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Unit22《Lesson 1 Reading》课件(北师大版选修8)


北师大高中英语第八模块
Unit 22 Environmental Protection

The earth is like a paradise, so it attracts people from other planets. But after their visit they think it’s more like a h

ell(地狱).

Why do they think it’s more like a hell(地狱)?

GLOBAL WARMING

Increased Temperature

Melting Polar ice caps

Can we take the heat?

Which countries do you think contribute more to global warming? A. developed countries

B. developing countries

more industry and technology

word study
Work out the meaning of the following words according to the sentences they appear. consensus, bounce, agriculture, coincidence, condemn, reservation, sacrifice, advocate

? 1. In the last few decades, scientists have reached consensus and reported that human beings are causing changes in the earth’s climate agreement ? 2. Without these naturally occurring gases, the sun’s rays would bounce back into space leaving the Earth cold and impossible to live on.

jump back

? 3. Given this data, it seems that the link between human activities and rising global temperatures is not merely a coincidence.
Occurrence of similar events at the same time by chance

? 4. if we continue to produce carbon dioxide and other gases in such huge quantities, we are condemning life on Earth destroying

? 5. Some government, for example, the USA’s federal government, express reservations about whether global warming is really caused by human activities. 保留意见 ? 6.Experts advocated that each person play their part to save the earth. call on

Match the Key Words with their Chinese meanings.
1.consensus 2.bounce 3.agriculture 4.coincidence 5.condemn 6.reservation 7.sacrifice 8.advocate A.反弹 B.农业 C.巧合 D.一致的意见 E.保护 F.宣判死刑 G.主张,提倡 H. 牺牲

Gist reading : Skim the text and match the heads with the paragraphs.
Para 1. 1.Consequences of global warming. 2.What should human beings do. 3.What is global warming. 4.Draw readers’ attention to the topic. 5. What cause global warming

Para 2.
Para 3. Para 4.

Para 5.

Careful reading(1)
Para.1 Introduction: Human beings are causing____ and it is believed that ________ could be one of the biggest______ in the 21st century. Definition: Global warming refers to_____ in the Earth’s temperature that, in turn,______ climate change.

Para.2

Para.3
Para.4

Causes: Many experts insist that the blame for this global warming can mostly____.
Consequences: If we continue to produce greenhouse gases______. There will be more______ such as floodings, heat waves and droughts. Action: All governments have a responsibility to ____ and each person should_____.

Para.5

Para.1 Introduction: Human beings are changes in the Earth’s climate causing___________________________ and it is warmingcould be one of biggest believed thatglobal _____________ environmental problems in the 21st century. ______________________

Para.2 Definition: Global warming refers to an average increasein the Earth’s temperature that, __________________ in turn, _______ lead to climate change.

Para.3

Causes: Many experts insist that the blame for this global warming can be pinned on human activities mostly_________________________. Consequences: If we continue to produce in such huge quantities greenhouse gases____________________. There will be more___________ disasters such as floodings, heat waves and droughts.

Para.4

Para.5

Action: All governments have a responsibility to reduce the amount of carbon dioxide and each _________________________________ play their part person should________________.

Answer questions and get free gifts! Come on !

GO

1.By how much has the global average temperature increased in the last 100 years? 2.Are greenhouse gases necessary for life on Earth? What’s the result of too much of them?

1.By how much has the global average temperature increased in the last 100 years? Over the last 100 years, the global average temperature has increased by 1℉.

2. Are greenhouse gases necessary for life on Earth?What’s the result of too much of them? Yes ,they are. Because they trap heat in the atmosphere of the earth .Otherwise the Earth would be cold and unsuitable for life. But if there are too much of them, the temperature of the earth will rise, that is global warming.

summary
average increase in the Global warming is an _________________ Earth’s temperature, which in turn leads to _____________. climate change It is caused by ____________, human activities for example the increased industry, agriculture, the cutting down of forests , the increase in ________________ the burning of fuels. It will have transport and ___________ severe consequences , such as frequent flooding, heat waves, less fish, serious diseases, ________ melting of the polar ice and _________ the risingof sea levels.

What can we do to save the earth? On one hand , governments should reduce the amount of _____________ carbon dioxide produced by their countries. On the other hand, each person should make small changes like using ________ low-flow shower heads, taking public transports, recycling, buying energy-saving switching off lights when leaving a bulbs, ___________ room and so on. All theses small things can save our future.

GLOBAL WARMING
Questions for Journalist:
1. What is global warming? 2. What caused global warming? 3. By how much has the global average temperature increased in the last 100 years? 4. Are greenhouse gases necessary for life on Earth? 5. What can we do to help solve the problem of global warming?

Expressions for scientist: Definition: average increase in the Earth temperature Causes: human activities, industry, agriculture, deforestation, the increase in transport , the burning of fuels Results: flood, droughts, heat waves, dead fish , raising sea levels, no proper home to many animals Actions we can take:

Read the text and do Ex5,6 on your handouts


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