1、Unit22Environmental Protection导学案(1)Lesson1Global WarmingCan we take the heat?(1)Common sense: Global warming means an average increase in the Earths temperature which leads to climate change.Learning aims(学习目标):A(层次): Learn and recite the new words in Lesson 1B:Keep the important words,phrases in m
2、ind Know a little about the topic- Global Warming C,D:Have a konwledge the detailed information by the readingStrategiesDevelop the habit of protecting our environment.Important and difficult point:How to understand the passage(学习重点、难点) thoroughly.Step本课单词检测.(A级)_StepBefore reading-lead in.(B级)Which
3、 countries do you think contribute more to global warming?a)developed countries b)developing countriesAnd why?_StepFast Reading:Read & match the headings. (B级)Draw readersattention Para.1What we can do Para.2What is global warming. Para.3Consequences of global warming. Para.4Causes of global warming
4、 Para.5StepRead each paragraph carefully and then fill the detailed information. (C级)Para.1Introduction: Human beings are causing _and it is believed that _could be one of the biggest _ in the 21st century.Para.2Definition: Global warming refers to _in the Earths temperature that, in turn, _ climate
5、 change.Para.3Causes: Many experts insist that the blame for this global warming can mostly _.Para.4Consequences: If we continue to produce greenhouse gases_. There will be more _such as flooding, heat waves and droughts.Para.5Action: All governments have a responsibility to _and each person should_
6、.StepLanguage points.(C级)Para.11)In the last few decades,scientists_(reach) consensus(汉意： ) and reported that human beings are causing changes in theEarths climate-something previously seen as beyond our control.汉译:_总结:in the last+时间段,表示“在过去的”,做时间状语时,常与 _(时态)连用.seen as是过去分词短语做_语,修饰_. seen as的基本形式是se
7、e sb./sth. as,意为_ 汉译英:我把她看做是我做好的朋友_ 类似的短语有:_beyond ones control_2)They claim that in the last 50 years,gases pumped into the Earths atmosphere by the factories and vehicles_(speed up) the process of global warming and affecting our climate.汉译:_pumped into是过去分词做_语,意为_speed up_3)_(look) ahead,scientis
8、ts believe that global warming could be one of the biggest environmental problems facing the 21st century.汉译:_facing 是现在分词做_语,修饰_;可换成定语从句_.在本句中意为_汉译英:他转过身来面对她_4)But what exactly is the global warming,why is it seen as a danger,and how is it relevant to our lives?汉译:_ it都指代_ be relevant to_Step阅读理解(C
9、级)Where could you find radioactivity today? For one thing, as Pierre and Marie hoped, doctors can use radioactivity to treat cancer.Radiation therapy（疗法） can treat life-threatening tumors. Doctor know how to use beams of radiation to destroy unhealthy cells in the body. They also know how to protect
10、 patients and themselves from harm as they use these radioactive beams. Scientists use radiocarbon dating to find out how old a mammoths tooth （猛犸象) is. Radiocarbon dating is one method that tell us the age of some fossils.（化石）Scientists measure the amount of carbon-14 in a fossil to figure out how
11、long ago the plant or animal died.Some food is preserved with radiation. some people worry that this process may not be safe. They wonder if it changes the food. Studies are being done to try to find answers. As in every good science process, the debate continues.1. Which one is not true about radia
12、tion? ( )A. Radioactivity can be used in many ways. B. With radiocarbon dating, we could know the possible year when a dinosaur died billions of years ago.C. Radioactivity could make contribution to people though it is dangerous.D. Food preserved with radiation may not be safe because it is changed by radiation.2.Choose the meaning of the underlined word. tumors. ( )A. medicine B. illness C. cancer D. cells3.The best title for this passage should be _.( )A. The many uses of Radioactivity B. Radioactivity and cancerC. Radiocarbon dating D. Radiation is harmful.小结与反思:_