Unit 4 Global warming
Period 1 Warming Up ，Pre －reading ，Reading
Learning aims ：
1.Get students to know about global warming and its effect ；
2. To enable the students to realize what we can do about global warming.
Learning important points
To enable the students to learn about global warming and to develop their reading ability.
Learning difficult point
To enable the students to talk about what we should do to prevent global warming.
Before class （课前自主学习）
I.重点单词
1._________v.消费；消耗；耗尽
2. _________v.趋向；易于；照顾
3_________n.大灾难；浩劫 4._________adj.胡乱的；任意的
5. _________v.反对；反抗；与(某人)较量 6_________.n.洪水；水灾
7. _________v.同意；捐赠；订阅 8. _________ n.燃料
9._________ n.量；数量 10. _________ n.图表；坐标图；曲线图
11. _________ v.陈述；说明 12. _________ n.结果；后果；影响
13._________ n.资料；数据 14._________ v.看一下；扫视
II.重点短语
1. come about _________
2.keep on_________
3. subscribe to _________
4. be opposed to _________
5. _________ 大量的
6.________即使_
7. _________ 上升；增长；升起 8 _________依靠，依赖
9 _________ 温室效应 10. _________用光，耗尽
In class （课上合作探究）
Learning procedures
Step 1 Warming up
1．Warming up by reading and talking ：
Read through the exercise. Put students in groups to talk about what we use energy
for ，discuss what are the sources of these energy and whether the following sources are
renewable or non －renewable.
___________ ___________ ___________ ___________ __________ __________Things that use energy
Sources of energy Renewable/non －renewable coal oil natural gas wind power solar energy nuclear energy lights
heating
television
cassette player
video recorder
computer
fridge
stove
hydro －electric
power biomass energy
geothermal energy
hairdryer
...tidal energy
Step 2 Pre －reading
1．Look at the picture of a greenhouse and ask students what a greenhouse is made of and what its purpose is.
2．Ask students what they think “greenhouse gases” are and what they think greenhouse gases do. Look at the picture above and explain it to their partners.Step 3 Reading and comprehending
Task 1．Skimming
Ask students to read the passage quickly so as to get the key words and general idea of each
paragraph and answer the following questions ：(1)What is the main topic of the article?
________________________________________________________________________(2)Who wrote the magazine article ？What is the name of the magazine?
________________________________________________________________________
(3)What are the names of the three scientists mentioned in the article ？Do they agree with one another?
________________________________________________________________________
(4). What do they think about global warming? Do they agree with one another?
________________________________________________________________________
(5). What are the two graphs about?
________________________________________________________________________
Task 2.Scanning
Choose the best answers to each question according to the text
(1).How much did the temperature rise in the 1900s?
A. One degree Fahrenheit.
B. One Celsius
C. Two degrees
D. Thirty degree Celsius
(2).What causes the temperature of the earth to increase?
A. Cutting trees
B. Wasting the farmland
C. Running out of the river water
D. Burning fossil fuels
(3).Who accurately measured the amount of carbon dioxide in the atmosphere from 1957 to 1997?
A. Dr. Janice Foster.
B. Fahrenheit.
C. Charles Keeling
D. George Hambley
(4). George Hambley believes that more carbon dioxide is actually_____.
A. a bad thing
B. a dangerous thing.
C. a comparative thing
D. a positive thing
(5).What is the main idea of this passage?
A. Global warming.
B. Flood phenomenon.
C. Making methane.
D. Making greenhouses Task 3．Careful reading
Read the passage carefully and judge whether the statements are true(T) or false(F)．
①Janice Foster believes that global warming is caused by the burning fossil fuels.( )
②Natural gas is a greenhouse gas.( )
③Carbon dioxide is a byproduct of burning fossil fuels.( )
④People accept Charles Keeling's data because he took accurate measurements.( )
⑤Flooding could be one of the effects of future global warming.( )
