(共29张PPT)
Unit 2 Topic 2
All these problems are very serious.
Section C
Learning objectives
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.
4. Talk about the harm of pollution.
5. Combine the key points to form a short passage.
Review
What’s it about
(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.
Fill in the blanks using something, anything, others, nobody, everyone, anybody, everywhere, none, other.
None
nobody
others
other
something
Review
What’s it about
(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.
anything
everyone
anybody
everywhere
Free talk
In our daily life, we should face more environmental problems.
Can you say something about them
In big cities,cars and buses have polluted the air.
Factories have also polluted the land and the water.
In our daily life, we should face more environmental problems.
Can you say something about them
People have cut down millions of trees.
Air pollution is destorying ozone.
Free talk
Free talk
CO2 carbon dioxide increase a lot, form a “blanket”, the heat from the sun can’t escape
New words
take away 拿走
oxygen [ ks d ( )n] n.氧气
hole [h l] n.洞,坑
ozone layer [ z n'[ le ] ] 臭氧层
radiation [re d e ( )n] n.放射，放射物
New words
directly [d 'rektli] adv.直接地
carbon dioxide [ kɑ b n] [da ksa d] 二氧化碳
form [f m] v.出现
blanket [ bl k t] n.毛毯，毯子
New words
escape [ 'ske p] n.&v.逃跑；逃脱
rise [ra z] v.上升，上涨
the greenhouse effect 温室效应
refer [r f ] 提到，涉及，有关
What’s it about
take away
hole
directly
form
rise
radiation
oxygen
blanket
escape
refer to
the greenhouse effect
Work on 1a
What’s it about
Read and understand.Look at the following pictures and predict the main idea of the passage.
fewer trees
factory pollution
traffic pollution
the ozone layer
more carbon dioxide
What’s it about
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 dioxide
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
What’s it about
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 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.
Traffic Pollution
Factory Pollution
What’s it about
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 dioxide
_____________ 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.
The Ozone Layer
What’s it about
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 dioxide
______________ __ 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
Work on 1b
What’s it about
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
A.Environment Problems B. Pollution on the Earth
C. Hope for the Future D. The Greenhouse Effect
Work on 1b
What’s it about
Read 1a and complete the following tasks.
Watch and follow
be good for对...有益
Language points
for+一段时间 现在完成时
然而
Fewer Trees
全世界
砍倒
数百万
take away 拿走 be taken away 被带走
disappear 消失
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.
What’s it about
_____ _______ 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.
Traffic Pollution
Factory Pollution
Language points
health 健康 healthy 健康的
作为结果
be dead 死亡
Language points
_____________ 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.
The Ozone Layer
be important to 对...很重要
空气污染
臭氧层
太多
危险的
What’s it about
______________ __ 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
Language points
come from 来自
温室效应
Read and remember
be good for 对...有益
take away 拿走
all over the world 全世界
cut down 砍倒
millions of 数百万
as a result 作为结果
be dead 死亡
be important to 对...很重要
air pollution 空气污染
ozone layer 臭氧层
too much 太多
come from 来自
the greenhouse effect 温室效应
Match phrases
What’s it about
be dead
ozone layer
be important to
the greenhouse effect
all over the world
take away
millions of
air pollution
as a result
死亡
数百万
对...很重要
温室效应
拿走
空气污染
臭氧层
作为结果
全世界
Work on 1c
What’s it about
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
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
What’s it about
Surf the Internet to collect more information about environmental problems and effects. Then discuss the information in groups and take notes.
Work on 2
Work on 3
What’s it about
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.
Thank you
