Module 5 Great people and Great Invention Introduction 课件（27张PPT）

课件27张PPT。floodIntroduction lightningIntroduction hurricaneIntroduction tornadoIn the USIntroduction Volcanic eruption Introduction EarthquakeIntroduction The sky is yellow and it is difficult for us to see things clearlyIntroduction SandstormsA survey: True or False- Sandstorms begin in desert areas. - Deserts are created by climate changes. - Deserts are also created because people cut down trees and dig up grass. - Sandstorms from Asia have blown across the Pacific Ocean to America. - Sandstorms can’t be prevented. - The inland region has more sandstorms than the one near the sea. Introduction M4Sandstorms in AsiaFast reading:Para.1 a. the description of sandstorms Para.2 b. the causes of sandstorms Para.3 c. a major disaster in Asia Para.4 d. the effects of sandstorms Para.5 e. the government’s measures Para.6 f. the forecast and suggestions Match the main idea of each paragragh.North AmericaCentral AfricaAustralia Central AsiaI. Read the passage and 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 Careful-reading2. 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 above4. 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 sandstormsCauses: 1. Cutting down too many trees; 2. Desertification ; 3. High temperature and little rain; 4. Serious air and water pollution; 5. The growing population of the world; 6. Improper use of land… what caused the sandstorm?The day before yesterdayYesterdayToday Now work in pairs. Discuss what we should do to protect our environment.Plant more trees and grow more grassReduce air pollution, live a low carbon dioxide life Put different garbage into different bagsRecycle useful rubbishUse some new energy, such as wind, water and sunUse fewer plastic bags. Take the bus or walk instead of driving cars. Don’t eat too much meat. Don’t use disposable chopsticks.Other suggestions on protecting our environment:Write a composition about how to protect the environment. HomeworkMODULE4Thank you!