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仁爱英语九年级unit2topic3sectionC课件

发布时间:2013-11-30 16:33:56  

Unit 2 Topic 3 Would you like to be a greener person? Section C

河南信阳市第九中学分校

梅芳芳

Use but, and, while to answer the following questions. ?What activities should we do to protect the environment? ?What activities shouldn’t we do to protect the environment?

Look up these words in a dictionary.

power

电力; 动力;力

acid rain

efficient
效率高的; 有能力的

酸雨

nuclear
electric
电动的, 用电的

可更新的

renewable

原子核的, 原子能的; 核动力的

Look at the following pictures and guess the meaning of the underlined word.

Wind is used for producing electricity in many places.

Look at the following pictures and guess the meaning of the underlined word. More and more people are interested in electric cars.

Look at the following pictures and guess the meaning of the underlined words. The maglev train in Shanghai uses magnets. The magnets push the train forward.

Look at the following pictures and guess the meaning of the underlined words. …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 word. Nuclear power is clean but it is very dangerous.

Read 1a and answer the following questions. Why isn’t coal a good material? It is very dirty and causes acid rain. What is the disadvantage of using nuclear power? Nuclear power can be very dangerous. What do you think of electric cars? They are very efficient and cost very little to run. What do you think of the maglev train? It is quiet and quick.

Choose the right picture for each paragraph of 1a.
Electric vehicles were developed in the 1990s. Now there are electric vehicles in many countries. They are very efficient and cost very little to run. Although electric vehicles produce no pollution, there will be an increase in electricity needs if they are widely used. a 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 b are much more expensive than traditional steel railways.

China is one of the first countries in the world to use biogas technology. c Farmers recycle straw, grass and animal waste to make biogas. This renewable energy is used in people’s everyday life.

1b

Work alone

Read 1a again and fill out the following table. Way to produce power biogas electric vehicle Advantage
renewable efficient, cheap, no pollution It will cause an increase in electricity needs.

Disadvantage

maglev train

quiet, quick, much more energry efficient, expensive than no pollution traditional trains.

(

)

(

)

a a. There are more than 3 000 power stations in the world that produce electricity by burning garbage to heat wat

er. b b. People use the movement of water to produce electricity. c. Wind is used for c producing electricity in many places. d. People produce d electricity from the sun.

(

)

(

)

Fill in the blanks using but, and, though and while.
1.Though it’s raining hard, he keeps on working outside. _____ 2. Kangkang can solve the problem, ______ I can’t. while

and 3. Mr. Lin is very kind _____ he is very humorous.
but 4. The suit fits me well _____ I can’t afford it.

Use but, and, though and while to describe the ways of producing power.

3

Written work

What good habits protect the environment? List as many as you can. The more you list, the greener you are. Good Habits
1. Turn off the lights when you leave a room. 2. Walk or ride a bike instead of taking a bus or a taxi. 3.Take a cloth bag when you go shopping. 4.Don't use plastic bags.

Useful expressions
In many countries, people produce power from coal or nuclear energy. It’s a pity that it’s too expensive to use in most of China.

Work in groups Think of more ways to produce power. And talk about their advantages and disadvantages.

The method we have known The new method animal waste burn garbage

water
wind

sun
magnets

1、列出更多的保护环境的好习惯。

2、课后搜集好的节能环保的方 法或者产品与大家交流。 3、预习Section D。

Goodbye !


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