Unit 4 Global Warming Period 1 reading
Learning aims: 1. Know well the global warming
2. Enable the students to talk about different sources of energy.
I mportant point: Learning about effect the global warming brings human being.
Difficult point: To improve the skills of reading.
使用说明及学法指导：1. 通过阅读课本P25-27，完成预习案。2. 完成时间：30分钟。
预习案 Previewing Case
Task 1 Divide the text into 4 parts and match the idea of each part.
Part 1(Para __) Two different attitudes among scientists towards global warming. Part 2 (Para __ to __) Whether people should do something about global warming or not. Part 3 (Para __to _) How global warming comes about.
Part 4 (Para __) Introduce a debate over the issue of global warming.
Task 2 Careful reading
Part 1 1) Who wrote the magazine article? What is the name of the magazine?
______________ _________________
Part 2 2) What are graph 1 about?______________________________________________________________
3) What is the reason of the increase in the earth’s temperature?
_________________________________________________________________________________________
4) What will happen if we add quantities of carbon dioxide into the atmosphere?
________________________________________________________________________________________
_
Part 3: List Charls Keeling’s, Dr. Janice Foster’s & George Hambley ‘s the ideas
Charls Keeling Dr. Janice Foster George Hambley
Graph2 shows that carbo n dioxide content of the atmosphere
5)_________
From 1957 to 1997. Carbon dioxide has caused the
global temperature to 6)
________. An increase of five
degrees would be a
7)_________ and could be
8)______________.
More carbon dioxide is a
9)__________ thing,
which makes crops 10)__________
more and will en-courage
11)______________________.
Task 4 语法填空
There is no doubt that the earth is becoming 1 ________(warm). But how has this come about and does it matter? People have fierce debates about whether 2 ______is human activity that has caused this global warming, 3 ___________ (compare) with most of the natural changes. Many scientists 4 _____Dr. Janice Foster believe that people have caused the increase in the earth’s temperature 5 ___ burning fossil fuels like coal, natural gas and oil to produce energy. Some byproducts of this process a re called “greenhouse” gases, the most important one of 6 ______is carbon dioxide. The in creased amount of carbon dioxide means that more heat energy 7 _________ (trap) in the atmosphere 8 ________ (cause) the global temperature to go up. On the other hand, some scientists predict that any warming will be mild with few bad 9 ____________(environment) consequences. Anyhow, even if we start reducing 10 ____ amount of
carbon dioxide and other greenhouse gases, the climate is going to keep on warming for decades or centuries.
我的疑惑
探究案 Exploring Case
探究一Read and choose the best answer
1. What’s the main idea of the article?
A. It talks about different ideas of global warming
B. It talks about the causes of global warming
C. It talks about the effects of global warming
D. all th e above
2. In Para. 5 , “but it could be as high as 5 degrees” here “it ” refers to _____
A. the data
B. the amount of global warming
C. the burning o f fossil fuels
D. the increased carbon dioxide
3.Which statement is FALSE? ________
A. During the 20th century, the temperature increased.
B. Natural gas is s a byproduct of burning fossil fuels
C. Between 1957 and 1997 Charls Keeling measured the amount of carbon dioxide in the atmosphere. \
D. Some scientists think if the amount of greenhouse gases continues to rise, we will face
a global catastrophe.
4.From the article, we can infer that ________
A. the earth has become warmer since early 20th century
B. the increased carbon dioxide is the only reason for global warming
C. some scientists think the sea level will rise as a result of global warming.
D. The issue of global warming will continue to be discussed.
探究二难句翻译
1. There is no doubt that the earth is becoming warmer and that i t is human activity that has caused this global warming rather than a random but natural phenomenon.
_________________________________________________________________________________________ _________________________________________________________________________________________ 2. All the scientists subscribe to the view that the increase in the earth’s temperature is due to the burning of fossil fuels like coal, natural gas and oil to produce energy
_________________________________________________________________________________________ _________________________________________________________________________________________ 3.Without the ‘greenhouse effect’, the earth would be about thirty-three degrees Celsius cooler than it is.
_________________________________________________________________________________________ 探究三 Discussion :What are the effects of global warming? Please list effects
negative
effect:____________________________________________________________________________
_________________________________________________________________________________________ positive
effect :____________________________________________________________________________
_________________________________________________________________________________________
训练案 Find these phrases in t he text
1 产生 _________________ 2毫无疑问_________________ 3 而不是 _________________
4赞同 _________________ 5 因为;由于 _________________ 6 少量的气体 _________________
7 大量的_______________8 容易被困_______________________________9 上升 _________________ 10 导致 _________________11 一方面…另一方面….___________________________
12 反对 _________________ 13 更大范围的动物 ____________________________
14 在大气中聚集____________________________15 持续变暖____________________________ 16 在未来的几十年和几个世纪内 ____________________________