人教版高中英语配套ppt课件：选修6 unit 4 period 1

Unit 4 Global Warming

People and the sources of air pollution are found in the same places. This means that cities

with large populations have thebiggest problem of dirty air.

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Air pollution is caused by many different things. A major source of air pollution is the gas fumes from cars. Statistics show that 93 percent of all auto trips are within cities. Another major source of dirty air is

the burning of coal and oil for energy. This energy isneeded to make electricity. Of course, much more electricity is used in the city than in the country.

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On the average, we throw away more trash and garbage than the year before. ①The burning of garbage contributes to air pollution. Many major industries are also

responsible for the dirty air in the aroundcities. The fumes from iron, steel, chemical, and petroleum production add particles to the air.

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② The effects of air pollution range from mild headaches to death. The levels of pollution found in heavy for traffic may cause headaches for loss of clear vision. Wherever coal and oil are used for fuel, fumes may kill trees and plants and cause metal to corrode. In some of the larger cities, these fumes endanger the live of human beings by

contributing to lung diseases and causing early death.

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Ⅰ.阅读短文，判断正(T)误(F)

1.The purpose of this passage is to persuade people tostop polluting the air. ( ) 2.Air pollution is more grave in the city than in the country because there are much more gas fumes from cars and burning of coal and oil for energy in the city than in the country. black. contribute to heart disease. 答案 1.F 2.T 3.F 4.F话题美文欣赏 课前自主学习 课堂互动探究

( ( (

) ) )

3.The fumes from coal and oil may cause metal to turn

4.In larger cities, the fumes from coal and oil may

Ⅱ.佳句仿写 1.诚实加苦干有助于成功和幸福。 Honesty and hard work contribute ________ ________ ________ to success ________ and ___________. happiness

2.这个汽车旅馆的房价每天从三十美元到五十美元不等。The room rate at this motel ________ ________ ________ ________ ________ per day. ranges from $30

to

$50

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Unit 4 Global Warming Period 1 Warming Up, Pre-reading & Reading 课件(人教版选修6,课标 通用)Ⅰ.单词识记1. ________v. to pay money, usually once a year, to have subscribe copies of a newspaper or magazine sent to you, or to have some other service 2.________ consume v.to use sth up,especially fuel,energy or

time;to eat or drink sthtrend n.a general tendency in the way a situation is 3.________ changing or developing话题美文欣赏 课前自主学习 课堂互动探究

4._

_______ fuel n.a substance such as coal, gas, or oil that

can be burned to produce heat or energyglance v.to look quickly at sth/sb 5.________ range n. a number of people or things that are all 6.________ different, but are all of the same general type 7.________ random adj.happening or chosen without any definite plan,aim or pattern 8.____________ catastrophe n.a terrible event in which there is a lot of destruction or many people are injured or die steady adj. continuing or developing gradually or 9.________ without stopping, and not likely to change oppose v.to disagree with something 10.________话题美文欣赏 课前自主学习 课堂互动探究

Ⅱ.短语天地

go up 1.____________ 上升；增长；升起 2.____________ 即使 even if3.____________ come about 发生；造成 4.______________ in the range of 在 范围内

5.____________( glance at 粗略地)看一下；扫视6.subscribe to___________________ 同意；赞成；订购 7.keep on____________ 继续 反对 8.be opposed to____________ 大量的 9.quantities of____________

导致 10.result in____________话题美文欣赏 课前自主学习 课堂互动探究

Ⅲ.句型搜索 1.There is no doubt that the earth is becoming warmer and that it is human activity that has caused this global warming rather than a random but natural phenomenon. [信息提取] [例句仿写] There is no doubt that...,毫无疑问 。 毫无疑问，我们能把这项工程设计出来。

________ ________ ________ There ________ is no doubt ________ that we will

succeed in designing the project.

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2.It means that more heat energy tends to be trapped inthe atmosphere causing the global temperature to go up. [信息提取] [例句仿写] ________. pieces causing the global temperature to go up 是 他把杯子掉了，结果摔得粉碎。 现在分词短语作状语，表示结果。

breaking ________ it into He dropped the glass, ________ ________

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3 . Even if we start reducing the amount of carbondioxide and other greenhouse gases , the climate is going to keep on warming for decades or centuries. [信息提取] even if= even though“即使，尽管”(引 导让步状语从句)

[例句仿写]________ Even

即使我这次失败了，我还要再试试。________ if ________ I ________ fail ________ this

time , I would try again. ________

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Ⅳ.预读理解 1.Fast Reading:Scan the text and choose the best

answers according to the text.①Who among the four is the author? A.Sophie Armstrong. C.Dr Foster. B.Charles Keeling. D.George Hambley.

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②Who found out the amount of carbon dioxide in the

atmosphere from 1957 to 1997?A.Sophie Armstrong. C.Dr Fost

er. B.Charles Keeling. D.George Hambley.

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③What are the graphs and quotes for? A.To attract readers' attention. B.To introduce the topic of global warming. C.To give some examples. D.To support the opinion and make it more

convincing.

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④What is the purpose of the last paragraph? A.To make readers disappointed with the problem. B.To make readers think about the problem.

C.To show the author's opinion on the problem.D.To begin some discussion about the future.

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