人教新课标选修六Unit4GlobalwarmingWarmingupReading3

人教新课标选修六Unit4GlobalwarmingWarmingupReading3

Unit 4 ---warming up and reading Global warming Extreme heat 酷暑 Can you think of some natural disasters (自然灾害) because of the extreme heat? drought(旱灾) I feel hot ! . × √ Is the whole world becoming warmer and warmer? Why? population air pollution … carbon dioxide acid rain species extinction water pollution 全球气候变暖是一种“自然现象”。人们焚烧 化石矿物以生成能量或砍伐森林并将其焚烧时会产 生二氧化碳等多种温室气体。这些温室气体对来自 太阳辐射的可见光具有高度的透过性，而对地球反 射出来的长波辐射具有高度的吸收性，能强烈吸收 地面辐射中的红外线，导致全球气候变暖，也就是 常说的“温室效应”。全球变暖会使全球降水量重 新分配、冰川和冻土消融、海平面上升等，既危害 自然生态系统的平衡，更威胁人类的食物供应和居 住环境。 energy sources We depend on energy to do many things in our daily lives. For example, energy lights our cities and heats our buildings. Make a list of things that use energy in your home, in your school, or any other places you can think of. stove light things that use energy in your home micro-wave oven cassette player heating television hairdryer video player fridge computer washing machine stove Wind energy is used as power to produce electricity . Windmills where electricity is produced by burning coals. The coal power stations in which oil is refined and made pure. The Oil Refineries to change nuclear energy into electricity. A nuclear power plant on the roof of a house on a bright sunny day are used to collect solar energy, making your house warm or heating your water. Solar panels The Hydro-electric dams are used to keep back water and raise its level for irrigation or for producing electricity, etc. An energy source is “renewable” when supplies of it never run out and “non- renewable” when one day they will run out. Which energy sources on your list are renewable and which are non-renewable? Discuss Sources of energy Renewable/non-renewable coal oil natural gas wind (wind power) sun (solar energy) nuclear energy water (hydro-electric power) the sea (tidal energy) non-renewable non-renewable non-renewable renewable renewable non-renewable renewable renewable Pre-reading What is the greenhouse made and used for? greenhouse They are made of glass and plants can grow in it when it is cold outside. How does it work? The glass traps the heat from the sun, making the air warm so that plants can grow better. Greenhouse gases! What’s greenhouse gases effect? Greenhouse gases perform the same function as the glass in a greenhouse --- They trap the heat of the sun and keep the air surrounding the earth warm. It is called the greenhouse effect. The Earth Is Becoming Warmer – But Does It Matter? Fast Reading Glance at the article and answer these questions. Sophie Armstrong wrote the magazine article. The name of the magazine is “Earth care”. 2.What are the names of the three scientists mentioned in the article? They are Dr. Janice Foster, Charles Keeling and George Hambley. 1.Who wrote the magazine article? What is the name of the magazine? 3.What do they think about global warming? Do they agree with one another? There are some very different attitudes among scientists towards this issue. Some think the effects will be terrible, while some others believe that we should not worry about it. 4.What are the two graphs about? Graph 1 shows the temperature increase of one degree Fahrenheit between 1860 to 2000. Graph 2 shows the carbon dioxide content in the atmosphere from 1957 to 1997. Graph 1: Graph 2: 5.What is the main topic of the article? Global warming / The warming of the earth. 1.The temperature in the last century didn’t increase much. 2.Everyone believes that global warming is caused by the activities of humans. 3.Janice Foster believes that she can measure the future global rise in temperature. 4.The rise in carbon dioxide is causing a steady increase in global warming. 5.George Hambley believes that global warming will do good rather than harm to earth. 6.It is clear what the effects of global warming will be. Read the article carefully. Tell true or false. T T F T T F Detailed-Reading Read the article in details and finish the following task. 1. Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977? A. Dr. Janice Foster. B. Charles Keeling. C. George Hambley. D. Sophie Armstrong. 2. "But there are some very different attitudes among scientists towards this issue.” “issue" here means the same as the one in___ . A. I bought the new stamp on the day of its issue. B. They are talking about one of the key issues in the election campaign. C. The government is expected to issue a statement about the election. D. The magazine has 12 issues each year. 3. The author probably agrees that ________ A. actually global warming is good for man. B. we should do nothing about the global warming. C. catastrophes will happen if the globe keeps on warming. D. a lot remains to be found out about the effects of global warming. 4. How has the global warming come about? ①Human activity--- burning of fossil fuels. ② Greenhouse effect--- greenhouse gases--- we need those gases. ③ Huge quantities of extra carbon dioxide---from 1957 to 1997---from around 315 parts per million to around 370 parts per million. 5.What are the effects of global warming? ④ Encourage a greater range of animals. ①The sea level to rise. ② Severe storms, droughts, famines, the spread of diseases, and destruction of species. ③ Make plants grow faster. Crops will produce more. Paragraph 1 Paragraphs 2&5 Paragraph 6 Part1 Part2 Part4 Main idea of the text Part3 Paragraph 7 How global warming comes about? (全球变暖是怎样产生的) Two different opinions about global warming. The earth is becoming warmer. Should we do anything? The different ideas between Dr. Janice Foster & George Hambley Dr. Janice Foster George Hambley Carbon dioxide has caused the global temperature to __________. An increase of five degrees would be a ____________ and could be ______________. More carbon dioxide is a __________ thing, which makes crops __________ and will encourage ____________________. go up catastrophe very serious positive produce a greater range of animals