选修六Unit4 Global warming Period 1.docx

1、选修六Unit4 Global warming Period 1Unit 4Global warming本单元的中心话题是人类当今面临的环境问题，主要探讨了“全球变暖”和“节约能源”等方面的问题。由于人类过多使用不可再生能源，大气中二氧化碳的含量逐年增加，导致全球气温上升。通过学习本单元，让学生了解能源分为“不可再生能源”和“可再生能源”，帮助学生树立“节约能源、保护环境”的主人翁意识。本单元的主要教学内容如下表所示：类别课程标准要求掌握的内容话题Global warming，pollution and the importance of protecting the earth来源:学|科|

2、网来源:学科网来源:学_科_网Z_X_X_K来源:学科网ZXXK词汇tend来源:学|科|网v.趋向；易于；照顾catastrophen.大灾难；浩劫opposev.反对；反抗；与(某人)较量floodn.洪水；水灾statev.陈述；说明consequencen.结果；后果；影响glancev.看一下；扫视n一瞥existencen.生存；存在quantityn.量；数量commitmentn.承诺；交托；信奉rangen.种类；范围pollutionn.污染；弄脏tendencyn. 趋向；趋势growthn.增长；生长circumstancen.环境；情况motorn.发动机oppose

3、dadj.反对的，对立的cann.容器；罐头steadyadj. 平稳的；持续的microwaven.微波炉；微波widespreadadj.分布广的；普遍的educatorn.教育工作者；教育家averageadj.平均的contributionn.贡献consumev.消费；消耗；耗尽；吃完presentationn.显示；演出subscribev.同意；捐赠；订阅disagreementn.分歧；不一致advocatev.拥护；提倡；主张randomadj.胡乱的；任意的refreshv. 使恢复；使振作mildadj.温和的；温柔的；淡的graphn.图表；坐标图；曲线图outerad

4、j.外部的phenomenonn.现象electricaladj.电的；与电有关的fueln.燃料casualadj.随便的；偶然的datan.资料；数据nuclearadj.核的；核能的trendn.趋势；倾向perprep.每；每一come about 发生；造成keep on 继续subscribe to 同意；赞成；订购on the whole 大体上；基本上quantities of 大量的on behalf of 代表一方；作为的代言人go up 上升；增长；升起put up with 忍受；容忍result in 导致so long as 只要be opposed to 反对an

5、d so on 等等even if 即使greenhouse effect 温室效应句型1.it_is human activity that has caused this global warming.(emphatic “it”)2.it is a rapid increase when_compared_to other natural changes.(ellipsis)3.There is no doubt that_the_earth_is_becoming_warmer.(the appositive clause)4.Without the “greenhouse effec

6、t”，the earth would_be about thirtythree degrees Celsius cooler than it is.(the subjunctive mood)功能1.同意与不同意(Agreement and disagreement)Exactly.Youre right.I agree.Thats correct/true/right.Im afraid I disagree with you. Im afraid not. I dont think so.No way. I dont agree. I doubt.2责备与抱怨(Blame and comp

7、laint)Im sorry to bring this up，but.Im sorry to have to say this，but.They shouldnt have done it. They are to blame.Perhaps/Maybe they should/ought to. Why dont you do something about it？语法“it”的用法(the use of “it”)(2).it_is human activity that has caused this global warming.教学重点1.Get students to know

8、about global warming and its effect；to realize what we can do about global warming.2Have students learn some useful new words and expressions about global warming and let them learn effective ways to master them.3Enable students to grasp and use the expressions of agreement and disagreement，blame an

9、d complaint.4Let students learn the new grammar item：the use of “it”(2)5Develop students listening，speaking，reading and writing ability.教学难点1.Enable students to master the use of “it”(2)2Let students learn to write a short passage to tell others how to solve the problem of global warming.3Develop st

10、udents integrative skills.课时安排Periods needed：6Period 1Warming Up，Prereading，Reading and ComprehendingPeriod 2Language StudyPeriod 3Grammarthe Use of “It”(2)Period 4Listening and Speaking Period 5Reading and WritingPeriod 6Summing Up，Learning Tip and AssessmentPeriod 1Warming Up，Prereading，Reading an

11、d Comprehending教学内容分析This is the first teaching period of this unit.The central part of this period is the reading passage with the title of “The Earth Is Becoming WarmerBut Does It Matter？” talking about the global issue which has a great effect on human beings life.Warming Up gives six pictures to

12、 help students list the sources of energy they can think of in our daily life.Then they will be led to discuss which energy source is “renewable” and which is “nonrenewable”This part is designed to help the students to recall their background knowledge about energy and prepares students for the whol

13、e unit.Prereading provides a picture of a greenhouse and then tells us what a greenhouse is and what “greenhouse gases” are.The students will be led to discuss what they think greenhouse gases do，leading to the topic of the reading passage.Reading is a passage from an environmental magazine for youn

14、g people.It puts forward the possible effect of increased carbon dioxide in the atmosphere and different points of view about it.It also analyzes the causes of the earths increased temperature.It poses questions and encourages students to think about the issues.There are two graphs in it that tell u

15、s the “temperature difference from longterm average,18602000” and “carbon dioxide content in the atmosphere,19571997”Characters in the passageDr Janice Foster，George Hambley and Charles Keeling are all real persons and their views reflect the views of some scientists today.Comprehending consists of

16、three written or oral exercises for the students to do so as to help the students to get a better understanding of the text，that is to say，to help the teacher to check how much the students have understood the text.三维目标设计Knowledge and skills1To know the meanings of the following new words and phrase

17、s：consume(消费；消耗；耗尽)，come about(发生；造成)，random(胡乱的；任意的)，phenomenon(现象)，subscribe(同意；捐赠；订阅；签署文件)，subscribe to(同意；赞成；订购)，fuel(燃料)，quantity(量；数量)，quantities of (大量的)，tend(趋向；易于；照顾)，go up(上升；增长；升起)，per(每；每一)，data(资料；数据)，result in(导致)，trend(趋势；倾向)，catastrophe(大灾难；浩劫)，flood(洪水；洪灾)，oppose(反对；反抗)，opposed(反对的；

18、对立的)，be opposed to(反对)，consequence(结果；后果)，state(陈述；说明)，range(种类；范围)，even if(即使)，keep on(继续)，glance(看一下；扫视)，steady(平稳的；持续的)，steadily(平稳地，持续地)2To learn about some facts and views about global warming.3To learn how the information is organized.4To develop the students reading ability by skimming and sc

19、anning the passage.5To develop the students speaking ability by talking about global warming.Process and methods1While doing Warming Up the teacher can lead in the topic of this unit by showing students some pictures or videos about sources of energy，making the students recall their own knowledge ab

20、out energy.2During Prereading the teacher can go around the classroom and discuss the questions with several students.This discussion should be studentcentered and lead them to the topic of global warming.The teacher should also ask the students to look at the graphs in the reading passage and try t

21、o find out the general idea of the text.3While doing Reading and Comprehending，the teacher may first ask the students to read the text quickly to get the general idea of each paragraph.After reading the passage，students are encouraged to answer some questions and discuss the text structure.4To conso

22、lidate the contents of the reading passage，the students should be required to retell the text in their own words at the end of the class.Emotion，attitude and value1To make students realize the harm of global warming and the importance of environmental protection.2To develop students sense of coopera

23、tive learning.教学重、难点1To enable the students to learn about global warming and to develop their reading ability.2To enable the students to talk about what we should do to prevent global warming. 1Warming up1Warming up by reading and talking：Read through the exercise with the class.Put students in gro

24、ups of four to talk about what we use energy for，what are the sources of these energy and whether the sources are renewable or nonrenewable.Suggested answer：The six photos are：windmills；a coal power station；an oil refinery；a nuclear power plant；solar panels；a hydroelectric dam.2Warming up by discuss

25、ion：Draw a form on the blackboard as follows：Things that use energySources of energyRenewable/nonrenewable Let the students have a discussion and collect suggestions from students and write them under the appropriate heading.Suggested answer：Things that use energySources of energyRenewable/nonrenewa

26、ble lightsheating television cassette player video recorder computer fridge stove hairdryer .coalnonrenewableoil nonrenewablenatural gasnonrenewablewind power renewablesolar energy renewablenuclear energy nonrenewablehydroelectric power renewablebiomass energy renewablegeothermal energy renewabletid

27、al energyrenewable 2Prereading1Show a picture of a greenhouse to students and ask them what a greenhouse is made of and what its purpose is.Suggested answer：Its made of glass and plants can grow in it when its cold outside.Ask the students how it works.Suggested answer：The glass traps the heat from

28、the sun，making the air warm so that plants grow better.2Ask students what they think “greenhouse gases” are and what they think greenhouse gases do.Look at the picture above and explain it to their partners.Suggested answer：Greenhouse gases perform the same function as the glass in a glasshouse：they

29、 trap the heat of the sun and keep the air surrounding the earth warm.This is called the greenhouse effect.) 3Reading and comprehending1Fast readingAsk students to read the passage quickly so as to get the key words and general idea of each paragraph and answer the following questions：(1)What is the

30、 main topic of the article?_(2)Who wrote the magazine article？What is the name of the magazine?_(3)What are the names of the three scientists mentioned in the article？Do they agree with one another?_Suggested answers：(1)Global warming/the warming of the earth.(2)Sophie Armstrong，Earth Care.(3)Dr Janice Foster，Charles Keeling，George Hamb