Unit 4 Global warmingUnit 4The fourth period Teaching methods situational teaching method ; cooperative learning method; programmed teaching method; task-based and assessment teaching methods.Teaching aims and demands一、 topic: Global warming; pollution; the importance of protecting the earth二、 vocabulary三、 functions: Agreement and disagreement①②Blame and complaint四、 grammar : The use of ‘it’Arrangement of teachingthe first period: warming upthe second period: language points of readingthe third period : readingthe fourth period : learning about language and language points of using languagethe fifth period: using languagethe sixth period: grammarthe seventh period: exercises 1. Check up Daily ExercisesDiscovering useful words and expressions (P28) Go over the new words and phrases in the previous sections. Then complete each sentence with one of those new words or phrases.21. Charles Keeling collected ______on the carbon dioxide content in the atmosphere over a forty-year period. He found that the amount of carbon dioxide _______ increasing during that time.datakept on2. Although we are burning coal in huge _________ every year, we won't ________ of it for centuries.3. If the amount of greenhouse gases continues to _______, we could be facing a global __________ .quantitiesrun outbuild upcatastrophe4. Many scientists believe that global warming has __________ through the burning of fossil fuels. come about5. The _____________ of a rising sea level would be widespread flooding.consequence6. On the whole the warming of the earth is a ____________ that causes great concern.7. The __________ shows temperature changes during the 20th century.8. One hectare of forest can absorb 23 tons of carbon dioxide ____ year...
