 Saving the Earth Topic 2 All these problems are very seriousSection CLanguage goalsBy the end of the class,you will be able to1.Master the following words,phrases and sentences:Words：hole,form,rise Phrases:take away,refer to Sentences：All these problems are very serious,so we must do somethin

2、g now.2.Understand the Ozone layer(1)_ of us knows how to stop the bad behavior.(2)I knocked on the door but _ answered.(3)Some of these books are better than_.(4)She was driving the car with one hand and wiping the window with the _.(5)They are beautiful but I am looking for _ useful.(6)Is there _

3、you can do to help her?(7)Therere 5 000 people living here and almost _has his/her own car.(8)Hes cleverer than _ I know.(9)Ive looked _ but I cant find it.Fill in the blanks using something,anything,others,nobody,everyone,anybody,everywhere,none,other.Nonenobodyothersothersomethinganythingeveryonea

4、nybodyeverywhereRevisionWhat can we do to protect our environment?Give a speechIn our daily life,we should face more environmental problems.Can you say something about them?cities,pollute,health problems factories,the land and the air,deadIn our daily life,we should face more environmental problems.

5、Can you say something about them?cut down,millions of,take away the earth,become desertWatch the video and discuss what you have learnt from it.Watch the video and discuss what you have learnt from it.1.Is ozone layer important or unimportant?Its very important.2.Can the ozone layer protect us?Yes.3

6、.What happened to it now?There is a big hole in the ozone layer.4.Whats the effect of it?Its harmful to all the living things,especially to humans for it does harmto our eyes and skin.臭氧层Ozone is a special kind of oxygen.It can protect the earth.氧气氧气In our daily life,we should face more environmenta

7、l problems.Can you say something about them?oxygen a special kind of oxygen called“ozone”(O3)a very big hole in the ozone layer,too much harmful radiation from the sun放射，放射物In our daily life,we should face more environmental problems.Can you say something about them?CO2 carbon dioxide increase a lot

8、,form a“blanket”,the heat from the sun cant escape.二氧化碳渗出；逃跑；逃脱毛毯，毯子 cause the level of the sea to rise called“the greenhouse effect”or“global warming”温室效应温室效应global warmingfewer treesfactory pollutiontraffic pollutionthe ozone layermore carbon dioxideCan you match them?1a Read and understand.Look a

9、t the following pictures and predict the main idea of the passage.Choose suitable titles for Paragraphs 2-6.Then write it down in front of each paragraph.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

10、 in many ways.Some things weve done are very good for the earth while some are bad._ All over the world,people have cut down 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 TreesA.Tr

11、affic pollution B.Factory pollution C.Fewer trees D.The ozone hole E.More carbon dioxide _ In big cities,cars and buses have polluted the air.Now many people in cities have health problems._Factories have also polluted the land and the water.As a result,many rivers and lakes are now dead._ Around th

12、e earth,theres 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 th

13、is kind of radiation can cause cancer.Traffic PollutionFactory Pollution The Ozone Layer直接地直接地 _ 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.

14、This is called“the greenhouse effect”.It causes the level of the oceans to rise and the climate of the earth to change.All these problems are very serious,so we must do something now.More Carbon Dioxide1b Read 1a and complete the following tasks.2.What does our planet mean here?A.The sun.B.Mars.C.Th

15、e moon.D.The earth.3.In the passage,blanket 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 worldDA1b Read 1a and complete the following tasks.4.The word it in Paragraph5 refers to _.A.CO2 B.O3 C.O2 D.H2O5.What is the

16、 best title for this passage?A.Environment Problems B.Pollution on the Earth C.Hope for the Future D.The Greenhouse Effect BA1c Complete the notes according to 1a.ProblemEffect on the environmentfewer trees forests become deserts,animals and plants disappeartraffic pollution greenhouse effect,level

17、of oceans rising,climate changecars and buses pollute air,health problemspollute land and water,rivers and lakes deadharmful radiation reaches the earth,cause cancer factory pollution ozone hole more CO22 Surf the Internet to collect more information about environmental problems and effects.Then dis

18、cuss the information in groups and take notes.3.Combine the key points in 1c and 2 to form a short passage and pay attention to the proper linking words.As we all know,water pollution is becoming more and more serious.Some factories pour waste water into the rivers.As a result,it makes the water dir

19、ty and smell terrible.Most of fish in the water have died and we cant swim in the water.Water is very important to human beings,so we should do our best to protect and save it.Luckily,our government is taking measures to protect the water from pollution.You can write it like this:Homework1.Memorize the useful expressions and key words which we learn today.2.Preview Unit 2 Topic 2-Section D.Bye-bye!Bye-bye!