Module 4 Sandstorms in Asia

1. Module 4 Sandstorms in Asia Period One

2. Sandstorms have been a major disaster for many Asian countries . Scientists have tried many ways to solve this problem.And the chinese government Is giving more attention to the problem.

3. 这张照片是3月17日由NASA的OrbView-2卫星拍摄的真彩色照片这张照片是3月17日由NASA的OrbView-2卫星拍摄的真彩色照片 。在照片上，沙尘已经越过黄海，到达了日本以东的太平洋上空。 事实上，这次10年以来中国北方最大的沙尘暴不仅仅影响了日本， 据美国国家海洋和大气局（NOAA）报告，这次的沙尘暴已经跨越 太平洋，于27日到达了美国西海岸！

4. Listen to the tape and choose the best answer 1.Sandstorms are strong winds carrying__ through the air( ) A.sand and dust B.rain and heat C.dirt and mud 2.Which of the following doesn’t belong to the main places where there are sandstorms?( ) A.Central Asia B.Central Africa C.North Europe 3.What do the experts advise people to do when a sandstorm arrives?( ) A.Don’t wear mask B.Don’t go out C.Don’t go to work as usual. A C B

5. Read the passage and fill in the blanks with the words in the box solve 1.Scientists have tried many ways to _________this problem. 2.To have __________________a sandstorm was a terrible experience. 3.It was the most __________ and the most dangerous situation I’ve ever been in 4.The Weather Station can___________ a sandstorm some weeks before it arrives. been caught in frightening forecast

6. Phrases to remember • 1.for centuries 多个世纪以来 • 2.Solve the problem解决问题 • 3.Get caught in 被困住 • 4.cut down砍倒；削减 • 5.wake up to 警觉到；意识到 • 6.make it adj/noun to do /clause • 7.advise sb not to do sth建议某人不要做某事 • 8.prevent sb from doing sth阻止某人做某事

7. 高考链接：不定式的完成时表示不定式的动 作发生在谓语动词的动作之前 EgTo have been caught in a sandstorm was a terrible experience. Sandstorms in China appear to have increased in recent years. ( NMET)Charles is generally considered ____ the first computer. A. To invent B. inventing C.to have invented (NMET)Bobert is said____abraod,but I don’t know what country he studied in. A.To have studied B.to study C.to be studying C A

8. What’s the cause of sandstorms?

9. What caused sandstorms? • Sandstorms are caused by strong winds blowing over loose soil or sand, and picking up so much of that material that visibility is reduced. In desert regions at certain times of the year, sandstorms become more frequent because the strong heating of the air over the desert causes the lower atmosphere to become unstable. This instability mixes higher winds in the middle troposphere downward, producing stronger winds at the surface. In the United States, these events are often referred to as "dust storms".

10. Work in pairs to prepare an interview .one of the two partners acts as an interviewer,And the other is walking or driving in the sanstorm.

11. You may begin like this : What’s your opinion of the sandstorm? It’s terrible!

12. Damage of sandstorms 1. Sandstorms can pollute the atmosphere and carry away top soil. When the top soil is carried away, on which plants grow, land becomes barren, yielding much less. 2. Also the breaking out of sandstorms brings more solid pollutants into the atmosphere and damages the environment. 3. Even sandstorms can kill people and animals and pull down buildings. In fact, sandstorms cause as much damage as typhoons and hurricanes.

13. What should be done to prevent sandstorms? Work in groups to discuss this question

14. Since Beijing urgently needs to improve the environment to prepare for the Beijing 2008 Olympic Games, let’s write a letter to the mayor of Beijing, suggesting some ideas to prevent sandstorms. Dear Mr Wang, I’m a middle school student .I want to give some Ideas to prevent sandstorms………

15. The end Thank you for your instructions!