Unit 3 The environment Reading 课件(共39张PPT)

(共39张PPT)
Module 2
Unit 3
Reading
Environmental problems
The environment
1. To read and learn about the main problems we face in protecting the environment.
2. To learn the new words and useful expressions
Objectives
Focus on
Words:
concern atmosphere temperature guess green lifeless fuel coal result increase sea level destroy nature surface soil flood habit proper friendly recycle purpose
Phrases:
greenhouse effect in danger
as a result of result in
mountains of take action
make a difference
Patterns:
1. Without it, the Earth would be the same as
the Moon—cold and lifeless.
2. 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.
3. This can result in floods and even more damage to the environment.
4. We should be different from many consumers and become “green consumers”.
5. This means that we should only buy and use products friendly to the environment.
How green are you
Do a survey
Activity
Try to finish the test on page 46.
Let’s see who is the greenest!
green: not harmful to the environment 环保的
eg:
green products
green technology
green energy
a green activist 环保积极分子
It was voted the greenest building in Britain.
Analysis
Score
1-4 You have not started turning green yet!
5-8 You are pale green. Try harder!
9-12 You are medium green. Keep going!
13-17 You are bright green. Well done!
How many points do you get
Do you think you are green
Getting ready
What do you think they are talking about
What has Lo done
What did Hi tell Lo to do
Does Lo understand what Hi meant
What did Hi mean when he told Lo to be greener
He has painted himself green.
He told Lo to be greener.
No, he doesn’t.
Look at the cartoon and answer the questions.
He meant that Lo should care more about the environment.
polar ice melting
droughts
the rise of sea levels
Look at the following pictures and think what problems these pictures show.
The greenhouse effect.
What causes the problems
What do you know about the greenhouse effect
Some sunlight that hits the earth is reflected. Some becomes heat.
CO2 and other gases in the atmosphere trap heat, keeping the earth warm.
The greenhouse effect is the process of the gradual (逐渐的) rise in temperature of the Earth’s atmosphere.
raise the temperature
keep the heat from getting out
deforestation砍伐森林
CFCs含氯氟烃 (用于冰箱、喷雾器等)
oil and petrol engines石油和汽油发动机
greenhouse gases and fossil fuels温室气体和化石燃料
atmosphere
The greenhouse effect 温室效应
e
f
b
d
c
a
Match the first half of the sentences in column A with the second half in column B. Write the correct letters in the blanks. (P 34)
The gases cause the atmosphere to keep in too much heat from the Sun.
The Earth is getting warmer and warmer.
We call this the greenhouse effect.
There is an atmosphere around the Earth.
It controls the Earth’s temperature.
However, we are polluting the Earth with harmful gases.
1
2
3
4
5
6
Read and translate the following sentences.
What is the result of the greenhouse effect In groups, discuss this with your classmates. (P 34)
A2
The greenhouse effect results in polar ice melting and the rise of sea levels. Hurricanes (飓风) and other storms are
likely to happen more frequently as well
as floods and droughts (旱灾) . In addition, fresh water will be less available and some diseases spread faster.
title: The world is in danger
introduction: Our world is in danger. We must do something to protect the environment. But, what are the main problems we face
sub-headings:
The greenhouse effect
Cutting down forests
Bad habits
B Before you read
Look at the pictures, the title, the introduction and the sub-headings of the article on page 35. Then answer the questions below (1-3) (P 34) and make a choice (4).
What is the article mainly about
What problems does the article discuss
A consumer is someone who buys and uses things. Can you guess what a “green consumer” is
Environmental problems.
The greenhouse effect, cutting down forests and bad habits.
A “green consumer” is someone who only buys and uses things friendly to the environment.
4. The article is probably from a(n) ____.
a advertisement
b poster about the Earth
Hour
c environmental science
book
d comic book
c
Why must people do something to protect the environment
What are the main problems people face
What should people do to protect the environment
Because our world is in danger.
The greenhouse effect, cutting down forests and bad habits.
People should become “green consumers”.
Listen to the passage and answer the questions.
Task 2
( )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.
1
2
3
4
6
5
7
Read the first part and put the following sentences into correct order.
Task 1
Cause
Effect 1
Effect 2
Effect 3
Effect 4
We destroy nature by _____
________________________
down huge areas of forests
cutting
___________________
______ becomes worse.
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.
______ take place and ____ ____________
_________ the environment.
Floods
even more damage is done to
Read the second part and complete the diagram.
Task 2
Cause
Effect 1
Effect 2
People often ________________________________
_________, or ______________________________
use things once and then throw them
away
leave them on the ground as litter.
___________
___________
___________
This creates mountains of rubbish.
__________________
__________________
This pollutes our land and seas.
Read the third part and complete the diagram.
Task 3
Topic sentence ______________________________________________________
The writer’s suggestions to become _________________
to ________________________
___________________________
to ________________________ ___________________________
Conclusion We can ___________________.
In order to protect the environment, we need to take proper action.
“green consumers”
buy and use products friendly to the environment
recycle as many things as we can
make a difference
Read the last part of the text and complete the table.
Task 4
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.
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
in danger意为“在危险中”
like是介词，意为“像；相似”
let in意为“放进”
keep...from doing sth.意为“阻止……做某事”
the same as意为“和……相同”
as a result of意为“因此”
Task 5
Look out the following expressions in the article.
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.
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.
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.
result in意为“造成；导致”
be different from意为“与……不同”
mountains of意为“成堆的；大量的”
(1) 在危险中
(2) 像；相似
(3) 放进
(4) 阻止……做某事
(5) 因此
(6) 造成；导致
(7) 成堆的；大量的
(8) 与……不同
in danger
like
let in
keep...from doing sth.
as a result of
result in
mountains of
be different from
Translate the following expressions into English
As a result of
increase
sea level
surface
mountains of
Vocabulary
The words in italics explain the meanings of some words on page 35. Find these words to complete the sentences. Change their forms if necessary. (P 36)
C1
is resulting in /results in
increases
in danger
make a difference
take action
Complete the conversation below with the words from the box. Change their forms if necessary. (P 36)
in danger make a difference increase take action result in
C2
our world/the Earth
The atmosphere around the Earth
Replace the italicized words with information from the article on page 35. (P 37)
D1
D Comprehension
fuels such as petrol and coal
The increasing temperature
Cutting down trees
pollution
Read the article again and circle the correct answers. (P 37)
D2
Our world is ________. We face many problems.
1. The atmosphere around the Earth acts ___ the glass of a greenhouse. It ___ sunlight ___ and keeps ____ from getting out. Without the atmosphere, the Earth would be __ cold and lifeless __ the Moon. However, when the atmosphere is polluted by _____, it will keep in ________ heat. This is called the _______________ and it may cause sea level to ___ and make cities ________.
like
lets
heat
as
CO2
too much
greenhouse effect
rise
disappear
in danger
Task 6
in
as
Fill in the blanks to finish the summary of the text and then try to retell it.
2. Every year, we destroy nature by _____ ____ huge areas of forests. This makes the greenhouse effect _____ because trees ______ CO2 and _______ oxygen. It also destroys the homes of the animals that live in our forest and _____ the surface soil ___ to be easily destroyed by rain. This can ________ floods and even more damage to the environment.
down
worse
take in
produce
to
result in
cutting
cause
3. Many of our habits cause ________. People often use things ____ and then _______________, or leave them on the ground as ____. This creates ___________
_______ and pollutes our land and seas.
In order to protect the environment, we need to become ________________. We should only buy and use products ________________________. We should also ______ as many things as we can. We can _____ things for the same purpose as before, or we can use them for ____________.
once
throw them away
litter
rubbish
“green consumers”
friendly to the environment
recycle
reuse
pollution
mountains of
new purposes
Discussion
Activity
Discuss the questions below in groups and then report your result to the whole class. Let’s see which group is the best!
What other bad habits do people have
in their daily lives
What should we do to help protect the
environment
Waste food and water.
Spit everywhere.
Always drive cars to other places.
Forget to turn off lights when we leave the room.
bad habits
…
Possible answers
Plant flowers, grass or trees.
Whenever you visit a park or beach, take away
what you bring there—keep rubbish in a bag
until you can put it in a dustbin.
Turn off the lights, TV sets when you leave the
room. This saves a lot of electricity (电).
Turn off the tap (水龙头) when you brush your
teeth. You can save some water by not letting
it run. Besides, use a glass cup instead of a
paper cup because this saves paper.
Keep the doors and windows closed in winter
to keep warm air in.
To protect the environment we can do the following:
Give your old books and magazines to a
library instead of throwing them away.
Give your old clothes to poor children you
know instead of throwing them away.
Use both sides of paper.
Stop pouring dirty water into the rivers or
lakes nearby.
Encourage all your friends to do the same
things you do to help protect the earth. You
don’t have to wait until Earth Day to do these
things. Make every day Earth Day.
1. 我们的世界处在危险中。
Our world is in danger.
2. 他就像温室的玻璃一样， 能让阳光射进来且不会让热量散逸出去。
It is like the glass of a greenhouse, letting sunlight in and keeping heat from getting out.
3. 这可能引发洪水并对环境造成更多的破坏。
This can result in floods and even more damage to the environment.
4. 这就意味着我们应该只购买和使用那些对环境无害的商品。
This means that we should only buy and use products friendly to the environment.
翻译下列句子。
Homework
1. Learn new words and phrases by heart after class.
2. Read the articles in Learning English. The more you read, the faster and better you’ll understand.
3. Preview Listening on page 38.