(共33张PPT)
2019-2020仁爱科普英语九上Unit 2 Saving the Earth
Topic 2 All these problems are very serious.
Section C
教学目标：
1. 掌握四会词汇和句型。
2. 进一步学习各种污染对地球造成的危害和造成这些污染的原因。
3. 能根据不同的阅读的目的，运用简单的阅读策略获取信息。
take away 拿走
oxygen n.氧气 [??ks?d?(?)n]
hole n.洞,坑 [h??l]
ozone layer 臭氧层
radiation n.放射，放射物 [re?d??e??(?)n]
new words
directly adv.直接地 [d?'rektli]
carbon dioxide 二氧化碳
blanket n.毛毯，毯子 [?bl??k?t]
escape n.&v.逃跑；逃脱 (from) [?'ske?p]
raise v.上升，上涨 [[ra?z]]
the greenhouse effect 温室效应
refer 提到，涉及，有关 [r??f??]
(1)________ of us knows how to stop the bad behavior.
(2) I knocked on the door but ___________ answered.
(3) Some of these books are better than__________.
(4) She was driving the car with one hand and wiping the window with the _______.
(5) They are beautiful but I am looking for ___________ useful.
(6) Is there ___________ you can do to help her?
(7) There’re 5 000 people living here and almost _________has his/her own car.
(8) He’s cleverer than ____________ I know.
(9) I’ve looked __________ but I can’t find it.
Fill in the blanks using something, anything, others, nobody, everyone, anybody, everywhere, none, other.
None
nobody
others
other
something
anything
everyone
anybody
everywhere
Review
What can we do to protect our environment ?
Give a speech
In our daily life, we should face more environmental problems.
Can you say something about them?
cities, pollute,
health problems
factories, the land and the air, dead
Lead in
In our daily life, we should face more environmental problems.
Can you say something about them?
cut down, millions of,
take away the earth,
become desert
拿走
In our daily life, we should face more environmental problems.
Can you say something about them?
oxygen
a special kind of oxygen
called “ozone” (O3)
氧气
a very big hole in the ozone layer,
too much harmful radiation from the sun
臭氧层
放射，放射物
n.洞，坑
v.出现，形成
n.种类，形式
In our daily life, we should face more environmental problems.
Can you say something about them?
CO2 carbon dioxide increase a lot, form a “blanket”, the heat from the sun can’t escape
二氧化碳
毛毯，毯子
渗出；逃跑；逃脱
cause the level of the sea to rise
called “the greenhouse effect”
or “global warming”
v.上升；起床；升起
温室效应
fewer trees
factory pollution
traffic pollution
the ozone layer
more carbon dioxide
Can you match them?
1a Read and understand.
Look at the following pictures and predict the main idea of the passage.
Choose suitable titles for Paragraphs 2-6. Then write it down in front of each paragraph.
The earth is 4.6 billion years old. We humans have lived on the earth for only 35 000 years, but during this period, we have changed our planet a lot in many ways. Some things we’ve done are very good for the earth while some are bad.
_________ All over the world, people have cut down millions of trees. When it rains or when the wind blows, the earth is taken away. Forests have become deserts, so many kinds of animals and plants are disappearing.
Fewer Trees
A. Traffic pollution B. Factory pollution C. Fewer trees D. The ozone hole E. More carbon dioxide
____________ In big cities, cars and buses have polluted the air. Now many people in cities have health problems.
_____________Factories have also polluted the land and the water. As a result, many rivers and lakes are now dead.
_____________ Around the earth, there’s a special kind of oxygen called “ozone”(O3). It is important to the earth. But now air pollution is destroying it and making a very big hole in the ozone layer. Too much harmful radiation from the sun passes through the hole and reaches the earth directly. This is very dangerous because this kind of radiation can cause cancer.
Traffic Pollution
Factory Pollution
The Ozone Layer
直接地
________________ Carbon dioxide (CO2) in the air has increased a lot. It mainly comes from burning oil, coal and wood. This has formed a blanket around the earth. The heat from the sun can’t escape so the temperature is rising. This is called “the greenhouse effect”. It causes the level of the oceans to rise and the climate of the earth to change.
All these problems are very serious, so we must do something now.
More Carbon Dioxide
1b Read 1a and complete the following tasks.
2.What does our planet mean here?
A. The sun. B. Mars.
C. The moon. D. The earth.
3.In the passage, blanket refers to ____.
A. carbon dioxide around the earth
B. the ozone layer in the sky
C. the forests around the world
D. pollution all over the world
4.The word it in Paragraph5 refers to ____.
A. CO2 B. O3 C. O2 D. H2O
5. What is the best title for this passage ?
Environment Problems B. Pollution on the Earth
C. Hope for the Future D. The Greenhouse Effect
1a Read and understand.
Write down only the key words when taking notes.
1c Complete the notes according to 1a.
Problem Effect on the environment
fewer trees forests become deserts, animals and plants disappear
traffic pollution
greenhouse effect, level of oceans rising, climate change
Retell it
cars and buses pollute air, health problems
pollute land and water, rivers and lakes dead
harmful radiation reaches the earth, cause cancer
factory pollution
ozone hole
more CO2
2 Surf the Internet to collect more information about environmental problems and effects. Then discuss the information in groups and take notes.
3. Combine the key points in 1c and 2 to form a short passage and pay attention to the proper linking words.
As we all know, water pollution is becoming more and more serious. Some factories pour waste water into the rivers. As a result, it makes the water dirty and smell terrible. Most of fish in the water have died and we can’t swim in the water. Water is very important to human beings, so we should do our best to protect and save it. Luckily, our government is taking measures to protect the water from pollution.
You can write it like this:
本题考查形容词修饰不定代词的用法以及句意理解。形容词修饰不定代词时,形容词要后置,先排除A;结合题干中的"为什么不去乡村野餐呢"可推断,城市里没有什么有趣的事,故nothing interesting符合题意。
1.(2017长沙)( )—There's in the city.Why not have a picnic in the countryside??
—Great.West Hill might be a good choice.
A. interesting something B. nothing interestingC. anything interesting
【答案】B
【解析】
Exercise
中考链接
2（2019安徽）( )Could you stay a little longer? I have ____ more to tell you about the plan for tomorrow.
A. something B. everything C. anything D. nothing
【答案】A
【解析】
句意：你能多待一会儿吗？关于明天的计划我还有更多的事要告诉你。something某事；everything每件事；anything任何事；nothing没什么事。根据句意可知B和D不对；something用于肯定句；anything用于否定句。这是一个肯定句，故应选A。
3.（2019江苏宿迁）( )As the lights in the room went out, it was very dark and ___________could be seen clearly.
A. something B. anything C. everything D. nothing
【答案】D
【解析】
【详解】句意：房间里的灯灭了，天很黑，什么也看不清。考查不定代词辨析。nothing没有东西，表否定；anything任何东西，用于否定句、疑问句；something某物，表示不确定；everything每件东西。根据it was very dark可知什么也看不清，故选D。
4.( 2019年江苏无锡)( )If something is wrong, fix it if you can. Do not worry. Worry never fixes ________
A. something B. everything C. anything D. nothing
【答案】C
【解析】句意：如果出了什么问题，如果可以的话，把它解决好。别担心。忧虑永远不会解决任何问题。A. something某事；某物；B. everything每件事；C. anything任何事物；D. nothing没有什么。anything一般用于否定句和疑问句中；something则用在肯定句中；everything以单数形式表达所有的概念；nothing则表示什么都没有。因为句中有never，可知，本题是否定句，因此应该选择anything任何事物；符合语境：忧虑永远不会解决任何问题。故选C。
.用something,anything或nothing填空。
1.I think there is wrong with my watch.It doesn’t work.?
2.There is to eat in the refrigerator.Could you please buy some food??
3.Is there else I can do??
【答案】 1.something 2.nothing 3.anything
【解析】 something “某些事物”,常用于肯定句;anything “任何事物”,常用于否定句或一般疑问句;nothing “没有事情”,除句首作主语外,其余可用not...anything 代替。
We learn: 1. Some words: hole, form, rise
2. Some phrases: take away,
refer to
3. Some sentences:
All these problems are very serious, so we
must do something now.
We can: 1. Talk about the harm of pollution.
2. Combine the key points to form a
short passage.
Summary
1.Read 1a.
2.Memorize the useful expressions and key words which we learn today.
3.Finish Section C in your workbook.
4.Review Section A-C and preview Section D.
Assignment
Thank you
谢谢
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2019-2020仁爱科普英语九年级上
Unit2topic2sectionC导学案
教学目标：
1. 掌握四会词汇和句型。
2. 进一步学习各种污染对地球造成的危害和造成这些污染的原因。
3. 能根据不同的阅读的目的，运用简单的阅读策略获取信息。
教学重点: 能根据不同的阅读的目的，运用简单的阅读策
略获取信息。
教学难点：学生在阅读文章的基础上，收集、整理素材、组织语言进行简单的仿写。
一单词填一填
1. As a m_____ of fact, she didn’t know the thing at all.
2. China has developed a lot because of our country’s one-child p_____.
3. As we know, _____ (无一人) of us likes pollution.
4.Look! The factory is pouring (废弃的) water into the river.
5. .Loud noises can cause high _____ (血) pressure as well.
二选择选一选
1.Our country _____great progress in science and culture in recent years.
A. makes B. has made C. made D. make
2.—We really shouldn’t use plastic bags any more when shopping.
—_____ It’s important to protect our environment.
A. So do I. B. With pleasure.
C. That’s OK. D. So it is.
3. I think it’s good _____ us _____ eat healthy food.
A. for; to B. for; for C. to; for D. to; to
4. The supermarket provides customers _____ plastic bags for free.
A. on B. with C. of D. in
5. We must plant more trees after we _____ every year.
A. cut off them B. cut them off
C. cut down them D. cut them down
三重点攻一攻。
1树可以阻止风把土壤吹走。
____________________________________________________________.
2我们不应该到处扔垃圾。你可以这么说：
____________________________________________________________.
3. 所有的问题都很严重，所以我们现在必须要做些什么了。你可以这么说：
____________________________________________________________.
4你想号召大家尽自己所能来保护环境，你可以这么说：
__________________________________________________________.
5. 你想号召大家关心野生动物，多种树， 你可以这么说：
____________________________________________________________.
四．还原题
The earth is 4.6 billion years old. We humans have lived on the earth for only 35 000 years, but during this period, we have changed our planet a lot in many ways. 1
All over the world, people have cut down millions of trees. 2 Forests have become deserts, so many kinds of animals and plants are disappearing.
Factories have also polluted the land and the water. 3
Around the earth, there’s a special kind of oxygen called “ozone”(O3). 4 But now air pollution is destroying it and making a very big hole in the ozone layer.
5 It mainly comes from burning oil, coal and wood. This has formed a blanket around the earth. The heat from the sun can’t escape so the temperature is rising. It causes the level of the oceans to rise and the climate of the earth to change.
All these problems are very serious, so we must do something now.
阅读上面短文，把A-E五个句子填入文中空缺处，使短文内容完整、正确。
A. As a result, many rivers and lakes are now dead. B. Carbon dioxide in the air has increased a lot. C. Some things we have done are very good for the earth while others are bad. D. When it rains or when the wind blows, the earth is taken away. E. It is important to the earth.
参考答案
一单词填一填
1. matter 2. policy 3 . none 4. waste 5. blood
二选择选一选
B D A B D
三重点攻一攻。
1.We shouldn’t leave rubbish here and there.
2.Trees can stop the wind from blowing the earth away.
3. All these problems are very serious, so we must do something now.
4.We should do everything we can to protect the environment.
5.We should care for wild animals and plant more trees.
四．还原题
CDAEB
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