人教版（2019）选修三Unit 3 Environmental Protection Reading and Thinking—Reading Comprehension 课件(共30张PPT)

(共30张PPT)
Unit 3
Environmental protection
Reading and Thinking—Reading Comprehension
读前 清障
Ⅰ.匹配单词
1.starve　　 A.to let sb/sth come out of a place where they have been kept or trapped
2.release 　 B.to give a document，proposal，etc.to sb in authority so that they
can study or consider it
3.sustain 　 C.to provide enough of what sb/sth needs in order to live or exist
4.trend 　　 D.to experience sth，especially a change or sth unpleasant
5.restrict 　 E.to suffer or die because you do not have enough food to eat
6.reform 　 F.to limit the size，amount or range of sth
7.undergo 　 G.to improve a system，an organization，a law，etc.by making
changes to it
8.submit 　 H.a general direction in which a situation is changing or developing
1.Tree roots have a tendency to buildings.
2.Heavy use of cellphones tends to distraction during work or study.
3.The scientist global warming at least three times in his presentation.
4.This alarming case showed how the increase in temperature __________
Earth’s ecology.
Ⅱ.选词填空
refer to，result in，along with，cause damage to，have an impact on
cause damage to
result in
referred to
had an
impact on
5.Mr Smith， his students，is working on the project day and night to finish the task ahead of time.
refer to，result in，along with，cause damage to，have an impact on
along with
返 回
精读 课文
Ⅰ.明文章大义
What does the text mainly tell us
A.Some polar bears died of starvation.
B.What the greenhouse effect is.
C.Global warming has caused some disasters and we must pay attention
　to it.
D.How polar bears find food.
√
Step 1　速读——整体理解文意
Ⅱ.悉层次结构
Match the main idea with each paragraph.
Part 1(Paras.1－2)　 A.The effects of the rise in temperature.
Part 2(Para.3) 　　 B.The causes of global warming.
Part 3(Para.4) 　　 C.The solutions to reducing greenhouse gas emissions.
Part 4(Para.5) 　　 D.The evidence of dramatic climate change.
Ⅰ.Read Paras.1－2 carefully and do the following exercises.
1.Which of the following is not a proof of a dramatic change in the global climate
A.A warming ocean and atmosphere.
B.Melting ice.
C.Rising sea levels.
D.A large population.
√
Step 2　细读——逐段获取细节
2.What does the case of the polar bear show
A.Food shortage becomes a major threat to creatures.
B.Human activities affect the survival of polar bears.
C.The increase in temperature has an effect on Earth’s ecology.
D.The hunting behaviour of mankind leads to the sharp decrease of animals.
√
3.Which of the following can replace the word“alarming”in paragraph 2
A.Scary. B.Worrying.
C.Awful. D.Troublesome.
√
Ⅱ.Read Para.3 carefully and do the following exercises.
1.What does the third paragraph mainly tell us
A.What the“greenhouse effect”means.
B.Why the global temperature rises quickly.
C.How the heat is released back into space.
D.Why the“man-made”greenhouse effect is important to us.
√
2.In the“natural”greenhouse effect，how is heat released back into space
A.In short wave form.
B.At longer wave lengths.
C.In the form of methane.
D.In the form of carbon dioxide.
√
3.What is the author’s attitude towards “greenhouse effect”？
A.It benefits humans.
B.It does harm to humans.
C.It has both good and bad sides.
D.Human beings should eliminate it.
√
Ⅲ.Read Para.4 carefully and do the following exercises.
1.Analyse the structure of this paragraph and fill in the chart.
The rise in temperature
led to
(1)_______________
extreme weather
examples
(2)_______________
natural disasters
extreme
(3)_________ and
(4)__________
rainstorms
heatwaves
results
not only (5)________
______________
but also (6)_______
___________
causing
serious damage
costing
human lives
2.Why did the author mention the climate scientists’ warning
The author mentioned the climate scientists’ warning because _______ ______________________________________________________________
________.
it is
essential that we take action and so it needs to be brought to everyone’s attention
Ⅳ.Read Para.5 carefully and do the following exercise.
Which of the following is not mentioned to deal with global warming
A.People do not use plastic bags in their daily life.
B.Governments make policies and take measures to reduce greenhouse
　gas emissions.
C.People change inappropriate lifestyles.
D.People educate others about global warming，along with its causes
　and impacts.
√
Ⅴ.Read the passage again and do the following exercises.
1.What is the genre of this passage
A.Prose(散文).
B.Narration.
C.Argumentation.
D.Exposition.
√
2.In which part of a newspaper or magazine may we find this passage
A.Entertainment.
B.Economy.
C.Education.
D.Environment.
√
3.What’s the author’s purpose of writing this text
A.To show us the bad effects of global warming.
B.To explain the meaning of“carbon footprint”.
C.To tell us to prevent disasters from happening.
D.To call on us to do our bit to protect our planet.
√
1.Do you think climate change is the result of human activity？Give your reasons.(Critical thinking)
Step 3　读后——讨论深度理解
答案　Yes，humans burn fossil fuels like coal，natural gas and oil to produce energy，along with some by-products called greenhouse gases like carbon dioxide，methane and water vapour，which trap heat from the sun and therefore warm the Earth.So，the growth of the greenhouse gas，carbon dioxide in the air actually comes as a result of things we do every day and the way we produce and use energy.
2.As a student，what should you do to deal with climate change (Creative thinking)
答案　I will try going to school by bike or on foot，reducing the “carbon emission”.
There is little doubt that Earth is getting warmer and warmer.In 2013，many people 1.　　　　　　　(shock) by a news photo of a dead polar bear which died of 2.　　　　　　(starve).Experts claimed that low sea-ice levels 3. (cause) by climate change meant the bear could not hunt seals as before，so it had to travel greater distances to find food.Then what is causing the increase in the global average surface temperature？Climate scientists often mention a key climate process called the“greenhouse effect”，4. has two common meanings：
Step 4　总结——课文语法填空
were shocked
starvation
caused
which
the“natural”greenhouse effect and the“man-made”greenhouse effect.The“man-made”greenhouse effect has now become 5. big problem.There is strong and comprehensive evidence 6. the rise in temperature has led to an increase in extreme weather and natural disasters worldwide.In fact，news reports are 7. (frequent) broadcast about extreme rainstorms and heatwaves causing deaths and economic losses.Continued greenhouse gas emissions will result in further warming and long-lasting changes to the 8. (globe) climate.This requires the attention of people all over the world.
a
that
frequently
global
We as individuals can reduce our “carbon footprint” by 9.___________(restrict) the amount of carbon dioxide our lifestyles produce.It is our responsibility 10. (seize) every opportunity to educate everyone about global warming，along with its causes and impacts.
restricting
to seize
1.An expert who has studied polar bears for many years said that from the position of its dead body，the bear appeared to have starved and died.
[句式分析]　该句为 句。who引导 从句，在从句中作______，指人；that引导 从句。
[自主翻译]　___________________________________________________
______________________________________________________________
Step 5　解读——长句难句分析
复合
限制性定语
主语
宾语
一位研究北极熊多年的专家说，从尸体的位置看，这只北极熊像是饿死的。
2.Climate scientists often mention a key climate process called the “greenhouse effect”，which has two common meanings: the “natural” greenhouse effect and the “man-made” greenhouse effect.
[句式分析]　该句为 句。called the “greenhouse effect”为过去分词短语作 ；which引导 从句，在从句中作 。
[自主翻译]　___________________________________________________
______________________________________________________________
复合
后置定语
非限制性定语
主语
气候科学家常常会提到一个关键的气候过程——“温室效应”；它有两个常见的含义：“天然”温室效应和“人造”温室效应。
3.There is strong and comprehensive evidence that the rise in temperature has led to an increase in extreme weather and natural disasters worldwide，not only causing serious damage，but also costing human lives.
[句式分析]　该句为 句。that引导的是 从句，解释说明evidence的具体内容；not only...but also...意思是“ ”，连接两个并列成分，此处连接两个现在分词短语，在句中作 状语。
[自主翻译]　___________________________________________________
______________________________________________________________
复合
同位语
不但……而且……
结果
确凿、全面的证据表明，温度上升导致全球极端天气和自然灾害增多，不仅造成严重破坏，而且使人丧命。
4.Climate scientists have warned that if we do not take appropriate actions，this warming trend will probably continue and there will be a higher price to pay.
[句式分析]　此句为 句。that 引导的是 从句，该从句中又包含了由if引导的 从句，take appropriate actions意思是“_____
___________”。
[自主翻译]　___________________________________________________
______________________________________________________________
复合
宾语
条件状语
采取
适当的行动
气候学家已发出警告：如果我们不采取适当的行动，这种变暖的趋势可能会持续下去，而我们将为此付出更大的代价。
5.It is our responsibility to seize every opportunity to educate everyone about global warming，along with its causes and impacts，because this is the most serious issue affecting all of us on this planet.
[句式分析]　此句为 句。It为 ，真正的主语是 ；because引导 从句，affecting all of us on this planet为现在分词短语作 。
[自主翻译]　___________________________________________________
______________________________________________________________
返 回
复合
形式主语
动词不定式
原因状语
后置定语
我们有责任抓住每一个机会，教育每个人了解全球变暖，包括其成因和影响，因为这是影响这个星球上我们所有人的最严重的问题。