外研版必修3 Module 4 Sandstorms in Asia Reading 课件（27张PPT）

(共27张PPT)
But one day something happened.
sandstorm
What are the causes of sandstorms?
Thinking
The causes of sandstorms
1. desertification(沙漠化);
2. climate changes;
3. cutting down trees and digging up grass;
4. improper use of land;
5. high temperature and little rain;
6. the destruction of environment;
7. the growing population of the world…
Words
desertification
campaign
citizen
mass
cut down
wake up to
wear a mask
more than
沙漠化
战役 活动
公民 市民
大量的 大规模的
砍倒
醒来,看到,意识到
戴口罩
超过 不仅仅
Fast-reading
Read the passage quickly and match the main ideas with each paragraph.
Match the main idea with each paragraph.
Para.1
Para.2
Para.3
Para.4
Para.5
Para.6
A. the description of sandstorms
B. the effects of sandstorms to Beijing.
C. the measures the government takes to prevent sandstorms
D. Sandstorms have been a major disaster.
E. the advice the weather experts give to people
F. the causes of the sandstorms in China.
description
effects
measures
a major
disaster
advice
causes
1.A government campaign has been started to help solve the sandstorm problem.
2.The winds in a sandstorm can sometimes prevent you from seeing the sun.
3.Northwest China is the sandstorm centre in Central Asia.
4.The Chinese Central Weather Station can only forecast a sandstorm some months before it arrives.
5.It is frightening to be cycling in a sandstorm.
6.The government is planting trees to the east of Beijing to prevent the desert coming nearer.
mass
part of
weeks
west
Careful-reading
Read the passage again carefully and answer some questions.
Part1 (Para.1)
What’s the function(功能) of the first paragraph?
A. To lead in the topic of this passage.
B. To tell us what sandstorms are.
C. To tell us where the sandstorms occur.
1. What are sandstorms?
2. Where do sandstorms occur often?
3. Who experienced a sandstorm when he
was young and what’s his feeling?
4. Why have sandstorms increased in China?
5. When sandstorms happen in Beijing,
what’s the weather like?
Part2 (Para.2-4)
What
Where
Who
Why
When
strong
dry
winds
carry sand
1.What are sandstorms?
sandstorms
are
2. Where do the sandstorms often occur?
Central Asia
North America
Central Africa
Australia
4. Why sandstorms have increased in China?
Sandstorms appear to have increased in recent years as a result of desertification.
3. Who experienced a sandstorm when
he was young and what was his feeling?
desertification
Ren Jianbo experienced a sandstorm when he was young. And he thought that………..
When __________ happen , citizens wake up to an orange _____ and strong ______ that cover the city in a thick, brown-yellowed _____.
dust
sky
winds
sandstorms
5. When sandstorms happen in Beijing,
what is the weather like?
Traffic ?
Part 3 (para.5-6)
1.What’s the weather experts’ advice?

They advise people not to go out.
2.What is the government doing to
control sandstorms?
The government is planting trees.
Post-reading
Fill in the blanks according to the passage
Sandstorms are strong, dry _____ that carry sand. They appear to ___________(increase) in recent years as a _____ of desertification. When they happen, the traffic moves very ______(slow) because the thick dust makes ___ difficult to see.
When a sandstorm arrives in the city, weather experts ______ people not to go out. ____ you want to go out, you’d better wear a ______.
Scientists have tried many ways ___ solve the problem and a mass campaign _____________ (start) in China.
advise
to
result
mask
slowly
it
have increased
If
has been started
winds
①
②
③
④
⑤
⑥
⑦
⑧
⑨
⑩
Discussion
What can we do to protect our earth?
Task1: Work in groups of four and
make a list of your suggestions
recycle
save water
plant trees
save electricity
ride bikes
use less paper
L
Join together and save it for our future.
We have only one earth
1. Write the composition down in your homework book.
2. Design a poster that encourages people to protect
the earth.
Homework:
World Earth Day
世界地球日
(4月22日)

它是一项世界性的环境保护活动,其主题为“我们只有一个地球”。2009年第63届联合国大会决议将每年的4月22日定为“世界地球日”。该活动旨在唤起人类爱护地球、保护家园的意识，促进资源开发与环境保护的协调发展，进而改善地球的整体环境。