資源簡介

九年級 下冊
教學課件
Unit
3
Oxford English
Module 2 Environmental problems
Period 2
Reading (II)
The environment
1
Check-up
Say something about the three main problems people face and their effects.
The greenhouse effect
Cutting down forests
Bad habits
2
While you read
The world is in danger
Our world is in danger. We must do something to protect the environment. But, what are the main problems we face?
The greenhouse effect
The atmosphere around the Earth is necessary for all living things. It is like the glass of a greenhouse, letting sunlight in and keeping heat from getting out. Without it, the Earth would be the same as the Moon—cold and lifeless.
When we burn fuels such as petrol and coal, we produce a gas called carbon dioxide (CO2). Too much of this gas pollutes the atmosphere, and causes it to keep in too much heat. As a result of the greenhouse effect, the Earth’s temperature is increasing. This causes sea level to rise, and in the future may cause cities to disappear.
Read the first part of the text and put the sentences below in the right order.
( ) Too much CO2 pollutes the atmosphere.
( ) The atmosphere does not let the heat out.
( ) The atmosphere lets the sunlight in.
( ) The atmosphere keeps in too much heat.
( ) The sunlight reaches the atmosphere of the Earth.
( ) The greenhouse effect takes place—the Earth’s temperature increases.
( ) People burn fuels such as petrol and coal and produce
a lot of CO2.
2
5
4
1
6
3
7
Read the first part of the text and put the sentences below in the right order.
Cutting down forests
Every year, we destroy nature by cutting down huge areas of forests. This makes the greenhouse effect worse because trees take in CO2 and produce oxygen. Cutting down trees also destroys the homes of the animals that live in our forests, and causes the surface of the soil to be easily destroyed by rain. This can result in floods and even more damage to the environment.
Read the second part of the text and complete the diagram.
Read the second part of the text and complete the diagram.
We destroy nature by ______
_________________________.
_____________________becomes worse.
____________________________________________________________.
____________________________________________________________.
________take
place and_____
_____________________ to the environment.
cutting down huge areas of forests
The greenhouse effect
The homes of the animals that live in our forests are destroyed
The surface of the soil is easily destroyed by rain.
Floods
even more damage is done
Cause
Effect 1
Effect 2
Effect 3
Effect 4
Bad habits
Many of our habits cause pollution. People often use things once and then throw them away, or leave them on the ground as litter. This creates mountains of rubbish and pollutes our
land and seas.
Read the third part of the text and complete the diagram.
Read the third part of the text and complete the diagram.
People often _____________
_______________________, or _____________________
_________________.
___________________________________.
__________________________________.
This creates mountains of rubbish
This pollutes our land and seas
use things once and then throw them away
leave them on the ground as litter
Cause
Effect 1
Effect 2
In order to protect the environment, we need to take proper action. We should be different from many
consumers and become “green consumers”. This means that we should only buy and use products
friendly to the environment. We should also recycle as
many things as we can. We can reuse things for
the same purpose as before, or we can use them for new purposes. If we just learn to live in new and different ways, we can make a difference.
Read the last part of the text and fill in the table.
{74C1A8A3-306A-4EB7-A6B1-4F7E0EB9C5D6}Topic sentence
______________________________ ____________________________________________________
The writer’s suggestions
to become _________________
to _________________________
___________________________
to _____________________as we can (e.g. ____________________
________________________, ___
_______________________, etc.)
Conclusion
We can __________________.
In order to protect the environment, we need to take proper action.
“green consumers”
make a difference
Read the last part of the text and fill in the table.
buy and use products friendly to the environment
recycle as many things
reuse things for the same purpose as before
use things for new purposes
3
Vocabulary
C2 Complete the conversation below with the words from the box. Change their forms if necessary.
is resulting in/results in
increases
in danger
make a difference
take action
4
D1 Replace the italicized words with information from the article on page 35.
Comprehension
our world/the Earth
The atmosphere around the Earth
fuels such as petrol and coal
The increasing temperature
Cutting down trees
pollution
D2 Read the article again and circle the correct answers.
D3 The writer gives an example of a bad habit that causes pollution. Can you name some other bad habits that cause pollution?.
Discuss and answer
What other bad habits do people have in their daily lives?
What should we do to help protect the environment?
H
Homework
1. 抄寫單詞和短語： lifeless，fuel，coal，destroy，nature，soil，flood，friendly，recycle，purpose；result in，make a difference。
2. 整理Comprehension D3的討論內容，準備在下節課作口頭匯報。
3. 完成《練習冊》第34頁Vocabulary和第42至43頁Reading B，C的練習。
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