Unit 2 Topic 3 What can we do at home to protect the environment? Section C 课件(33张PPT,无音视频)

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名称 Unit 2 Topic 3 What can we do at home to protect the environment? Section C 课件(33张PPT,无音视频)
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更新时间 2019-08-19 21:37:11

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课件33张PPT。Unit 2 Saving the Earth Topic 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 meaning
of the underlined word. electricity n. 电,电流Nuclear power is clean but it is very dangerous.Look at the following pictures and guess the meaning
of the underlined word. nuclear 原子核的,原子能的
…people produce power from coal, but it is very
dirty and causes acid rain.Look at the following pictures and guess the meaning
of the underlined words.power n.动力,力量 acid rain 酸雨electric (adj.) — electricity (n.) Look at the following pictures and guess the meaning
of the underlined words.It’s an electric car. It works well, but its disadvantage is that it’ slow and
Can’t run for long. It’s a maglev train. Its advantages are quiet, fast and clean, but it’s too expensive. 磁悬浮列车n.技术Do you know it ?China is one of the first countries in the world to use biogas technology . 沼气Read and remember these words. power acid rain nuclear renewable electric biogas电力;
动力;力酸雨原子核的,
原子能的;
核动力的可更新的电动的,
用电的沼气
Match the words with the pictures on Page 48 (1b).A. acid rain B. nuclear 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). ( ) It’s good that people produce power from coal.
( ) Nuclear power is dangerous. So we can’t use it.
( ) To solve the energy problem, people all over the world are looking for new ways to produce power. Paragraph 1In many countries, people produce power from coal, but it is very dirty and causes acid rain. Some countries use nuclear energy to produce power. 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.Paragraph 1Read Paragraph 1 again, and then mark True (T) or False (F). ( ) It’s good that people produce power from coal.
( ) Nuclear power is dangerous. So we can’t use it.
( ) To solve the energy problem, people all over the world are looking for new ways to produce power. TFTParagraph 1Paragraph 2What 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 waste to make biogas. This renewable energy is used in people’s everyday lives. Its key disadvantage is that the process requires a long time( up to 30 days) and the cost is highParagraph 2Paragraph 2What do farmers use to make biogas?
It is the biogas perfect ? Why?
They recycle straw, grass, and animal waste to make biogas.No, it isn’t. Because its key disadvantage is that the process requires a long time (up to 30 days) and the cost is high.Paragraph 3 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 and CO2. It can not only protect the environment but also _____ energy. It’s too small to hold many people, but _______ models will be developed in the near future. develop, electric, name, save, large developednamedelectricitysavelargerParagraph 41.去30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431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 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.Paragraph 4Paragraph 41.去30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时431公里。The train can reach a top speed of 431 km per hour. 1c Read 1a again and complete the table. renewablelong process and high cost for its building save energy,
no pollutiontoo small to hold many people quiet, quick, energy-efficient, no pollution much more expensive than traditional steel railways Find out the key phrases in 1a1. look for new ways
2. in the 1990s
3. one of the first countries
4. people all over the world
5. in people’s everyday/daily lives
6. in the near future
7. reach a top speed
8. much more expensive
9. use… to do
10. be used for doing/ to do sth.1.寻找新方法
2.在20世纪90年代
3.首批国家之一
4.全世界的人
5. 在人们的日常生活中
6.在不久的将来
7.达到最高时速
8.更贵得多
9.用……来做
10. 被用作Language pointsSome countries use nuclear energy to produce power.
思考:使用某物来做某事
___________________/___________________
练习:a.在过去人们使用竹子写字.
People _______ bamboo ___ ______ 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 writeusefor3. The train can reach a top speed of 431 km per hour.
点拨:reach a speed of+具体速度 ---达到某个速度
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:a.北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 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 adv.深深地, 在深处run out 用完,耗尽
E.g. He has run out of food, so his children are hungry. run out /run out of 用完,耗尽
run out 主语为物,且无被动。
run out of 主语为人
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 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. 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. What’s more, we can even use it to run vehicles directly in the near future.
As is known to us, the energy from the sunlight has a lot of advantages. For example, it is clean, renewable and non-polluting. Besides, it does no harm to our nature. So we’d better use it as much as possible. You can write it like this:We learn: 1. Some words: technology, wheel, steel, require, German, guide , deep
2.Some phrases: run out
3.Some sentences:
(1)In many countries, people produce power from coal, but it is very dirty and causes acid rain.
(2)They will never run out so they are called renewable sources.
We can: Talk about the advantages and disadvantages of some kinds of energy.SummaryAssignmentRead 1a again and try to retell it.
Memorize the useful expressions and key sentences which we learn today.
3. Finish Section C in your workbook. coal--- dirty, acid
nuclear energy --- dangerous
electric vehicles --- the sun, the wind andCO2---protect the environment, save energy, small
maglev train ---German-built, quiet, quick, no wheel noise, energy-efficient, not pollute the air
biogas technology – straw, grass and animal waste, everyday lives, require, the high cost Retell 1a