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1、Unit 4 Global WarmingPeriod 1一、（1）Teaching aim 阅读部分是一篇杂志文章，主要讲述了地球温度上升的原因和现象。通过学习本单元阅读，让学生了解能源分为“不可再生能源和”再生能源”，帮助学生树立“节约能源，保护环境”的主人翁意识。学习有关气候，能源，环保的词汇。学会表达同意和不同意责备和抱怨等交际用语。（2）Important points1. random2quantity 3catastrophe 4subscribe 5state 6tend 7range 8Glance 9. run out 10. come about 11. subscrib
2、e to 12. quantities of 13. go up 14. result in 15. be opposed to 16. build up 17. even if 18. keep on （3）Difficult points1It means that more heat energy tends to be trapped in the atmosphere causing the global temperature to go up.2On the other hand, there are those, like George Hambley, who are opp
3、osed to this view and believe that we should not worry about high levels of carbon dioxide in the air.句式分析二(1) Preview before class 1random Aa quick look2quantity Ban amount or a number of sth.3catastrophe Cto pay money regularly to support a charity4subscribe Dto express something in speech or writ
4、ing, especially in a definite or formal way5state Ehappening or chosen without any definite plan, aim.6tend Fto take a particular direction7range Ga sudden event resulting in great loss and misfortune8glance Hthe limits between which sth. varies; a set of products of a particular type答案：18EBGCDFHA.写
5、出下列句中斜体短语的汉语意义1How did the accident come about？ 发生2I dont subscribe to your opinion. 同意；赞成3She has quantities of good clothes. 大量的；许多4The sun goes up in the morning . 升起5Our efforts resulted in success. 导致；带来6She is strongly opposed to their plan. 反对7He will come on time even if it rains. 即使8They ke
6、pt on working although they were tired. 继续（2）Question and inquiry We depend on energy to do many things. Can you name out the following kinds of energy?答案：A. fuelsB. wind powerC. waterD. nuclear energyE. sun (solar energy)（3）Practice and consolidation()Skim the text and choose the main idea of the p
7、assage.AWhen the “greenhouse effect” started.BWhat causes the “greenhouse effect”CDr.Janice Fosters theory on the “greenhouse effect”DThe fact that the earth is becoming warmer and different theories about it.答案：D()Read the text again and choose the best answer.1How much did the temperature rise in
8、the 1900s?AOne degree Fahrenheit.BOne Celsius.CTwo degrees.DThirty degrees Celsius.2What causes the earths temperature increasing?ACutting trees.BWasting the farmland.CRunning out of the river water.DBurning fossil fuels.3Which of the following is Dr Janice Fosters opinion?AThe result of the tempera
9、ture increase will be serious. BThe amount of warming is nothing serious.CWe neednt worry about high levels of carbon dioxide.DGlobal warming is a natural phenomenon.4According to George Hambley，_Aglobal warming is a very serious problemBtheres no need to worry about global warmingCthe levels of CO2
10、 in the air will become lower in the futureDmore animals will make greenhouse gases decrease5We can infer from the text that _Athe debate about the effects of global warming has not been settledBthe greenhouse effect is the result of peoples actionsCall scientists think it is important to reduce the
11、 amount of CO2 in the atmosphereDreducing greenhouse gases will immediately decrease the earths temperature答案：15ADABA()Read the text carefully and then fill in the chart with the information in the text.THE EARTH IS BECOMING WARMERBUT DOES IT MATTER？During the 20th century the temperature of the ear
12、th rose about one degree Fahrenheit.The burning of fossil_fuels like coal, natural gas and oil to produce energy.The levels of carbon dioxide have increased greatly over the last 100 to 150 years. Charles Keeling found that the carbon dioxide in the atmosphere went up from around 315 parts to around
13、 370 parts per million between 1957 and 1997.Dr Janice Foster says that the amount of warming could be as low as 1 to 1.5 degrees Celsius, but it could be as high as 5 degrees over the next100 years.The climate could be very seriousA rise of several metres in the sea_levelSevere storms, floods，droug
14、hts,_famines.The spread of diseases.The disappearance of speciesWe should not worry about high levels of carbon dioxide in the air. It will make plants grow quicker;_crops will produce more;_it will encourage a greater range of animals.四 Test for goal阅读理解New photographs of the Himalayas have been taken from the same location that English explorer George Mallory took pictures in 1921. These new photos reveal that there has been a large amount of ice that has disappeared since these photographs were taken.The latest photographs were taken in 2010 by American mountaineer and filmma
