2014-2015学年北师大版选修八 Unit 22 Environmental Protection Lesson 3 Natural Disasters课件（50张）.ppt

1、Unit 22 Environmental Protection,Lesson 3 Natural Disasters,Look at the following pictures and what are happening in the pictures?,earthquake,tsunami,flood,drought,volcanic eruptions,hurricane,forest fire,typhoon,landslide,Review the words,droughts 旱灾 earthquake 地震 floods 洪水, 水灾 forest fires 森林火灾 hu

2、rricanes 飓风 landslides 滑坡, 山崩 tsunamis 海啸 typhoons 台风 volcanic eruptions 火山爆发,Which of the disasters do you think are:caused by people?made worse by people?natural?,Discussion,Read the article and check your answer to the questions: What cause the disasters?,Reading Strategies: Completing texts with

3、 sentence gaps,Read the text to get the general idea. Read a paragraph with a sentence gap and identify the topic, e.g. disasters.,Read the sentences before and after the gap and look for clues about the missing sentence, e.g. is it an example of what is mentioned before? Certain words may help you:

4、 time references (then), pronoun references (it, that), linking words (however).,Decide which sentence goes in the gap. Check that it fits the sentences before and after it.,Use the Strategies to complete the gaps in the text (1-5) with these sentences (a-g). There are two extra sentences you do not

5、 need.,a) But evidence shows that 73,000 years ago there was a much greater eruption.,b) Even Europe has suffered and large areas have been underwater. c) That is probably not the most important factor either. d) Third, the other bits of land you might have been able to farm are now useless. e) On t

6、op of that add global warming.,The answers: 1. b 2. f 3. g 4. e 5. a,f) For example, the Yellow River, once famous for flooding, failed to reach the sea at all for 226 days in 1997. g) One answer is overpopulation.,Read the text again and answer these questions.,1. What is the attitude of the journa

7、list towards the future? Pessimistic/negative 2. Who are most likely to be the victims of natural disasters? Poor people.,3. Why are there now more hurricanes, floods and droughts? Overpopulation and mismanagement of the worlds resources.,4. Why are volcanoes and earthquakes more dangerous now? Beca

8、use around half the worlds population lives in cities, more than 500 million people now live within the range of a volcanic eruption and an even greater number of people live at risk from earthquakes.,5. What could be the biggest threat to the planet in the future? A volcanic eruption. 6. What effec

9、ts might this threat have? It might send the planet intowinter for years.,Fill in the blanks about the text.,In the last _ years, there are more and more disasters such as _, _, thunderstorms, earthquakes, _, volcanic _ and _ fires all over the world. Why are so many disasters? One of the reasons is

10、 over- _.,ten,floods,tsunamis,typhoons,eruptions,forest,population,_ addition, _ change and global _ caused by the mismanagement of the worlds resources can lead _ the disasters or make them worse. At present, volcanoes and earthquakes are more _ with the fast _ of people.,In,climate,warming,to,dang

11、erous,growth,Earthquakes take the lives of 1.6 million people in the last hundred years. What is worse, the disaster professionals predict that the things will get _.,worse,Decide if the underlined words in the sentences below are nouns or verbs. Then write down their Chinese meanings.,1. a) She put

12、 her arms around me to comfort me.b) The soldiers were armed with guns.,noun 手臂,verb 武装,2. a) Heavy rains resulted in floods.b) His results were not as good as he had hoped. 3. a) He means well but just gets it wrong sometimes.b) The telephone is a means of communication.,verb 导致,noun 成绩,verb 意思是，怀(

13、好意),noun 方法,4. a) The children had fun sliding down the slide all afternoon.b) Penguins slide downhill over ice on their bellies. 5. a) Be careful! Dont slip on the wet floor.b) Write your number on this slip of paper.,noun 滑梯,verb 滑行,verb 滑倒,noun 小纸条,6. a) What would you like on your bread roll for

14、 lunch?b) He rolled the ball across the floor to me.,noun 卷,verb 滚动,Complete the sentences with the correct forms of the words above.,1. The _ forces protected the city. 2. When will you get your exam _? 3. Don broke his arm when he _ and fell on the ice. 4. I _ what I said. 5. What would be the bes

15、t _ of advertising our product?,armed,results,slipped,mean,means,6. Would you like honey on your _? 7. The house _ down the mountain side in the flood last year. 8. The match _ in a draw. They had 2 points each.,roll,resulted,slid,1. A number of nations have already been in armed conflict over water

16、, and reduced rainfall in the west of the US has resulted in huge forest fires. 寓词于境 阅读下列句子，注意arm的词性及意思。 1. I saw him walking with a girl on his arm.,Language points,2. He unbuttoned his overcoat and sat on the arm of the chair. 3. His forces are equipped mostly with American arms. 4. He said both s

17、ides are arming themselves. 5. War is certain; we should arm without delay.,自我归纳 arm作名词时，意为“手臂”，如句1；“扶手”，如句2；“_”，均用复数形式，如句3。 arm作动词时，既可作及物动词，也可作不及物动词，意为“武装”，如句4和句5。,武器,即学即练 猜猜下列句子中划线部分的意思。 1. The girls ran down the road arm in arm.2. The majority of their soldiers simply laid down their arms. 3. The

18、 people were quick to take up arms to defend their freedom.,手挽手地,放下武器，投降,拿起武器，准备战斗,语境展示 阅读下列句子，注意result in的意思及用法。 1. The accident that happened in front of our school yesterday resulted in ten deaths. 2. If left untreated, the condition will eventually result in blindness.,自我归纳 result in 意为“导致，造成”，后

19、接导致某事的_，句子的主语是_。 拓展 result from 表示“由造成，因而产生”，后接导致某事的原因，句子的主语是结果。如： The terrible accident resulted from his careless driving.,结果,原因,即学即练 根据括号内的汉语提示完成下列句子。 1. His being late for the performance _ (导致了全盘失败). 2. His heart disease _ (是由食用过多的高脂肪食物造成的).,resulted in a complete failure,resulted from eating t

20、oo much fat-rich food,3. The experiment _ (导致新发现) a cure for cancer.,resulted in a new discovery of,2. In the last three years, Indonesia has had a rough time, suffering several killer quakes and .,寓词于境 阅读下列句子，给出rough的意思。 1. Could you give me a rough idea what time youll be at home?,粗略的，大概的,rough ad

21、j. 艰难的,2. The first year was rough, but things have gotten better. 3. The other boys were rough, always looking for a fight. 4. It was a rough mountain road, full of stones and huge holes.,艰苦的,粗暴的，粗野的,高低不平的，粗糙的,3. People in agricultural areas, without any means to earn their living, move to the citi

22、es, and then .,寓词于境 阅读下列句子，注意means的意思及用法。 1. Every possible means has been tried, but none of them worked. 2. All possible means are considered, but none can handle the problem.,3. Could I borrow that book for a few days, please? By all means. 4. The young man realized his dream by means of hard wor

23、k. 5. Whatever happens, by no means should we lie to our parents.,自我归纳 means n. 意为“_”,单复数形式相同。means作主语时，其谓语动词要按其所表达的意思来确定用单数还是复数，如句1和句2。means常构成以下搭配：by all means 没问题，当然可以（句3）；by means of 用，依靠（句4）；by no means _（句5）。,手段, 方法,绝不，一点也不,即学即练 从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。 1. In China, the car is becoming a

24、popular _ of transportation. A. route B. means C. object D. entrance,B,2. Can you give me some advice where I should go for my holiday? _. We can talk about it over lunch. A. By no means B. Never mind C. By all means D. By the way,C,Work in pairs. Discuss these questions. 1. What natural disaster had happened in your memory? 2. What were the results of the disaster?,Speaking,3. What do you think governments can do to help prevent natural disasters? 4. What can we do to improve the environment and help victims of natural disasters?,Thank you!,