高中英语选修八+Unit22+Lesson1+Global+Warming+课件.ppt

1、Unit 22 Environmental Protection Warm up and Lesson 1In this lesson, well be able to 1. understand some new words. 2. understand the text and get the key information. 3. talk about activities to protect the environment with the expressions learned in the text Environmental problems?air pollutionglob

2、al warmingendangered animalswater pollutionSoil pollutionsandstormforestration noise pollutiondesertificationFind out the causes of environmental problems Global warming the greenhouse effect endangered animals natural disasters flooding war overfishing forestration space exploration overhunting pov

3、ertyUse the words above to finish off Ex.1,p51.Earthquakes and volcanic eruptions are examples of natural disasters .2.The giant panda and the Bengal tiger are endangered species .3.Because of the greenhouse effect , the earth is warmed by gases trapped in the atmosphere.4. Global warming is an incr

4、ease over time of the average temperature of the Earth.5. Overfishing is harmful to the ecology of the sea.6.Thousands of people in Africa continue to die because of war and poverty .7.The water level rose so high in several places that many homes are at risk from flooding .Unit 22 Environmental Pro

5、tection unit 1 Global warming Whats wrong?The earth is sweating !-Global warminga.Acid rain b.Greenhouse effect Lead-inPre-readingPredict : (group work) What is the text about? Based on the title “Can we take the heat”and the following pictures. Traffic Jam FactoryThe text may be about: 1.Vehicles a

6、nd factories pump varieties of gases in huge quantities, especially carbon dioxide,into the atmosphere,which causes the greenhouse effect and will cause some other disasters. 2. How do we take actions to wrestle with this problem and stop the disasters from happening?While-readingWhat is global warm

7、ing?Global warming means an average increase in the Earths temperature which leads to climate change.SkimmingRead the text and match the heads with the paragraphs.1.Draw readers attention to the topic by asking questions. 2.What should human beings do. 3.What is global warming. 4.Consequences of glo

8、bal warming. 5. What cause global warmingPara 1.Para 2.Para 3.Para 4.Para 5.Word study Scan the text for these following words and work out their meanings. consensus, bounce, agriculture, coincidence, condemn, reservation, sarifice, advocateScanning 1. In the last few decades, scientists have reache

9、d consensus and reported that human beings are causing changes in the earths climate 2. Without these naturally occuring gases, the suns rays would bounce back into space leaving the Earth cold and impossilbe to live on.agreementjump back 3. Given this data, it seems that the link between human acti

10、vities and rising global temperatures is not merely a coincidence. 4. if we continue to produce carbon dioxide and other gases in such huge quantities, we are condemning life on Earth巧合巧合destroying 5. Some government, for example, the USAs federal government, express reservations about whether globa

11、l warming is really caused by human activities. 6.Experts advocated that each person play their part to save the earth.保留意见保留意见put forward and supportMatch the Key Words with their Chinese meanings. consensus bounce agriculture coincidence condemn reservation sacrifice advocate反弹反弹 农业农业 巧合巧合一致的意见一致的

12、意见保留保留 宣判死刑宣判死刑主张，提倡主张，提倡 牺牲牺牲Careful reading(1)Para.1Introduction: Human beings are causing_ and it is believed that _ could be one of the biggest_ in the 21st centry.Para.2Definition: Gloable warming refers to_ in the Earths temperrature that, in turn,_ climate change.Para.3Causes:Many experts ins

13、ist that the blame for this global warming can mostly_. Para.4Consequences: If we continue to produce greenhouse gases_. There will be more_ such as floodings, heat waves and droughts.Para.5Action: All governments have a responsibility to _ and each person should_.Para.1 Introduction: Human beings a

14、re causing_ and it is believed that _ could be one of the biggest_ in the 21st centry.Para.2 Definition: Gloable warming refers to_ in the Earths temperrature that, in turn,_ climate change.changes in the Earths climateglobal warmingenvironmental problemsan average increaselead toPara.3Causes:Many e

15、xperts insist that the blame for this global warming can mostly_. Para.4Consequences: If we continue to produce greenhouse gases_. There will be more_ such as floodings, heat waves and droughts.Para.5Action: All governments have a responsibility to _ and each person should_.be pinned on human activi

16、tiesin such huge quantitiesdisastersreduce the amount of carbon dioxideplay their part Read the text and answer the following questions. 1. What is controlling the temperature of the Earth? 2. Are greenhouse gases necessary for life on Earth? 3. What human activities are causing global warming? 4. B

17、y how much has the global average temperature increased in the last 100 years? 5. How can we help solve the problem of global warming?Careful reading(2)Fill in the blanks about the text.Global warming means an average increase in the Earths temperature which causes climate change in turn. Scientists

18、 think it is _ _ that cause global warming, especially gases from _ and vehicles which speed up global warming.factorieshuman beingsThey also think global warming is one of the biggest environmental problems in the 21st century. The Earths temperature is controlled by _ _like carbon dioxide which _

19、heat from the sun in the Earths atmosphere. Many experts believe global warming is mainly causedgreenhouse gases trapby human _. Over the last 100 years , the global average temperature has increased _ and if human beings continue to pump _ gases into the Earths atmosphere, the global warming will c

20、ause dramatic climate changes like more frequent floods, _ and by 1F greenhouseheat waves activitiesDroughts. There are some serious diseases. Sea level will be _ , floating coastal area , negatively affecting _ and forestry. So governments all over the world should reduce the _of greenhouse gases.

21、We individuals should pay _ to what we are doing, even raisedfishingreleaseattentionsmall changes like _ public transport, _, using low-flow _, buying energy-efficient _ using recycled paper or _ lights can have _ on the future of the Earth .taking recyclingshower heads light bulbsswitching off grea

22、t effect Post readingVoice your opinions: Taking action on global warming (or climate change) is similar. In some cases, it only takes a little change in lifestyle and behavior to make some big changes in greenhouse gases reductions. For other types of actions, the changes are more significant. When

23、 that action is multiplied by the 1.3 billion people in China. Or the 6 billion people worldwide, the savings are significant.What difference can we make?Group workExamples The recycling symbolbuy the recycled productsLanguage pointsHere are some key phrases from thetext:1.beyond our control2. pump

24、into3. speed up4. refer to5. trapinto6. bounce back7. as a result of8. lead to9.be relevant to10.in such huge quantities11. have a responsibility to12. in turn13. as individuals14. switch off15. take action out of our controlpipe intoacceleratemeansput in the trapsend backbecause ofcausebe related t

25、owithin large amountbe responsible forone after the otherindividuallyturn offtake measuresvocabularyUse the expressions in the box in the correct form to complete the sentences. beyond our control, pump into, as a result of, in large quantities, refer to, speed up1 Water was the fish pond from the river.2 We all need to to finish in time!3 There is nothing more we can do .the situation is now .4 the accident, she is now afraid of water.5 The scientist global warming at least three times in his speech.6 The factory was producing greenhouse gases _ .Homework Ex1, 3 on P54