科普仁爱英语九上Unit 2 Topic2 All these problems are very serious Section C课件33张

课件33张PPT。 Unit 2 Saving the Earth Topic 2 All these problems are very serious
Section CEnvironmental problems on our planetGlobal WarmingForest plummeted森林锐减 Air pollution 　 Land Desertification土地荒漠化?water pollutionOcean pollution海洋污染 The environment is becoming worse and worse. What can we do to protect our environment ? Give a speechWe should…We shouldn’t…
Learn Aims（学习目标）：
Words and phrases：hole, form,rise… take away, ozone layer…
学会使用笔记来获取文章的主要信息以及将信息整理归类
学习并利用阅读技能：预测、获取大意、猜测词义 carbon dioxide/?kɑ:b?n da???ksa?d/ oxygen 氧气/ '?k s? d??n/CO2二氧化碳O2氧气Pre-readingSome trees’ functionsTrees can breathe in__________________
and breathe out_________________.
carbon dioxide(CO2)oxygen(O2)吸入呼出Pre-reading /?: / 形成 /?bl??k?t/ 毯子 /??ske?p/ 逃离、渗出It has formed a blanket and the heat (热气）
from the sun can’t escape.The temperature is rising.rise /?ra?z/ 上升But Carbon dioxide has increased(增加) a lot.a special kind of oxygen called “ozone ” (O3)

(被叫做）Pre-readingO3/ ??? z??n /ozone 臭氧ozone layer臭氧层/ ??? z??n ?lei ? /hole / h??l / 洞 a very big hole in the ozone layer（臭氧层）
There is too much harmful radiation from the sun/?re? d??e? ? n /放射物read again/ h??l / 洞
/f?:m / 形成
/ra?z/ 上升 holeformriseblanket 毯子
carbon dioxide 二氧化碳
ozone 臭氧
radiation 放射物fewer treesfactory pollutiontraffic pollutionthe ozone holemore carbon dioxideCan you match(匹配） them?Look at the following pictures and predict the main idea of the passagepredict12345预测Skimming (1b-1 P40)1.Choose suitable titles for Paragraphs 2-6. Then write it down in front of each paragraph.
A.Traffic pollution
B. Factory pollution
C. Fewer trees
D.The ozone hole
E. More carbon dioxideSkimmingChoose suitable titles for Paragraphs 2-6. Then write it down in front of each paragraph. _________ 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. C. Fewer TreesParagraph 2take away
拿走、带走 _________ In big cities, cars and buses have polluted the air. Now many people in cities have health problems.
Skimming : the suitable title (正确标题）Paragraph3A. Traffic PollutionParagraph 4B. Factory PollutionSkimming : the suitable title (正确标题）Skimming : the suitable title (正确标题）Paragraph 5D.The Ozone holeSkimming : the suitable title (正确标题）Paragraph 6E.More Carbon DioxideScanning (1b 2-5 P40)
1b Read 1a and complete the following
tasks(1b 2-5) . 2.What does our planet mean here?
A. The sun. B. Mars.
C. The moon. D. The earth.?原文：But during this period, we have changed our planet a lot in many ways. Some things we have done are good for our earth while others are bad.Scanning :1b Read 1a and complete the following tasks. 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 worldrefer to 涉及、提到?4.The word it in Paragraph5 refers to ____.
A. CO2 B. O3 C. O2 D. H2O1b Read 1a and complete the following tasks. Scanning : ?原文：There is a kind of oxygen called “ozone”. It is important .But now air pollution is destroying it and making a very big hole in the ozone layer.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 1b Read 1a and complete the following tasks. Scanning : ?Write down only the key words when taking notes. 1C:Read again and complete the notes according to 1a. careful reading Task 1: health problemspollute land and water, be deadharmful radiation reaches the earth, cause cancer factory pollution the ozone hole more CO2the level of oceans 海平面cause sth / sb to do sth greenhouse effect(温室效应）,
level of oceans rising, climate changefewer trees forests become deserts, animals and
plants disappeartraffic pollution Careful reading:Task 2: Useful expressions:take away
as a result
be dead
make a big hole
pass through the hole
cause sb sth to do sth
refer to结果拿走、带走打了个洞死气沉沉导致….做…穿过洞提及、涉及3. As a result, many rivers and lakes are dead.
4.The harmful radiation passes through the
hole .
5. This is called “the greenhouse effect”.
6. It causes the level of the oceans to rise and the climate of the earth to change.2. The earth is taken away.(翻译、举例)Tasks(翻译举例)(翻译、举例)(翻译)(翻译、举例)1. Some things we have done are very good for
the earth while other are bad.(翻译)The earth is taken away.

take away:
Eg:难道你要拿走他们的铅笔吗？
Are you goingt to their pencils?泥土被带走take away 拿走、带走As a result, many rivers and lakes are dead.结果，许多河流和湖泊都死了,没有活的生物。1. As a result：因此，结果 Eg: 因此，他们会非常具有说服力。
, they can be very persuasive.As a result2. be dead死气沉沉有害辐射穿过这个洞The harmful radiation passes through the hole .pass through the hole穿过洞pass through 穿过空气可以通过潮湿的布料。
Air will the wet cloth.pass through It causes the level of the oceans to rise and the climate of the earth to change.它导致了海平面的上升以及地球气温的变化1. the level of the oceans 海平面2.cause:造成”、“使(发生)Smoking may cause lung cancer. 吸烟可导致肺癌。 The bad news caused her to be sad. 这个坏消息使她伤心。cause…to do…Cause sth.:1. _________, many rivers and lakes ________.
2.The harmful radiation______________ the hole .
3.It _________the level of oceans ___________.
4. The earth ______________ (泥土被带走）. Practice: Fill in the blanks As a result are deadpasses throughcausesto riseis taken awayWe 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.
SummaryHomework:
Read 1a after class；
2.Memorize the useful expressions and key words which we learn today.
3. Write a passage which we discuss in classThank you