上海牛津英语-初三年级-第二学期教案.pdf

1、9B Unit 1 Saving the earth章节综述章 节 分 析（Reading section）（一）综述本 单 元 是 关 于 一 本 有 关 地 球 环 境 的 处 于 危 险 的 书。现 在 对 地 球 环 境 存 在 很 多 威 胁。，本 文 通 过 五 个 方 面 来 描 述 地 球 所 面 对 的 危 机，学 生 通 过 阅 读 和 分 析，培养学生良好的环境保 护 意 识，让 他 们 感 觉 到 制 止 污 染 已 经 成 为 一 个 刻 不 容 缓 的 问 题。本 课 的 任 务 有 两 个：1 对 课 文 进 行 整 体 阅 读。培 养 学 生 略 读（获 取 大

2、 意）、扫 读（整 理 有 关 信 息）、细 读（分析 篇 章 结 构，概 括 中 心）等 的 阅 读 技 能。2 结 合 课 文 内 容，引导学生谈 谈 和 写 作 如 何 做 到 保 护 环 境，提 高 保 护 环 境 意 识。（二）单元目标1.知 识 与 能 力：学 习 课 文 中 重 点 单 词、词 组、句型和语法；了解课文大意。学 会 使 用as.a s来 比 较 物 品 和 事 情动 词i n g的 多 种 使 用 形 式提 高 学 生 的 阅 读 理 解 能 力 和 培 养 学 生 的 阅 读 技 巧。通 过 阅 读 准 备（收 集 与 树 木 作 用、污 染 有 关 的 资 料

3、）、略 读（获 取 大 意）、扫 读（整 理 相 关 信 息）等 方 式，培养学生理解能 力，信 息 处 理 能 力，思 维 能 力，继 续 培 养 学 生 阅 读 能 力。2.过程与方法采 用 任 务 型 教 学 法 组 织 教 学，通 过 比 较、归纳、讨 论 等 具 体 活 动，达 到 教 学 效 果。3.情 感 态度与价值观让 学 生 认 识 到 保 护 环 境 的 重 要 性，并 决 定 为 环 保 出 一 份 力，做 绿 色 环 保 者。（三）重点和难点壮 语 从 句sot h a t和so thatFirst PeriodTeaching aids:1.Students Book

4、2.cassette playerNew words and expressions:1.green consumer2.in danger3.global warming4.vital5.save the earth6.first of all7.threat8.environment9.the Greenhouse EffectlO.imagine11.atmosphere12.fuel13.keep from14.warmth15.lifeless16.pollute17.chemical绿色消费者处于危险中全球变暖致命的，重要的拯救地球首先危险，危害，威胁环境温室效应想象，设想大气燃料

5、阻止做某事温暖，暖和无生命的污染化学药品18.in the form of gases 以气态的形式存在19.keep in 抑制，保留20.carbon dioxide 二氧化碳21.environmentally friendly 环保的22.petrol 汽油23.1 evel 水平，水准24.drown 淹死Teaching procedure:I Pre-task preparation1.Warming up and introduction of the topic-Tell students something about the cartoon.The joke is a p

6、un on the two meanings of theword green.Hi has told Lo to become green,meaning that he should care for theenvironment.But Lo has misunderstood the advice from his friend,and has painted himselfthe colour green.The word green has become associated with things which are friendly to the environment.It

7、is now regularly used about products,action groups and policies2.Ask the students the following questions：a）T：What is happening to the ozone layer?S-Huge holes have appeared over the North and South Poles.b）T：What will the bad effects of cutting down trees be?S-There will be more carbon dioxide in t

8、he atmosphere.S There will be fewer animals and plants.S-Many areas will become deserts.S*The earth will become warmer.c）T：What should we do with our rubbish?S*Sort it out and recycle glass,plastic,paper and metal.d）T：If you look after the environment,what colour do we say you are?S：Green.3.Look and

9、 think：a）This exercise shows the students how to approach a new text,learning as much aspossible about it before a detailed study.b）Let the students work in pairs to complete the exercise,and then ask some pairs toreport their answers to the class.4.Read the new words.II While-task procedure1.Listen

10、 to the tape recording of the first passage2.Listen and repeat it sentence by sentence after the recording.3.Explain some new words and expressions on the reading.1）green consumer：绿色消费者consumer：（解释）a person who buys or uses something,customer（词性转换）v-consume（例句）The consumers complained about the poor

11、 quality of the electronicproducts.2）situation 情况，状况（例句）Im afraid the situation is very serious.3）in danger:处于危险中danger:危险（词性转换）adj.dangerous4）vital:致命的,重要的（解释）essential,very important（词性转换）adv-vitally（例句）1.Its vital that we do something to save the earth.2.Oxygen is vital for life.5）save the earth:

12、拯救地球save:拯救，搭救（词性转换）ad/-safe 刀：safety adV-safely6）first of a ll:首先（彳 列 句）First of all,lets invite Mr Wilson to give us a speech.7）threat:危险，危害，威胁（解释）danger（词性转换）H：threaten威胁，恐吓（例句）1.The threat of war has depressed business activity.2.He took no notice of his fathers threat.3.What are the threats to

13、the environment?4.Corruption and crime are serious threats to any society.8）environment:环境（解释）the natural world around us,surrounding（例句）If we destroy our environment,we will destroy ourselves.9）the Greenhouse Effect 温室效应10）imagine:想象,设想（解释）make a picture of something in your mind（词性转换）：imagination（

14、例句）1.He imagines that people dont believe him.2.I cant imagine what he looks like.11）atmosphere:大气（解释）the mixture of gases which are around the earth（例句）l.The rocket went up through the atmosphere and into space.2.The atmosphere covers the whole earth.12）act:生效,发生作用（解释）do sth.or behave in a certain

15、way（词性转换）faction,actor,actress adj；active（例句）Does the drug take long to act?13）keepfrom:阻止做某事（例句）She tried to keep me from seeing the letter.14）warm th:温暖，暖和（解释）heat（词性转换）adj：warm（例句）She felt the warmth of the sun on her face.15）lifeless:无生命的（解释）without any form of life,dead（例句）We think that Mars is

16、 a lifeless planet.16）pollute:污染（解释）make something dirty,unpleasant or dangerous（词性转换）n：pollutionYou can see the pollution on this beach.（例句）1.Your smoking is polluting the air in this room.2.The stadium lights polluted the sky around the observatory.17）chemical:化学药品（词性转换）n-chemistry化学18）in the form

17、 of gases:以气态的形式存在19）keep in:抑制，保留20）carbon dioxide:二氧化碳21）fuel:燃料22）petrol:汽油23)level:水平，水准(例 句)1.The garden is arranged on two levels.2.I finally found my own level in the business world.24)drown:淹死(解释)kill by covering with water(词性转换)n-drowner(例 句)1,Some plants will drown if you water them too mu

18、ch.2.Dont play by the river in case you fall in and drown.4.Read the reading together.5.T or F1)Its not vital that we do something to save the earth.F2)The atmosphere is essential to us.T3)We are polluting our earth with chemicals,so our atmosphere is changing.T4)The Greenhouse Effect is harmful to

19、the earth.T6.Ask and answer：1)Whats around our earth?What is it like?2)What would happen if there is no atmosphere around the earth?3)Why is the atmosphere changing?4)What should we do to deal with the problem?HI Post-task activity1)ask students to say something about the importance of the atmospher

20、e 基本要求2)say in your own words what the job of the atmosphere is 提高要求3).Ask some students to describe what greenhouse effect is in their own words.And draw adiagram to help you retell the text if you can.提高要求Consolidation：1.Read the reading after the tape recording 基本要求.2.Recite the new words and exp

21、ressions 基本要求3.write an article about what causes the greenhouse effect and what happened to the earth because of thegreenhouse effect 拓展要求Sum up：本课时先扫除学生的单词关，为学生接下来学习reading的内容打好基础。Second PeriodTeaching aims:To review the first passage of the reading1.To learn the second part of reading and let stu

22、dents master some words and expressions2.To tell the students about the environment,threats to the environment from pollution and how we canprotect the environment.Teaching aids:1.Students,Book2.Cassette playerNew words and expressions:1.damage损害，伤害2.the ozone layer臭氧层3.occur发生，出现，存在4.protective保护的，

23、防护的5.bum up烧起来，烧掉6.CFC氟里昂7.a spray can喷雾器，喷雾罐8.destruction破坏，毁坏，毁灭9.rain forest热带雨林lO.take in吸收11.erosion腐蚀，侵蚀12.flooding13.throw away14.massive15.do with16.billionTeaching procedure:I Pre-task preparation1.Have a dictation.洪水泛滥扔掉大规模的，大量的对付，处理十亿Around the earth,there is atmosphere,which lets the sun

24、light in and keeps the warmthfrom getting out.It is essential for all living things.Without it,the Earth would be as lifelessand cold as the surface of the moon.The greenhouse effect is happeririR because people are using many chemicals in the form ofgases and they are polluting the atmosphere aroun

25、d our earth.The gases are mainly CO2carbon dioxide,which are produced by burning fuels.2.Read the first part of the reading.3.Ask the students the following questions about the first part of reading.a）T：Is it vital that we do something to save the earth?S：Yes.b）T：What is essential to all living thin

26、gs?S-The atmosphere.c）T-Why is our atmosphere changing?S：Because we are polluting it with chemicals.d）T-How are carbon dioxide produced?S-By burning fuels such as petrol.e）T：What may the Greenhouse Effect cause?S*To cause the level of the sea to rise and drown cities and even whole countries.4.Read

27、the new words.n While-task procedure1.Listen to the tape recording of part two2.Listen and repeat it sentence by sentence after the recording.3.Explain some new words and expressions on the reading.1）damage:损害，伤害（解释）harm or hurt,especially to things（例句）The storm did a lot of damage to the crops.2）th

28、e ozone layer:臭氧层layer:层,涂层（解释）covering,thickness（例句）l.When it is cold,you need an extra layer of clothes.2.This cake has a layer of chocolate in the middle.3）occur:发生，出现，存在（解释）exist,happen（例句）1.If an earthquake occurs in California,many people may die.2.The accident occurred at five oclock.3.Such p

29、lants dont occur here.4）protective:保护的，防护的（解释）that prevents sb./sth.from being damaged or harmed（词性转换）忆 protect ：protection（例句）She is too protective towards her son.5）burn u p:烧起来，烧掉（例句）Without the ozone layer,the sun would burn us up.6）C FC:氟里昂7）a spray can:喷雾器，喷雾罐8）destruction:破坏,毁坏，毁灭（解释）destroyi

30、ng or being destroyed,damage（词性转换）adj：destructive（例句）1.The fire caused the destruction of my books.2.The war brought death and destruction to the death.9）rain forest:热带雨林10）take in:吸收（例句）People take in oxygen and give out carbon dioxide.11）erosion:腐蚀，侵蚀（解释）wearing away,gradual destruction（例句）Sand is

31、 created by the erosion of rocks.12）flooding:洪水泛滥13）throw away:扔掉14）massive:大规模的，大量的（解释）huge,very big,with a large mass（词性转换）：mass（例句）1.Ive got a massive amount of work to do.2.We must make massive efforts to improve things.15）do with:对付，处理=deal with,handle（例句）We do not know what to do with the rubb

32、ish and it pollutes our land and sea16）billion:十亿e.g.billions of4.Read the reading together.5.T or F1）The ozone layer forms an essential protective layer around the earth.T2）Using too many CFCs is not bad for us F3）The burning and cutting down of trees is making the Greenhouse Effect better.F4）Each

33、of us should become green consumers.TIII Post-task activityAsk some students to retell the reading with their own words.Consolidation：1.Read the reading after the tape recording.基本要求2.Recite the new words and expressions.基本要求3.Write something about how people are damaging the ozone layer and what people should do 拓展要求Sum up*本课时将对课文进行整体阅读。培养学生略读（获取大意）、扫 读（整理有关信息）、细 读（分析篇章结构，概括中心）等的阅读技能。课前应该准备适当的内容，