Unit4_Global_warming课件29(新人教版选修6）.ppt

Unit 4　Global warming 漫 画 欣 赏　 ;画 面 描 述 　 Two men are staring at a potted flower with different expressions on their faces.One man is thinking about the sad ending of the flower while the other is imagining the flower blooming. 寓 意 理 解　 　Faced with the same situation，pessimistic people may feel helpless and complain about it all day long.Optimistic people，however，may look at it positively and take it as a chance to show his abilities and talents. 你能否对此加以扩展，写一篇120词左右的小短文？; 短文填空 根据课文THE EARTH IS BECOMING WARMER BUT DOES IT MATTER？完成下列短文。 There is no _____ that the earth is becoming warmer but there is a fierce debate over whether it is human activity that has caused this global warming or whether it is just a natural phenomenon. Many scientists like Dr Janice Foster believe that people have caused the increase in the earth’s temperature __ burning fossil fuels like coal，natural gas and oil to produce energy ______ byproducts are called “greenhouse” gases,the most important one;_____ carbon dioxide. These gases trap heat from the sun and therefore warm the earth，without which the earth ________ (be) about thirty-three degrees Celsius cooler than it is. But increased amount of carbon dioxide means that ____ heat energy is trapped in the atmosphere，_______ (cause) the global temperature to go __. On ___ other hand，scientists like George Hambley believe that any warming will be mild with ___ bad environmental consequences and more carbon dioxide is actually a positive thing. ; Ⅰ.单词拼写 1．A __________ (广泛传播的) flu epidemic affected eighteen western states. 2．There has been serious ____________ (分歧) between the 2 political parties over the question. 3．He couldn’t stand that terrible English ________(气候)． 4．The population had _________ (减少) from about 8,300,000 in 1845 to less than 6,600,000 in 1851. 5．The ________(平均数) of 3,6 and 9 is 6. 　;6．A child who can remember 3,000 English words at the age of 3 wou