1. Unit 4 Global warming Period 1

2. Unit 4 Study aims and demands  Topic: global warming; pollution; importance of protecting the earth  Words: compare, graph, phenomenon (pl. phenomena), fuel, quantity, per, data, catastrophe, climate, consequence, state, range, glance, widespread….  Function: agreement & disagreement; blame and complaint.  Grammar: the use of “it”

3. Unit 4 Energy resources  Do you know any kind of energy resource? Talk with your neighbors and write down as many as you can. Less than 1 min for you only.  Check your answers and think whether they are renewable or non-renewable.

4. Unit 4 Windmills, renewable. What? Renewable?

5. Unit 4 What? What kind? Renewable? A coal power station, non-renewable.

6. Unit 4 What? What kind? Renewable? An oil refinery( 精炼厂 ), non-renewable.

7. Unit 4 What? What kind? Renewable? A nuclear power plant, non-renewable.

8. Unit 4 What? What kind? Renewable? Solar panels, renewable.

9. Unit 4 What? What kind? Renewable? A hydro-electric dam, renewable.

10. Unit 4 Guess it!  Uranium Ore ( 铀矿石 )  The element uranium does not occur in pure form in nature but is found in minerals such as carnotite （钒钾铀矿）, pictured here.

11. Unit 4 What source of energy?  Geysers( 间歇泉 )

12. Unit 4 Geothermal ( 地热的 ) Energy Plant

13. Unit 4 Thermal( 温泉的 ) Region, Iceland

14. Unit 4 Non-renewable Renewable  Coal  Oil  Natural gas  Uranium  Wind (wind power)  Sun (solar energy)  Water (hydro-electric power)  Plant waste (biomass energy)  Hot springs or geysers (geothermal energy)  The sea (tidal energy) Fossil fuels

15. Unit 4 What are fossil fuels?  Ancient animal and plant material below the surface of the earth with a high carbon content, such as coal, oil and natural gas, which can be burnt to produce energy. Also known as non-renewable energy because once they are used they have gone forever; they cannot be renewed.

16. Unit 4 What about the weather?  9 ℃ / 14 ℃ We need…

17. Unit 4 The sun.

18. Unit 4 How about the plants?

19. Unit 4 If lack of solar energy, the plants… Greenhouse

20. Unit 4 Greenhouse gases!  What are greenhouse gases?  What’s greenhouse effect?

21. Unit 4

23. Read the passage quickly…  Who wrote? What’s the name of the magazine?  What are the names of the three scientists mentioned?  Is the global warming terrible?  What are the two graphs about?  What’s the main topic of the article?

24. Unit 4  Who wrote? What’s the name of the magazine?  Sophie Armstrong. “Earth Care”.  What are the names of the three scientists mentioned?  Dr Janice Foster, Charles Keeling, George Hambley.

25. Unit 4  Is the global warming terrible?  Different.  What are the two graphs about?  The first graph shows the temperature of one degree Fahrenheit between 1860-2000. The Second graph shows the carbon dioxide content in the atmosphere from 1957-1997.

26. Unit 4  What’s the main topic of the article?  Global warming/ the warming of the earth.

27. Unit 4 True or false!  The temperature last century didn't increase much.  Everyone believes that global warming is caused by the activities of humans.  Janice Foster believes that global warming is caused by burning fossil fuels.  Natural gas is a greenhouse gas.  Carbon dioxide is a byproduct of burning fossil fuels. × × × √ √

28. Unit 4  People accept Charles Keeling's data because he took accurate measurements.  Flooding could be one of the effects of future global warming.  George Hambley believes scientists are just guessing about the effects of global warming. √ √ √

29. Unit 4  George Hambley is worried about the effects of carbon dioxide on plant growth.  It is clear what the effects of global warming will be. × ×

30. Unit 4 Read for the details.  What’s the main idea of the passage? The __________ have different ideas on whether it __________ when the earth is becoming __________. scientists matters warmer

31. Unit 4 Parts.  Part 1( Para 1):  There is a fierce debate over what has caused this global warming.  Part 2 (Para 2-7)  Some scientists think that global warming could be serious.  Part 3 (Para 8)  Some think that we should not worry much about global warming.

32. Unit 4 Parts.  Part 4 (Para 9):  No one knows what the effects of global warming will be.

33. Unit 4 Yes or no?  Does Sophie Armstrong support a clear opinion?  No. he doesn’t state it clearly.  Does George Hambley believe that we should worry much about the global warming?  No, he doesn’t.

34. Unit 4 Choices. 1. Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977? A. Dr. Janice Foster. B. Charles Keeling. C. George Hambley. D. Sophie Armstrong. B

35. Unit 4 2. "But there are some very different attitudes among scientists towards this issue.“ "Issue" here means the same as the one in________. A. I bought the new stamp the day of its issue. B. They are talking about one of the key issues in the election campaign. C. The government is expected to issue a statement about the election. D. The magazine has 12 issues each year. B

36. Unit 4 3. The author probably agrees that ________ A. actually global warming is good for man. B. we should do nothing about the global warming. C. catastrophes will happen if the globe keeps on warming. D. a lot remains to be found out about the effects of global warming. D

37. Unit 4 The different ideas between Dr. Janice Foster & George Hambley Dr. Janice FosterGeorge Hambley Carbon dioxide has caused the global temperature to __________. An increase of five degrees would be a ____________ and could be ______________. More carbon dioxide is a __________ thing, which makes crops __________ and will en- courage ____________________. go up catastrophe Very serious positive produce a greater range of animals

38. Unit 4 Homework assignment  Prepare the language points of this passage and underline the important ones.  After remembering the vocabulary, do the exercise on Page 28.