选修6unit4-Global warming-reading.ppt

1、Unit4 Global Warming The Earth Is Becoming Warmer But Does It Matter?,Work in groups -list things as required : 1. Things that consume energy around us or at any other places.,2.Sources of energy,Warming up I ( m ),Things that use energy,In a house,lights television cassette player computer fridge s

2、tove washing machine hairdryer video recorder,coal oil natural gas wind(power) sun(solar energy) water(hydro-electric power) the sea ( tidal energy) uranium(nuclear energy) plant (biomass energy),Windmills, renewable.,What? Renewable?,Warming up P 25,What? Renewable?,A coal power station , non-renew

3、able.,What? Renewable?,An oil refinery(精炼厂), non-renewable.,What? Renewable?,A nuclear power station, non-renewable.,solar panels renewable,What? Renewable?,What? Renewable?,A hydro-electric dam, renewable.,Geothermal (地热的) Energy Plant,What is the greenhouse made of and used for?,What is this?,The

4、sun.,Greenhouse,How does it work? The air inside is warm because the glass traps the heat from the sun and keeps it from escaping. This makes the greenhouse heat up and so the plants can grow throughout the cold period.,Questions,What is greenhouse effect?,green house effect,Carbon-dioxide,The leadi

5、ng gasses are: Carbon-dioxide Methane Ozone(O3) Nitrous Oxide(N2O),Which greenhouse gases do you know?,As the earth is becoming warmer, there are many disasters.,tsunami,The rise of the sea level,floods,snow disaster,famines,the spread of diseases,droughts,Listen to the tape and find out the main id

6、ea of the passage:,Reading,Part 1(Paragraphs 1) Part 2(Paragraphs 2-5) Part 3(Paragraphs6),Introduce a debate over the issue of global warming.,Describe how global warming comes about.,List two different attitudes among scientists towards global warming.,Part 4(Pa 7),Its up to readers to think and d

7、ecide whether people should do something about global warming or not.,Choices.,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.,B, ,Reading IV (3m),2. The author probably agrees that _A. actually global warming is good for mankind.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 w