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1、 Unit 4 Unit 4Global warmingGlobal warming Energy sources?International relations? Money?Technology? Which is the most important to a country? Man power?stove light things that use energy in your home micro-wave oven cassette player heating television hairdryer video player fridge computer washing m
2、achine stovelist things that use energy around us or at any other places,( ie. light)windmillsa coal power stationThe Oil RefineriesA nuclear power plantSolar panelsThe Hydro-electric damsWHAT SOURCE OF ENERGY? Geysers(間歇泉間歇泉)GEOTHERMAL (地?zé)岬牡責(zé)岬? ENERGY PLANTRenewable or non-renewable?Renewable or no
3、n-renewable?What is told in the picture?What are they? 1. What is a greenhouse made of and used for?2. How does it work? A greenhouse is made of glass and is used for growing plants, especially during cold weather.How does it work? The air inside is warm because the glass traps the heat from the sun
4、 and keeps it from escaping. This makes the greenhouse heat up and so the plants can grow throughout the cold period.SO The earth is becoming warmer and warmerWhats wrong with our earth?methaneCarbon dioxideWater vapourWater vapourWhat are the “greenhouse gases”? Carbon dioxide, methane and water va
5、por.What do you think greenhouse gases do? They trap heat from the sun and therefore warm the earth.Reading: The Earth is Becoming Warmer-But Does It Matter?P26This article is from _.a. a magazineb. the internet c. a book A title, a first paragraph that is in bold, the main text in two narrow column
6、s; two graphs; two quotes.Pre-ReadingFast ReadingGlance and Answer!1.Who wrote the magazine article? What is the name of the magazine?2. What are names of the three scientists mentioned in the text?3. What is the main topic of the article?1.Who wrote the magazine article? What is the name of the mag
7、azine? Sophie Armstrong The name of the magazine is Earth Care.Dr. Janice Foster2. What are the names of the three scientists mentioned in the article?Charles KeelingGeorge Hambley3. What is the main topic of the article? global warmingCareful Reading1. How has the global warming come about?2. What
8、are the effects of global warming?1. How has global warming come about?There is a fierce debate over it. 1. Human activity2. Just a natural phenomenon Dr Janice FosterHuman activityburnig of fossil fuelsGreenhouse effectgreenhouse gases we need those gases from around 315 parts per million to around
9、 370 parts per millionHuge quantities of extra carbon dioxideFrom 1957 to 19972. What are the effects of global warming? Does it matter?Careful ReadingPositive effects Negative effects Maybe The sea level will riseMaybeThere will have some disasters,such asFlood!DroughtFamineForest Fire!1. cause the
10、 sea level to rise2. severe storms3. droughts4. famines5. the spread of diseases6. destruction of speciesPositive effects Negative effects 1. make plants grow faster2. crops will produce more3. a greater range of animals4. make life better George HambleyThe Earth is Becoming Warmer-But Does It Matte
11、r?YES & NO ?P26The earth is becoming warmer, in your opinion, does it matter? If it does, as a student, what can you do about it?True or falseRead the article Read the article carefully and finish carefully and finish Part 2 on page 27Part 2 on page 271.The temperature last century didnt increase mu
12、ch.2.Everyone believes that global warming is caused by the activities of humans.3.Janice Foster believes that global warming is caused by burning fossil fuels. F F F FT TP1: it is a rapid increase compared to most natural changes P2: there is fierce debate over it 4.Natural gas is a greenhouse gas.
13、5.Carbon dioxide is a byproduct of burning fossil fuels. F F T TP3: Fossil fuels: coal, natural gas and oil. 6.People accept Charles Keelings data because he took accurate measurements. T T7.Flooding could be one of the effects of future global warming.8.George Hambley believes scientists are just g
14、uessing 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. T T T T F F F FP10: positive P11: No one knows P10: speculationThe 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.Further understanding Homework: Write down your ideas
高二英語選修6 Unit4 global warming (ppt)
