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1、 Unit 4 Global warming 教学目标Teaching Aims1. Enable the students to learn the following useful new words and expressions：fossil fuel, go up, come about, flood, drought, famine etc. by pictures.2. Enable students to master the reading skills by skimming, scanning.3. Enable students to get the knowledge
2、 of global warming through the reading strategies and skills. 重点难点Teaching Important and Difficult PointsEnable the students to get information about global warming using the reading strategies and skills. 情感态度Emotion, attitude and valueEnable the students to be more aware of the importance of stopp
3、ing global warming 教学方法Teaching MethodsAsking-and-answering activity to check the students understanding of the text；individual，pair or group work to finish each task.5教学过程 活动1【教案】Globle warmingTeaching ProceduresStep 1. Lead-in1) Greetings and lead in.Show a film of The Day After Tomorrow and ask t
4、hem the following question:What can you see in the film?-hurricane, tsunami, glacier melting .What other disasters do you know？-Flood, drought, famine.What causes the disasters?-Its the global warming.What causes the the global warming?-Picture1: the burning of fossil fuelsPicture2: greenhouse gases
5、: carbon dioxide, water vapor, methaneAs a result, the earth will become warmer and warmer.Step 2. Skimming:Glance the first paragraph:1. Who wrote the magazine article?A. Janice Foster B. Sophie Armstrong2. What is the topic of the article?A. The earth B. Global warming3. There are the names of the
6、 three scientistsin the article EXCEPT_.A. Dr Janice Foster B. Sophie ArmstrongC. Charles Keeling D. George HambleyStep 3. Scanning for detailed information (Group work)Part2(2-5)1. What do the two graphs show?-The first graph shows the temperature increase of one degree Fahrenheit between 1860 to 2
7、000.-The second graph shows carbon dioxide went up from 1957 to 19972. What do you know about greenhouse effect?Greenhouse gases trap(吸收) the heat from the sun and therefore warm the earth.3. Which following is NOT TRUE about global warming? (D)A. The increase of temperature is due of the burning of
8、 the fossil fuels.B. The burning of the fossil fuels caused the increase in carbon dioxide.C. All believes that activities of humans have caused global warming.D. The attitudes of scientists toward it are the same.The different ideas of the effects of the global warming Part3(6)Dr. FosterHambleyMore
9、 carbon dioxide has negative effects:rise of the sea levelsevere storms, droughts,floods, famines,the spread of diseases,the disappearance of species.More carbon dioxide is a _positive_ thing,makes crops _produce_ more and will encourage _a great range of animals_.Step 4. SummaryWhat can we learn fr
10、om the text? Fill in the bland.A. fossil fuels B. human activity C.warmer D.different E. heatEveryone believes that the earth is becoming _. _ has caused this global warming: human produce energy by burning _. During this process, greenhouse gases are produced. Greenhouse gases can trap _ from the s
11、un and warm the earth which is called “greenhouse effect”. The attitudes of scientists towards global warming are _. On the one hand, it is a positive thing. On the other hand, if there are too many greenhouse gases, more heat will be trapped, causing global warming.Step 5. After-reading group workW
12、hat should we do to stop global warming?Discussion: Suggestions on global warming:turn off the electrical appliancetalk with family and friends about itrecycle things like bottles, plasticsplant more treesride bike rather than carwords 参考词汇: reduce, carbon dioxide, absorb, environment, plant, electr
13、ical appliances, recycleSentences structures 句型:We should . in order to .moIt is a good idea to . because it can .e.g. We should plant more trees in order to absorb the carbon dioxide .It is a good idea to plant more trees because it can absorb the carbon dioxide .Suggestions about global warmingNow
14、adays, global warming is becoming warmer and warmer. Its time for us to take some actions to deal with it.Firstly, we should _ in order to _.Secondly, its a good idea to _ because _.Finally, why not _ because_.Let us save energy and stop the global warming together.Step 6. HomeworkWrite a short passage about the suggestions.
