发布时间 : 星期三 文章2019-2020学年高中英语 Unit 4 Global warming Period One更新完毕开始阅读
Unit 4 Global warming
The Arctic will soon be free from ice，experts say.The change is sure to take place，but global warming and climate change are changing the earth’s landscape(地形) rapidly，causing anxiety worldwide.
Experts say that the Arctic sea ice is melting quite faster than expected and it can affect not just the region，but Earth in general.A scientist even says that next year，or maybe the year after that，the Arctic will be free of ice.
Peter Wadhams，director of the Scott Polar Institute in Cambridge，said，“Most people expect this year will see a record low in the Arctic’s summer sea ice cover.Next year or the year after that，I think it will be free of ice in summer and by that I mean the central Arctic will be ice-free.” “You will be able to cross over the North Pole by ship，” he added.
Wadhams’ study says that melting sea ice will have a great influence on the planet since the sea ice is more capable of reflecting(反射) sunlight compared to water that can only reflect 10% of the sunlight.Once the sea ice melts，the water can only reflect a small amount of sunlight.This means that the Earth will receive and absorb more sunlight，making the planet even hotter.
The year 2016 had already broken records of the hottest temperature ever recorded and the trend doesn’t seem to show any decrease in global warming.“It doesn’t look like the ice is healing and growing back，” Tom Wagner，NASA’s manager said in a report.
Like Wadhams，scientists and researchers all over the world are lecturing around to educate people to help lighten global warming that has already changed the planet’s landscape. 判断正(T)误(F)
1．The speed of the Arctic sea ice being melting is beyond expectation.(T) 2．The Arctic won’t be free from ice soon because of global warming and climate change.(F)
Period One Warming Up & Reading—Pre-reading
匹配左边的单词与右边的汉语意思 [第一组]
1．consume 2．random 3．phenomenon 4．subscribe 5．fuel 答案 1.C 2.D 3.E 4.B 5.A [第二组]
6．quantity 7．oppose 8．state 9．trend 10．catastrophe 答案 6.B 7.A 8.E 9.D 10.C [第三组]
11．range 12．consequence 13．mild 14．flood 15．drought
A．n.洪水；水灾 B．n.旱灾；干旱 C．n.结果；后果；影响 D．adj.温和的；温柔的；淡的 E．n.种类；范围 A．vt.反对；反抗 B．n.量；数量 C．n.大灾难；浩劫 D．n.趋势；趋向；走向 E．vt.陈述；说明 A．n.燃料
B．vi.同意；捐赠；订阅 C．vt.消费；消耗；耗尽 D．adj.胡乱的；任意的 E．n.现象
答案 11.E 12.C 13.D 14.A 15.B [第四组]
16．famine 17．data 18．byproduct 19．tend 20．fossil
A．vi.趋向；易于；vt.照顾；护理 B．n.资料；数据 C．n.化石 D．n.饥荒 E．n.副产品
答案 16.D 17.B 18.E 19.A 20.C
Step 1 Fast-reading
Skim the text and do the following exercises. 1．This article may be from . A．an environmental magazine B．a diary C．a novel D．a story 答案 A
2．Find out the main idea of each paragraph.
Para.1 A．the cause of the earth’s becoming warmer Para.2 B．the consequence of burning fossil fuels Para.3 C．the increase of carbon dioxide Para.4 D．global warming will go on Para.5 E．puzzles about global warming
Para.6 F．different attitudes to global warming Para.7 G．an introduction to the passage
答案 Para.1：G Para.2：A Para.3：B Para.4：C Para.5：D Para.6：F Para.7：E Step 2 Careful-reading
Read the text carefully and choose the best answer.
1． made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997. A．Dr Janice Foster B．Charles Keeling C．George Hambley D．Sophie Armstrong 答案 B
2．Some scientists like George Hambley think that the temperature increase will .
A．cause a rise of several metres in the sea level
B．cause the spread of diseases and the disappearance of species C．encourage a greater range of animals
D．cause severe storms，floods，droughts and famines 答案 C
3．The main difference between Dr Janice Foster’s theory and George Hambley’s lies in .
A．how to prevent global warming B．what causes global warming
C．whether global warming would cause serious problems or not
D．whether the levels of carbon dioxide have increased or not over the years 答案 C
4．Which of the following is TRUE according to the text?
A．Greenhouse gases refer to some byproducts of the burning of fossil fuels. B．Global warming is a random rather than natural phenomenon.
C．The temperature in the last century increased by as high as 5 degrees. D．Fewer greenhouse gases will gather in the atmosphere. 答案 A
5．The author probably agrees that . A．actually global warming is good for man B．we should do nothing about 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 答案 D
Step 3 Post-reading
After reading the passage，please fill in the following blanks.
There is no doubt 1.that the earth is becoming warmer and that 2.it is human activity that has caused this global warming.
Many scientists like Dr Janice Foster believe that people have caused the increase in the earth’s temperature by 3.burning(burn) fossil fuels like coal，natural gas and oil to produce energy whose byproducts 4.are called(call) “greenhouse” gases，the most important one 5.being(be) carbon dioxide.These gases trap heat from the sun and therefore warm the earth，without 6.which the earth would be about thirty-three degrees Celsius 7.cooler(cool) than it is.But increased amount of extra carbon dioxide means that more heat energy is trapped in the atmosphere 8.causing(cause) the global temperature to go up.
9．On the other hand，scientists like George Hambley believe that any warming