上外版（2020）选择性必修第三册Unit 4 Protecting the Environment：Reading A 课件（共27张PPT）

(共27张PPT)
《 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
build up a web of the top-related words and expressions and learn to
apply them;
3.能运用本单元所学的主题语境相关词和习惯搭配讨论有关 全球变暖对人类生活的影响，并有逻辑地解释它的起因。
conduct a discussion by using the topic-related words and expressions learnt in the text and explain possible causes in a logical way.
学习目标 Learning Objectives：
At the end of the lesson, you will be able to ...
1.能在语境中学习和运用课文核心词汇和常用词组；
further understand the text and learn the target words while analysing functions, effects and causes of carbon dioxide through some questions based on the text;
2.能列举并运用与本单元主题语境相关的动词、名词及其习惯搭 配和表达；
What is the theme of the text
The writer describes the functions of small quality of
carbon dioxide, harmful effects of carbon dioxide, and the causes of these consequences to make the public aware
of the serious results of global warming.
Review the main idea and organization of Reading A.
What is the organization of the text
Can you identity the connector that links the two functions of
carbon dioxide in Para. 2-3
What ’s more.
1) what’s more
to add more information that emphasizes what you are saying 更为甚者；更为重要的是
Review and analyse the functions of small quantity of carbon dioxide in Para. 2-3.
空气中少量的二氧化碳对我们没有害处，更为重要的 是它对生命很重要。(what’s more)
A small quality of carbon dioxide in the air does us no harm , and what’s more it is essential to life.
Review and analyse the functions of small quantity of carbon dioxide in Para. 2-3.
2) absorb / b s :b / vt.
to take in liquid, gas, or another substance from the surface or space around something 吸收（液体、气体等）
absorb heat/carbon dioxide/water/knowledge
sb. be absorbed in one’s work
absorption / b s p n / noun
absorbent / b s b nt / adjective
Review and analyse the functions of small quantity of carbon dioxide in Para. 2-3.
Choose the word and phrases mentioned above and fill in
the blanks in proper forms.
1.The scientists are absorbed in their work on plants’ absorption of carbon dioxide.
2. To sell recognized that these qualities might make it useful as an absorbent material for removing carbon dioxide.
Review and analyse the functions of small quantity of carbon dioxide in Para. 2-3.
Could you list the words and expressons related to the
function of CO2 in Para. 2-3
be converted into their own tissue
do no harm
be absorbed by plants release oxygen
Review and analyse the functions of small quantity of carbon dioxide in Para. 2-3.
serve as the basic food
functions
The sea level is rising very slowly and in all it will
continue to rise and do so at a greater rate in the course of the next hundred years.
Why is this apparently harmless and certainly essential gas
harmful to us
Review and analyse the harmful effects of CO2 in Para. 4-6.
3) likelihood / la klih d/
n. the chance of sth happening; how likely sth is to happen 可能；可能性
adj. & adv. likely
sb./sth. be likely to do sth.
It ’s likely that...
Review and analyse the harmful effects of CO2 in Para. 4-6.
e.g. In all likelihood, the sea level will continue to rise and do so at a greater rate in the course of the next hundred years.
The sea level will be likely to continue to rise and do so at a greater rate in the course of the next hundred years.
It's likely that the sea level will continue to rise and do so at a
___________
greater rate in the course of the next hundred years.
Review and analyse the harmful effects of CO2 in Para. 4-6.
随着海平面的每年上升，许多城市很可能被淹没，引起了世界上很多耕地丢失。
As the sea level is rising from year to year, in all likelihood , many cities will be
drowned, causing much of the most farming land of the world to be lost.
As the sea level is rising from year to year, many cities are likely to be drowned,
causing much of the most farming land of the world to be lost.
As the sea level is rising from year to year, it’s likely that many cities will be
drowned , causing much of the most farming land of the world to be lost.
Review and analyse the harmful effects of CO2 in Para. 4-6.
widespread
food supply drops
effects
farming land will be lost
many cities will be drowned
sea level is rising
it continues to rise at a
greater rate in all likelihood
the sea is splashing against
the windows
Could you list the words and expressions related to the harmful effects of CO2 in Para. 4-6
Review and analyse the harmful effects of CO2 in Para. 4-6.
starvation will be
What does the greenhouse effect mean
It means an increase in the concentration of carbon dioxide in the atmosphere that leads to an increase in the plantet’s average
temperature.
4)concentration / k ns n tre n /
n. the amount of a substance contained in a liquid or in another substance 浓度；含量
n. the ability to direct all your effort and attention on one thing, without thinking of other things 专心；专注
Review and analyse the causes of consequences of CO2 in Para.7-11.
vt. concentrate 集中于；专注
concentrate one’s efforts/attention/energy/mind etc on something 全神贯注于；集中于
在这节课上, 生物老师将着重讲温室效应是怎样形成的。(concentrate)
Review and analyse the causes of consequences of CO2 in Para.7-11.
In this class, the biology class shall concentrate (his attention) on how the greenhouse effect comes about.
随着温室气体浓度的下降，地球开始再次变冷，最终又将回到冰河时代。 ( concentration )
Gradually as the concentration of greenhouse gases goes down , Earth starts to cool again, and eventually you slip back into an Ice Age.
Human beings need powers of concentration to stop the
concentration of carbon dioxide from moving upwards to avoid the greenhouse effect.（英译中）
为了避免温室效应，人类必须集中精力阻止二氧化碳的浓度上升。
Review and analyse the causes of consequences of CO2 in Para.7-11.
What is it that demonstrates the villainy of carbon dioxide
It is the melting of the ice caps that demonstrates the villainy of
carbon dioxide.
5) demonstrate / dem nstre t /
v. to show sth clearly by giving proof or evidence
证明；证实；论证；说明
sth (to sb)
that /how/what/why etc
n. demonstration
Review and analyse the causes of consequences of CO2 in Para.7-11.
~
~
这些结果有力地证明， 空气中的坏人是二氧化碳。
(demonstrate)
These results demonstrate convincingly that the villain in the
atmosphere is carbon dioxide.
冰盖的融化清楚的说明了全球的气候变暖 。 (demonstration)
The melting of the ice caps is _ _
Review and analyse the causes of consequences of CO2 in Para.7-11.
Could you list the words and expressions related to the causes of
these consequences in Para.7-11
demonstrate the villainy of CO2
the glaciers will retreat, the begin with sunlight
make up only 0.0316 percent
the villainy comes in
Review and analyse the causes of consequences of CO2 in Para.7-11.
infrared radiation
Polar ice caps will melt
causes
concentration of CO2 goes up steadily
radiate heat in the form of
The Villain in the Atmosphere 1. Functions of carbon dioxide 2. Harmful effects of carbon dioxide
3. Causes of these
consequences
do no harm, be absorbed by plants, release oxygen, serve as the basic food, be converted into their own tissue ... sea level is rising, in all likelihood, it continues to rise at a greater rate, splash against the windows, many cities will be drowned, farming land will be lost, food supply drops, starvation will be widespread ...
begin with sunlight,
radiate heat in the form of
infrared radiation,
concentration of CO2 goes up , the villainy comes in,
make up only 0.0316 percent the glaciers will retreat,
the Polar ice caps will melt, demonstrate the villainy of
CO2...
List the topic-related words and expressions.
A: Do you know anything about carbon dioxide
B: Carbon dioxide is a gas. We breathe in oxygen and breathe out carbon dioxide. And plants 1 absorb carbon dioxide.
A: So carbon dioxide is not really harmful
B: Well, carbon dioxide itself does not 2 do harm to the environment, but the 3 concentration of it in the atmosphere causes the “greenhouse effect. ”
A: What is the “greenhouse effect ”
B: It is the process by which radiation from the sun is blocked by the greenhouse
gases and not reflected back into space. The 4 atmosphere retains more heat
than necessary.
A: How does that 5 come about
Fill in the blanks with the appropriate forms of the given words and expressions to complete the dialogue. Note that there are two more options than you need.
widespread atmosphere estimate quantity
release
do harm to at a rate of come about absorb
concentration
B: In the last few centuries, coal, oil and natural gas have been burned for energy at a rapidly increasing rate. The carbon contained in these fuels is being 6released in the form of carbon dioxide and poured into the atmosphere.
A: And the forests, once 7 widespread, have been disappearing rapidly in the last
couple of centuries.
B: Exactly. It is 8 estimated that tropical forests are now disappearing 9 at a rate of about 13 million hectares per year.
A: I see. The burning of fuel adds more carbon dioxide to the atmosphere, and as the forests disappear, less carbon dioxide is being removed by plants.
B: As a result, the 10 quantity of the carbon dioxide in the atmosphere is going up year by year.
Fill in the blanks with the appropriate forms of the given words and expressions to complete the dialogue. Note that there are two more options than you need.
widespread atmosphere estimate quantity
release
do harm to at a rate of come about absorb
concentration
What aspects of your daily life have been affected by the
global warming
Requirements:
a. introduce the effects of the global warming.
b. explain possible causes in a logical way.
c. use as many words and expressions learnt in the text as possible.
Group discussion
1. Complete Ex II on P55-P56;
2. Write a short passage (at least 100 words) on “what aspects of your daily life have been affected by the global warming ”
Requirements:
a. introduce the effects of the global warming.
b. explain possible causes in a logical way.
c. use as many words and expressions learnt in the text as possible.
Homework
Thank you！