九年级英语上册Unit2SavingtheearthTopic3WhatcanwedoathometoprotecttheenvironmentSectionC课件（新版）仁爱版

1、Unit 2 Saving the EarthTopic 3 What can we do at home to protect the environment? Section C Wind is used for producing electricity in many places.Look at the following pictures and guess the meaningof the underlined word. electricity n. 电，电电，电流流Nuclear power is clean but it is very dangerous.Look at

2、 the following pictures and guess the meaning of the underlined word. nuclear 原子核的，原原子核的，原子能的子能的people produce power from coal, but it is verydirty and causes acid rain.Look at the following pictures and guess the meaningof the underlined words.power n.动力，力量动力，力量 acid rain 酸雨酸雨electric (adj.) electr

3、icity (n.) Look at the following pictures and guess the meaningof the underlined words.Its an electric car. It works well, but its disadvantage is that it slow and Cant run for long. Its a maglev train. Its advantages are quiet, fast and clean, but its too expensive. 磁悬浮列车磁悬浮列车n.技术技术Do you know it ?

4、China is one of the first countries in the world to use biogas technology . 沼气沼气Read and remember these words. power acid rain nuclear renewable electric biogas电力；电力；动力；力动力；力酸雨酸雨原子核的，原子核的，原子能的；原子能的；核动力的核动力的可更新的可更新的电动的，电动的，用电的用电的沼气沼气Match the words with the pictures on Page 48 (1b).A. acid rain B. nu

5、clear energy C. biogas ACBadj.原子核的，原子能的酸雨1a Read and understand. Look at the pictures. Do you know what they are? Choose the right picture for each paragraph. paragraph 2 paragraph 3 Paragraph 4Read Paragraph 1 again, and then mark True (T) or False (F). ( ) Its good that people produce power from c

6、oal. ( ) Nuclear power is dangerous. So we cant use it. ( ) To solve the energy problem, people all over the world are looking for new ways to produce power. In many countries, people produce power from coal, but it is very dirty and causes acid rain. Some countries use nuclear energy to produce pow

7、er. However, nuclear power can be very dangerous. To solve the energy problem, people all over the world are looking for new ways to produce power.Read Paragraph 1 again, and then mark True (T) or False (F). ( ) Its good that people produce power from coal. ( ) Nuclear power is dangerous. So we cant

8、 use it. ( ) To solve the energy problem, people all over the world are looking for new ways to produce power. TFT What do farmers use to make biogas? It is the biogas perfect ? Why? China is one of the first countries in the world to use biogas technology. Farmers recycle straw, grass and animal wa

9、ste to make biogas. This renewable energy is used in peoples everyday lives. Its key disadvantage is that the process requires a long time( up to 30 days) and the cost is high What do farmers use to make biogas? It is the biogas perfect ? Why?They recycle straw, grass, and animal waste to make bioga

10、s.No, it isnt. Because its key disadvantage is that the process requires a long time (up to 30 days) and the cost is high. Electric vehicles were _ in the 1990s. On April 11, 2010, a new kind of electric vehicle _ “Yezi” was shown in the 2010 Shanghai World Expo. It produces _ from the sun, the wind

11、 and CO2. It can not only protect the environment but also _ energy. Its too small to hold many people, but _ models will be developed in the near future. develop, electric, name, save, large developednamedelectricitysavelarger1.去去30公里以外的飞机场只需花费人们七分钟的时间。公里以外的飞机场只需花费人们七分钟的时间。2.火车最高时速能够达到每小时火车最高时速能够达到

12、每小时431公里。公里。Find out the English version of the two sentences. In China, the best-known maglev train is the German-built one in Shanghai. It takes people just 7 minutes to go to the airport 30 km away and reaches a top speed of 431 km per hour. It is quiet and quick. There is no wheel noise, because

13、 there are no wheels. Maglev trains are very energy efficient and do not pollute the air. However, maglev guide paths are much more expensive than traditional steel railways.1.去去30公里以外的飞机场只需花费人们七分钟的时间。公里以外的飞机场只需花费人们七分钟的时间。It takes people just 7 minutes to go to the airport 30 km away. 2.火车最高时速能够达到每小

14、时火车最高时速能够达到每小时431公里。公里。The train can reach a top speed of 431 km per hour. 1c Read 1a again and complete the table. ItemAdvantageDisadvantagebiogas electric vehicle maglev train renewablelong process and high cost for its building save energy, no pollutiontoo small to hold many people quiet, quick,

15、energy-efficient, no pollution much more expensive than traditional steel railways Find out the key phrases in 1a 1. look for new ways 2. in the 1990s 3. one of the first countries 4. people all over the world 5. in peoples everyday/daily lives 6. in the near future 7. reach a top speed 8. much more

16、 expensive 9. use to do 10. be used for doing/ to do sth.1.寻找新方法寻找新方法2.在在20世纪世纪90年代年代3.首批国家之一首批国家之一4.全世界的人全世界的人5. 在人们的日常生活中在人们的日常生活中6.在不久的将来在不久的将来7.达到最高时速达到最高时速8.更贵得多更贵得多9.用用来做来做10. 被用作被用作Language points Some countries use nuclear energy to produce power.思考：使用某物来做某事_/_练习：练习：a.在过去人们使用竹子写字.People _ ba

17、mboo _ _ with in the past. b.人们用风发电。 People _ wind _ producing electricity. use sth. to do sth. use sth. for doing.used to writeusefor 3. The train can reach a top speed of 431 km per hour. 点拨：点拨：reach a speed of+具体速度 -达到某个速度 链接：链接：at a speed of + 具体速度-以某个速度, 可用high, low, full等形容词修饰speed 。 练习：练习：a.北

18、京至天津线火车时速达到每小时300千米。 Beijing-Tianjin train _ _ _ _ 300 km per hour. reaches a speed of2a Read the passage below and match the pictures with the sentences. Then discuss in detail the use of one energy source. The sun, wind, waves and heat from deep in the earth are energy sources. They will never run

19、 out so they are called renewable sources. In 2011, about 16% of energy used worldwide came from renewable sources. The use of it is increasing rapidly each year. deep adj.深的，厚的深的，厚的 adv.深深地，深深地， 在深处在深处run out 用完，耗尽用完，耗尽E.g. He has run out of food, so his children are hungry. run out /run out of 用完，

20、耗尽用完，耗尽 run out 主语为物，且无被动。主语为物，且无被动。 run out of 主语为人主语为人 我们的食物已经用完了。我们的食物已经用完了。 Our food has already run out.= We have already run out of the food.2a Read the passage below and match the pictures with the sentences. Then discuss in detail the use of one energy source. Wind can produce electricity in

21、 many places. People use sunlight to produce electricity. Sea waves are used for producing electricity. People use hot water or steam from deep in the earth to produce electricity and heat for factories, schools and homes. 阳光，日光水蒸汽，蒸汽，水汽2b Take notes on your discussion and write a passage with them.

22、 You may begin like this: Sunlight can produce a lot of energy. People began to use the energy from the sunlight in different ways many years ago Sunlight can produce a lot of energy. People began to use the energy from the sunlight in different ways many years ago. We can use it to warm the house in the winter, to heat the water for baths, and to produce electricity. Whats more, we can even use it to run vehicles directly in the near fut