上外版（2020）选择性必修第三册Unit 4 Protecting the Environment Reading A 课件(共21张PPT)

(共21张PPT)
元封面
《 高 中 英 语 》 ( 上 外 版 )
选择性必修第三册第四单元
Protecting the Environment
授课教师：
课 时
授课内容
1
Getting Started/ Reading A
1
Reading A/ Vocabulary Focus
1
Reading A/ Grammar in Use
1.5
Listening, Viewing and Speaking
1
Reading B
0.5
Critical Thinking
1
Writing
1
Further Exploration/ Self-assessment
《 高 中 英 语 》 ( 上 外 版 )
选择性必修第三册第四单元
学习目标 Learning Objectives：
At the end of the lesson, you will be able to ...
1.通过略读、跳读等阅读策略，了解二氧化碳的大致信息；
get the general information about the carbon dioxide in the atmosphere by skimming and scanning ;
3.反思人类和温室效应的关系，并发表自己的观点。
become aware of the reflect upon the relationship between human and the greenhouse effect, and express the opinions.
2.分析全文和部分段落，理解因果链语篇模式；
figure out the causal chain pattern by analyzing the whole passage and some paragraphs ;
Pre-reading
Q1: What is the possible relationship between the two polar bears
Parent and kid (Mother and kid).
Q2: What might have separated them from each other
They might have been separated from by the melting ice.
Q1: What can you see in the picture Can you describe the picture briefly
The sea level is rising and it is splashing windows along the skyscrapers.
Carbon dioxide. The harmful effects of carbon dioxide and the causes of
these consequences.
a person or thing that is
morally bad or responsible for causing trouble or harm
Q2: Can you predict who is the “villain ” in the atmosphere
fall noisily onto a surface
against the
Q3:What do you expect to read in the passage from the title
villain
Pre-reading
While-reading
1 The villain in the atmosphere is carbon dioxide.
...
4 But here is what this apparently harmless and certainly essential gas is doing to us:
...
7 And all because of carbon dioxide. But how does that come about What is the connection
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Q1: There are some short paragraphs (e.g.Para 1, 4 and 7) in the text. What functions do they serve
Making the structure of the text clear and easy to follow.
Para.1 is the thesis of the text.
Para.4 tells the reader that what follows is the harmful effect of carbon dioxide.
Para.7 tells the reader that the next part is about the causes of these consequences.
Skim the passage and find out the functions of Para. 1, 4 and 7 and the organization of the passage.
While-reading
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Q2: What is the organization of the passage
carbon dioxide
Para 1
the causes
Para 7
the effects
Para 4
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Q1: Is the small quantity of carbon dioxide a villain
It does not seem to be a villain.
Q2: What functions does it serve
The small quantity of carbon dioxide in the air is essential to life. Plants absorb it and convert it into a necessity for all animal life.
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Read Para. 2-3 and learn the function of small quantity of carbon dioxide, and then complete the mind map.
（人、动植物细胞 的）组织
While-reading
2
tissue
3
no harm
the functions
carbon Para 2-3 a necessity for
dioxide animal life
the effects
Para 4
the causes
Para 7
Para 1
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Because the sea level is rising very slowly from year to year.
Q2: What's the result after many cities are drowned according to the passage
Much of the most productive farming land of the world will be lost and starvation will be widespread.
5 Q1: Why will Manhattan streets eventually be deep under water according to the author
Read Para.4-6, answer the teacher ’s questions based on the text and complete the mind map.
according to the way sth. appears
While-reading
apparently
4
6
the functions
Para 2-3
the effects
Para 4-6
the causes
Para 7 -11
the rising sea levels
the flooding of low-lying areas
a necessity for animal life
farming land lost
doing no harm
carbon
dioxide
Para 1
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辐射；放射线
infrared radiation
radiation less
heat
Read Para. 8 and complete the sentences corresponding to the diagram with one word for each blank.
sunlight
atmosphere
surface
While-reading
红外线的；使用红 外线的
infrared
radiation
Earth ’s
It is estimated that by 2020 the concentration will be about 0.0660
percent.
10 This means that in the coming decades...the glaciers will retreat and the polar ice caps will begin to melt.
11 It is the melting of the ice caps that is the worst change and it is this that demonstrates the villainy of carbon dioxide...If these ice caps begin to melt, the sea level will rise, with the result that I have already described.
7 And all because of carbon dioxide. But how does that come about What is the connection
8 It begins with sunlight...This is called the “greenhouse effect ” of carbon dioxide
9 We can be thankful that carbon dioxide is keeping us comfortably warm , but the concentration of carbon dioxide in the
atmosphere...it make up only 0.0316 percent of the atmosphere...
Read Para.7-11, and tick what has been mentioned and then complete the chain of cause and effect.
What does "make up" mean according to the underlined sentence
to move away or back
happen, occur
to form as a whole
While-reading
浓度，含量
ice caps
glaciers
10 This means that in the coming decades, the earth's average temperature will go up slightly. Winters will grow a bit milder on the average and summers a bit hotter. Little by little, the glaciers will retreat, and the polar ice caps will begin to melt.
Read Para.7-11 ,and tick what has been mentioned and then complete the chain of cause and effect.
冰川 冰盖
While-reading
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While-reading
√
√
√
√
a
f
e
h
Read Para.7-11, and tick what has been mentioned and then complete the chain of cause and effect.
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the functions
Para 2-3
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greenhouse increased the melting of ice
the effects
Para 4-6
the causes
Para 7-11
the rising sea levels
the flooding of low-lying areas
a necessity for animal life
farming land lost
doing no harm
e ec tempereture caps
carbon
dioxide
Para 1
ff t
- -
Post-reading
Summarise the passage according to the mind map of the text.
Checklist
□ Do you begin with a topic sentence that states the writer’s opinion clearly
□ Do you cover the writer’s main points
□ Do you use your own words
□ Do you use proper transitional words
□ Do you stick to original opinions
□ Do you limit the summary to 100 words
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1. What is the writer’s attitude to the villain in the atmosphere
Is he indifferent/ concerned/ delighted/ frightened
By referring to harmful effects on people’s daily life, the writer shows his deep concern about the condition of atmosphere.
2. What is the writer’s purpose in writing this passage
To entertain/warn/complain/inform …
Has the writer achieved his/her purpose
The aim of the passage is to make the public of the serious consequences of global warming. Yes.
Work in pairs and discuss the aim of the passage and the writer’s attitude to the villain in the atmosphere.
Post-reading
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Homework
1.Read aloud the passage three times. Pay attention to your intonation,
pronunciation and stress.
2.Build up a word bank related to the
functions, the harmful effects and the causes of these consequences about CO2 .
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Thank you！