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1、RevisionRead the words and expressions we learnt last class together.How is the weather today ?Its sunny and hot.Whats the weather like today ?Its cloudyLead inWeather snowrainshowerwindcloudstormsunnycloudyrainysnowywindystormyshowerysuncool warmcold hotcloudysnowysunnyrainywindyfreezingspring 春天su
2、mmer 夏天autumn 秋天winter 冬天hotcloudyrainyhotcold snowyfreezingwarmwindyhotdrywetWhat is the difference between climate and weather?Climate refers to a relatively stable climatic condition in a place for along time, including cloudy and sunny, wet and dry, windy and rainy and so on; the whether refers
3、to a particular day of the weather. 气候指一个地方长期的较为固定气候指一个地方长期的较为固定的气候状态，包括阴晴、干湿、风雨等情的气候状态，包括阴晴、干湿、风雨等情况在内；而天气则指某特定日子的天气情况在内；而天气则指某特定日子的天气情况。况。Reading strategyExpositionStructureIntroductionMain BodyConclusionFast ReadingFind out the main idea of the text.It is true that man changes his living habits i
4、n order to adjust to climate changes as well, though more slowly.Careful ReadingRead paragraph 1-3.It is thought that differences in skin color are the result of climate adaptation .1.How is climate related to the color of human skin?Mans size Man has been on earth about one million years. He has ma
5、naged to live on every part of the planet, even though some climates have made life more difficult than others. Where man has remained, he apparently has undergone some physical changes that have helped him adapt to his climate.It is thought that differences in skin color are the result of climatic
6、adaptation. People from hot climates generally have burning black or brown skin.The lightest skinned people generally come from colder regions. Mans size also seems to vary according to climate. People living in colder regions are generally larger than those living in hotter ones.climatePhysical cha
7、ngesSkin colorMans sizeadaptHow does climate affect peoples life?Read listen find discuss 1.How is climate related to the color of human skin?It is thought that differences in skin color are the result of climate adaptation .不同的肤色被认为是适应不不同的肤色被认为是适应不同气候的结果。同气候的结果。1.How is climate related to the color
8、 of human skin?It is thought that differences in skin color are the result of climate adaptation .不同的肤色被认为是适应不不同的肤色被认为是适应不同气候的结果。同气候的结果。Mans size 2.Why are people living in colder regions bigger?Because big people have less skin compared to his weight than do small people. The less skin a person has
9、 relative to his weight, the easier it is for him to keep warm.因为个子大的人的皮肤与其体重相比较比个子小的人因为个子大的人的皮肤与其体重相比较比个子小的人要少一些。相对于其体重，一个人的皮肤越少就越容要少一些。相对于其体重，一个人的皮肤越少就越容易保暖。易保暖。Language PointsLanguage Points1.size2.explain3. pared to6.6.lesslittle leastlittle least7. weighweight8. relative to9.the 比较级比较级the 比较级比较
10、级10. ?2.Why are people living in colder regions bigger?Because big people have less skin compared to his weight than do small people.The less skin a person has relative to his weight, the easier it is for him to keep warm.因为个子大的人的皮肤与其体重相比较比个子小的人因为个子大的人的皮肤与其体重相比较比个子小的人要少一些。相对于其体重，一个人的皮肤越少就越容要少一些。相对于其
11、体重，一个人的皮肤越少就越容易保暖。易保暖。3.How does climate affect peoples activities?Climate has significant effect on agriculture.Climate factors such as the length of the growing season.The total amount of rainfall,and the daily and seasonal changes in temperature restrict the kinds of crops that can be grown.Langu
12、age PointsLanguage Points1.naturalnature2. affect2. affecteffect3.humanMan4.4.activity5.significant5.significant6. factfactor7. longlength8. rainfallsnowfall9.restrictstrict10.climatic factors?3.How does climate affect peoples activities?Climate has significant effect on agriculture.Climate factors
13、such as the length of the growing season.The total amount of rainfall,and the daily and seasonal changes in temperature restrict the kinds of crops that can be grown.4.how does climate affect transportation?Climate also affects transportation,such as the frequentstorms can make transportation slow d
14、own or interruoted.Language PointsLanguage Points1.transportation2.frequent3. stormstormy4.interrupt5.Air travel6.freezefroznfrozn7. blockBe blocked by8. impossablepossable9.Be +过去分词过去分词？4.how does climate affect transportation?Climate also affects transportation,such as the frequentstorms can make transportation slow down or interruoted.Can we affect the climate?天气战争Home workFinish the exercise on page 122Write a short passage about climateRead and try to recite the text.
