高中英语Unit4第1课时reading学案新人教版选修6

Unit 4 Global Warmi ng Period 1 readi ng
Lear ning aims: 1. Know well the global warmi ng
2. En able the stude nts to talk about differe nt sources of en ergy.
I mportant point: Learning about effect the global warming brings human being.
Difficult point: To improve the skills of readi ng.
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 i nto 4 parts and match the idea of each part.
Part 1(Para __) Two differe nt attitudes among scie ntists towards global warmi ng.
Part 2 (Para __ to __) Whether people should do someth ing about global warmi ng or n ot.
Part 3 (Para __to _) How global warm ing comes about.
Part 4 (Para __) In troduce a debate over the issue of global warm ing.
Task 2 Careful readi ng
Part 1 1) Who wrote the magaz ine article? What is the n ame of the magaz ine?
Part 2 2) What are graph 1 about? _____________________________________________________________
3) What is the reas on of the in crease in the earth ' s temperature?
4) What will happe n if we add qua ntities of carb on dioxide into the atmosphere?
Task 3 True or False (Finish P27 Comprehending 2)
Task 4语法填空
There is no doubt that the earth is beco ming 1 ______ (warm). But how has this come about
and does it matter? People have fierce debates about whether 2 ______ i s huma n activity that
has caused this global warming, 3 _______________ (compare) with most of the natural changes. Many
scie ntists 4 ___ Dr. Janice Foster believe that people have caused the in crease 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
_____ i s carb on dioxide. The in -creased amount of carb on dioxide means that more heat en ergy
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
__________ (en vir onment) con seque nces. An yhow, eve n if we start reduc ing 10 amount of carb on dioxide
and other gree nhouse gases, the climate is going to keep on warm ing for decades or cen turies.
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 differe nt ideas of global warm ing
B. It talks about the causes of global
warmi ng
C. It talks about the effects of global warmi ng
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 warmi ng
C. the burning o f fossil fuels
D. the in creased carb on dioxide
3. Which stateme nt is FALSE? ______
A. During the 20th cen tury, the temperature in creased.
B. Natural gas is s a byproduct of burning fossil fuels
C. Betwee n 1957 and 1997 Charls Keeli ng measured the amount of carb on 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 cen tury
B. the in creased carb on dioxide is the only reas on for global warmi ng
C. some scie ntists thi nk the sea level will rise as a result of global warm ing.
D. The issue of global warm ing will con ti nue to be discussed.
探究二难句翻译
1. There is no doubt that the earth is beco ming warmer and that i t is huma n activity that
has caused this global warm ing rather tha n a ran dom but n atural phe nomenon.
2. All the scie ntists subscribe to the view that the in crease in the earth ' s temperature is due to the burning of fossil fuels like coal, n atural gas and oil to produce en ergy
3. Without the ‘ greenhouse effect ' , the earth would be about thirty-three degrees Celsius cooler tha n it is.
探究三Discussion :What are the effects of global warming? Please list effects
n egative
effect: __________________________________________________________________________ positive 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______________________
effect :
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_________________________________
3。