warming up and reading of Unit4 Book6.ppt

1、,Unit 4 Global Warming,Book 6,Work in groups -list things as required: 1. Things that use energy around us or at any other places, (ie. light),2.Sources of energy (ie. coal),Warming up I ( m ),Things that use energy around us or at any other places:,In a house,lights television cassette player compu

2、ter fridge stove 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 waster(biomass energy),Windmills, renewable.,What? Renewable?,Warming up II ( 5 m ),What? What kind? Rene

3、wable?,A coal power station, non-renewable.,What? What kind? Renewable?,An oil refinery (精炼厂), non-renewable.,What? What kind? Renewable?,A nuclear power plant, non-renewable.,What? What kind? Renewable?,A hydro-electric dam, renewable.,Geothermal (地热的) Energy Plant,Coal Oil Natural gas Uranium,Wind

4、 (wind power) Sun (solar energy) Water (hydro-electric power) Plant waste (biomass energy) Hot springs or geysers (geothermal energy) The sea (tidal energy),Fossil fuels,Non-renewable,Renewable,What are fossil fuels?,Ancient animal and plant material below the surface of the earth with a high carbon

5、 content, such as coal, oil and natural gas, which can be burnt to produce energy. Also known as non-renewable energy because once they are used they have gone forever; they cannot be renewed.,What about the weather?,9 / 14,We need,Pre-reading ( 3m ),The sun.,How about the plants?,If lack of solar e

6、nergy, the plants,Greenhouse,Greenhouse gases!,What are greenhouse gases? Whats greenhouse effect?,Lets see the following picture about it.,I wrote a poem last week,寒冬变暖春， 天象见奇闻。 仰首问穹顶， 晴空应无声。 低头再思忖， 问责在苍生。,What natural phenomenon does the poem indicate？,The earth is becoming warmer,What is the caus

7、e resulting in the abnormal phenomenon？,The Earth Is Becoming Warmer-,But Does It Matter?,Sophie Armstrong,Earth Care 关爱地球,Dr Janice Foster,Scanning,George Hambley,Charles Keeling,(Paragraph 1),Introduce a debate over the issue of global warming.,Raising a question,Skimming,(Paragraphs 2-5),Illustra

8、te how global warming comes about.,Giving examples, using graphs, explanation.,(Paragraphs 6),List two different attitudes among scientists towards global warming.,Giving examples, making contrast.,(Paragraph 7),Its up to readers to think and decide whether people should do something about global wa

9、rming or not.,Using a question, leaving readers to think over the issue.,Careful reading .Make true or false,1.The temperature last century didnt increase much . 2. Everyone believes that lobal warming is caused by the activities of humans. Janice Foster believes that global warming is caused by bur

10、ning fossil fuels . 4.Natural gas is a greenhouse gas .,increased,Not everyone,a fossil fuel.,T,F,F,F,5. Carbon dioxide is a byproduct of burning fossil fuels. 6. People accept Charles Keelings data because he took accurate measurements . 7 Flooding could be one of the effects of future global warmi

11、ng .,T,T,T,8. George Hambley believes scientists are just guessing about the effects of global warming . 9. George Hambley is worried about the effects of carbon dioxide on plant growth . 10. It is clear what the effects of global warming will be .,not worried about,unknown,T,F,F,. What do the two g

12、raphs show us?,From 1860 to 2000, the global _ has risen about _degree Fahrenheit.,temperature,1,Between _and_, the carbon dioxide content of the atmosphere went up from around _per million to around_ per million.,1957,1997,315 parts,370 parts.,Charles Keeling,1997,go up,catastrophe,very serious,pos

13、itive,produce,a greater range of animals,positive,negative,.The different ideas between Dr. Janice Foster & George Hambley,Dr. Janice Foster,George Hambley,Step 4 Summary Fill in the blanks according to the text.,There is no 1._ that the earth is be coming warmer and warmer no matter whether it is a

14、 natural 2._ . Scientists believe that “greenhouse effect” begins when we add huge 3._ extra carbon dioxide into the atmosphere by burning 4._ .The increase amount of carbon dioxide is causing the global temperatrue to 5._.,doubt,phenomenon,quantities of,fuels,Go up,Scientinst also agree that it is

15、the burning of more and more fossil fuels that has resulted in this increase in dioxide .On the one hand ,Dr.Forster thinks that an increase of five degrees would be a 6._,scientists cant predict the climate well enough to know what to expect.,catastrophe,On the other hand ,a scientsit ,Geoge Hamble

16、y predicts that any warming will be mild with few bad environmental 7._ .He 8._ that more carbon dioxide will encourage a greater 9._ of animal ,all of which will make life for human beings better. However,greenhouse gases continue to 10._ in the atmosphere and the climate is going to keep on warmin

17、g. .,consequences,states,range,build up,Do they have a conclusion at last?,No one knows what the effects of global warming will be.,Protect our environment,What should we do to protect the environment?,Discussion,What should we do to protect the environment?,Turn the lights off when you dont use them. Walk or ride a bike, dont drive. Plant more trees. Use less plastic bag.,Go into action now!,Conclusion,Global warming has attracted the worlds attention ,because it affects us and will affect our later genera