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1、Unit 4 Global warmingenergy sourcesWe 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. stovelight things that use energy in y
2、our homemicro-wave oven cassette playerheatingtelevisionhairdryervideo playerfridgecomputerwashing machinestoveWind energy is used as power toproduce electricity .Windmillswhere electricity is produced by burning coals.The coal power stationsin which oil is refined and made pure. The Oil Refineriesa
3、 facility designed to convert nuclear energy into electricity.A nuclear power planton 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 panelsare used to keep back water and raise its level for irrigation or for producing e
4、lectricity, etc.The Hydro- electric damsGuess it!Uranium Ore (铀矿石)The element uranium does not occur in pure form in nature but is found in minerals such as carnotite（钒钾铀矿）, pictured here.What source of energy?Geysers(间歇泉)Geothermal (地热的) Energy PlantAn energy source is “renewable” when supplies of
5、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?DiscussThings that use energy in your homeSources of energyRenewable/non- renewablelightheating television cassette playervideo player computer fridge sto
6、vewashing machinehairdryercoaloilnatural gaswind (wind power)sun (solar energy)uranium (nuclear energy)water (hydro-electric power)plant waste (biomass energy)hot spring or geysers (geothermal energy)the sea (tidal energy)non-renewablenon-renewablenon-renewablerenewablerenewablenon-renewablerenewabl
7、erenewablerenewablerenewableWhat are these buildings made of and what is their purpose? 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!Whats greenhous
8、e 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 ReadingGlance at the article and answer the ques
9、tion.It has a title, a first paragraph that runs across the page and is in bold, the main text in two columns, graphs/diagrams, two quotes.What is the structure of a magazine like this and how is the text organized? Reading comprehensionRead the article again and finish comprehending on page 27Sophi
10、e 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 thin
11、k 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 incr
12、ease 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 last century didnt increase much.2.Everyone believes tha
13、t global warming is caused by the activities of humans.3.Janice Foster believes that global warming is caused by burning fossil fuels.4.Natural gas is a greenhouse gas.5.Carbon dioxide is a byproduct of burning fossil fuels.6.People accept Charles Keelings data because he took accurate measurements.
14、 Read the article carefully. Tell true or false.TTFT TFDetailed-Reading Read the article in details and finish the following task.listening1. 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 Armstro
15、ng.Listen to the reading passage and do some choices.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 the day of its issue. B. They are talking about one of the key issues in the election camp
16、aign. 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
