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课件网) Unit 4 Global Warming Global Warming Can you describe this cartoon From the cartoon, we a draw a conclusion: List things that use energy sources of energy renewable / non-renewable We depend on energy to do many things in our daily lives. Make a list of the things that consume energy in your home, school or any other places. Lights, heating, television, pad, video recorder, computer, fridge, washing machine, hair dryer, air conditioner, cars…. Where does the energy come from Energy sources: renewable and non-renewable sources. Renewable sources: energy sources that never run out. Non-renewable : energy sources that will run out one day. Make a list of energy sources. a coal power Station (燃煤发电站) non-renewable coal wind power (风力) renewable Oil (an oil refinery) 炼油厂 non-renewable [ri'fain ri]精炼厂 solar-energy renewable nuclear energy (a nuclear power plant核电站 ) natural gas Plant waste hot springs (温泉) the sea (tidal energy潮汐能 ) Water (hydro-electric power) non-renewable renewable renewable renewable renewable non-renewable more sources of energy renewable or non-renewable 1. consume energy 2. greenhouse 3. greenhouse gases 4. the greenhouse effect 5. degree Fahrenheit 6. degree Celsius 7. atmosphere 8. fossil fuel 9. carbon dioxide 10. renewable source 11. non-renewable source 12. Natural resources 消耗能源 温室 温室气体 温室效应 华氏度 摄氏度 大气层 化石燃料 二氧化碳 可再生资源 不可再生资源 天然资源 Related words : ['f r nhait] ['selsi s] Now that we have learned some sources of energy are non-renewable, What should we do with energy -- We should save energy and thus reduce the emission (排放) of greenhouse gases. a greenhouse Pre-reading What is a greenhouse made of How does it work It is made of _____and plants can grow in it when it’s cold outside, because the glass_____ the heat_____ the sun and keeps it from _____.This makes the greenhouse _____ ____and so the plants can grow throughout the cold period. glass traps from escaping heat up What function do greenhouse gases play Greenhouse gases perform the same function as _____of a glasshouse. They _____heat from the sun and keep the air s_____the earth warm, which is called _____effect. 温室效应 Do we need those gases Without the “greenhouse effect”, what would happen The earth would be about 33 ℃ cooler than it is. the glass trap urrounding the greenhouse The Earth is Becoming Warmer --But Does It Matter 1) How many paragraphs does the reading 2) What are the two graphs about 3) What skills are used in the four parts Read the passage quickly (3’) text consist of Please number them. Fast-Reading What are the two graphs about The first graph shows the temperature increase of one degree Fahrenheit between 1860 to 2000. The second graph shows the carbon dioxide content in the atmosphere from 1957 to 1997. Main ideas of each part: skills Part1 (1) Introduce a debate over the issue of global warming. raising ... ...
