外研版 必修3 Module 4 Sandstorms in Asia Introduction and ReadingPP(29张)

(共28张PPT)
Module 4
Module 4
Sandstorms in Asia
Introduction
and
Reading
To learn about sandstorms in Asia
To learn what cause the sandstorm
To learn how to prevent the sandstorm
Beautiful world
Tornado 龙卷风
Debris Flow 泥石流
Drought 干旱
Flood 洪水
But someday, something happened!
Look at the following pictures. What happened in these pictures Try to describe them.
There is a sandstorm and the sky is yellow. We can hardly see anything.
Sandstorm
The sand almost buries the cars.
It is very frightening.
What is a sandstorm
Look at the picture plete the sentences using the correct form of these words.
There has been a __________. It __________ ________________ for ten hours and was very __________. The wind __________ the sand high around the houses, and some cars were almost completely _________ by the sand.
sandstorm
has been blowing
frightening
was blowing
buried
has lasted /
blow bury frightening last (v.) sandstorm
We shouldn’t go out.
We have to wear hoods, masks and glasses.
Cars slow down and have to turn on headlight.
What should we do in a sandstorm to protect ourselves？
What’s the cause of sandstorms
The cause of sandstorm
cutting down too many trees;
desertification (沙漠化);
high temperature and little rain;
serious air and water pollution;
the growing population of the world;
improper (不合适的) use of land;
rapid spread of urbanization(都市化).
Look at the photo. Answer the questions.
Read and match the main ideas with each paragraph.
Para.1
Para.2
Para.3
Para.4
Para.5
Para.6
A. the description of sandstorms
B. the influence of sandstorms to Beijing.
C. the measures the government takes to prevent sandstorms
D. Sandstorms have been a major disaster in Asia for centuries.
E. the suggestions the weather experts give to people
F. the cause of the sandstorms in the northwest China.
Para.1
Para.2
Para.3
Para.4
Para.5
Para.6
Finish the information about sandstorms.
Sand-storms
Strong and ______ winds carrying sands
Too ______ for people to see the sun, and strong enough to move sand dunes.
Mainly in Central Asia, North America, Central Africa and _________.
Australia
dry
thick
Read the text and fill in the blanks.
General information about sandstorms Definition Strong, 1. ________ winds that carry sand
Places they often occur In 2. ___________, North America, Central Africa and Australia
Sandstorms in China Reason for their increasing Desertification
dry
Central Asia
Sandstorms affecting Beijing ☆A(n) 3. ________ sky
☆ Strong winds covering the city in a(n)
4. ________, brown-yellow dust
☆ The storms sometimes continuing all
day
☆Traffic moving at very low speed
☆ 5. ________ of sandstorms hard to be
forecast
☆Citizens being advised to stay indoors
Solution to sandstorms Planting 6. ________
orange
thick
Strength
trees
Choose the best answers.
1. Sandstorms are strong winds carrying ___________ through the air.
A. dirt and mud B. rain and heat
C. sand and dust D. cloud and snow
2. What do the experts advise people to do when a sandstorm arrives in the city
A. Don’t go out B. Don’t wear masks.
C. Don’t go to work as usual. D. Don’t ride bicycles
3. The factors that cause land to be desert are ______.
A. cutting down trees. B. digging up grass
C. climate changes D. all of the above
4. From the last paragraph we know ____.
A. the government won’t plant trees any more in five years
B. the distance between the desert and the center of Beijing
is only 250 kilometers
C. more than 30 million trees have been planted in Beijing
D. the government is taking measures to prevent sandstorms
What measures should we take to prevent sandstorms
plant trees
ride bikes
recycle
save electricity
save water
use less paper
Measures:
1. We should plant more trees and grow more grass.
2. Control air and water pollution.
3. Build green fences along the desert.
4. Forecast sandstorm’s real time to prevent disaster.
5. All countries should join hands to propose a plan in sandstorms control and prevention.
1. Find more information about sandstorms on the
Internet or other books and write a short
passage about sandstorms.
2. Design a poster that encourages people to
protect the environment.