课件38张PPT。Words studyUnit 4 Global WarmingReadingGlaciers(冰川)Nowadays, lots of glaciers
are melting(融化).Polar bearsBut now, they are living a miserable(悲惨) life.Maldives（马尔代夫）The sea level is rising.Maybe it will disappear one day!What has caused these phenomenons(现象)?Global warmingStep Ⅰ Lead-inWatch a video and fill in the blanks with words from below. What is global warming?
By burning(1) _______, such as coal, oil and clearing forests, we have dramatically increased the amount of (2)___________ in the atmosphere, and the (3)___________ is rising rapidly. If the warming continues, we can expect serious (4)_________.carbon dioxide consequences
fossil fuels temperatureStep ⅡPre-reading fossil fuelscarbon dioxidetemperatureconsequencesThe Earth Is Becoming Warmer
--But Does It Matter?Step Ⅲ Tasks for reading
Discuss your answers of
Task 1,2＆3 in your group.(1) What is the writing style of the passage?
Exposition
B. Argumentation
C. Narrationreport the situation of global warming and present other people's views Step Ⅲ Tasks for readingTask 1Part1
Part2
Part3
C. Introduction of global warming (1)(2-5)(6)A. How global warming comes about B. List two different attitudes towards global warmingPart4
(7)D. Whether people should do something about global warming(2) Match the main idea of each part(3) What does the passage mainly talk about?A. The cause of global warming
B. Two different attitudes towards global warming
C. It doesn’t matter that the earth is becoming warmer
D. Both A and B Task 2They show that the ___________ and the_________________ have been increasing rapidly . (1) What do the two graphs show us?temperaturecarbon dioxide content(2) What has caused this global warming?
___________________________Human activity There is no doubt that the earth is becoming warmer and that it is human activity that has caused this global warming…burning of fossil fuels(3) What is the greenhouse effect? Are greenhouse gases necessary for our earth?
______________________________Small amounts of gases in the atmosphere, like carbon dioxide, methane and water vapour, trap heat from the sun and therefore warm the earth. Para.3 Line 9Yes (4) How does global warming begin?
______________________________Global warming begins by adding huge quantities of extra carbon dioxide into the atmosphere.The problem begins when we add huge quantities of extra carbon dioxide into the atmosphere.Retell the process of global warming’s cause.extra
carbon
dioxide
greenhouse
gases
temperature
increase
fossil fuels(1) Who are the two scientists? And what are their opinions about global warming?Janice FosterGeorge Hambleygo upcatastrophevery seriouspositiveproduce a greater range of animalsTask 3(2) What is the writer’s attitude toward global warming?
A. Positive
B. Negative
C. Neutral
D. IndifferenceDoes that mean we should do nothing? Or, are the risks too great?The earth is becoming (1)_________. There is no doubt that it is (2)_____________that has caused the global warming. All scientists(3) ___________the view that it is due to the burning of (4)_________like coal , natural gas and so on. As a result, a natural phenomenon called the (5)____________has come about. Without this phenomenon, the earth would be about thirty-three degrees Celsius cooler than it is. warmerhuman activitysubscribe to fossil fuelsgreenhouse effectStep Ⅳ TestingFill in the blanks according to what we have learnt.However, the global temperature rises when we add huge (6)__________ extra carbon dioxide into the atmosphere. Charles Keeling made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997.The (7)___________ of scientists towards this rise are completely different. Some think that the trend would be a (8)____________ while some are (9).________to this view, and believe that any warming will be mild with few bad environmental (10)._________.quantities of attitudescatastropheopposedconsequencesStep Ⅳ TestingPost-reading Discussion (1)Should we do something about global warming? And why?Live a low-carbon life
Control global warming
Protect our environment (2) What can we do to control global warming in our daily life?One possible pattern: I think, as middle school students, we can make some efforts to control global warming. First,_____________.
Second,___________________. Third, ______________________.
As long as all of us make a contribution to preventing the temperature from going up, this problem will be solved one day. And the green world will return to us!Plastic bagsPaper bagsPlant treesTurn electrical appliances off1.Write a composition with the title ”Save our earth, save ourselves“ with about 100 words based on what we have learnt today.
2. Surf the Internet for more information about global warming.Thank you!floodsdroughtsfaminesTeaching plan
Teaching material: Book 6 Unit 4 The Earth Is Becoming Warmer—But Does It Matter?
Lesson type: Reading
Teaching goals:
Of knowledge:
1.to enable students to know basic scientific facts concerning global warming, scientists’ different attitudes towards it and the writer’s attitude as well.
2.to enable students to grasp some words and phrases.(carbon dioxide, fossil fuel, consequence, temperature, go up , quantities of)
Of ability:
1. to get the main idea and specific information of the passage as soon as possible.
2. to enable students to learn to think critically about the problem the writer has raised.
Of emotion
1. to enable students to learn we should conserve energy and protect the earth.
2. to?develop?students'?sense?of?cooperative?learning.?
Teaching important points
1.to?enable?students?to?learn?about?global?warming?and?to?
develop?their?reading?ability.?
2. to develop students’ sense of protecting environment
3.to?enable?students?to?talk?about their opinions about
global warming.
Teaching difficult points
1.to?enable?students?to?learn?about?global?warming?and??
develop?their?reading?ability.?
2.to?enable?students?to?talk?about?their opinions about
global warming.
Teaching methods
Tasked-based and student-centered learning methods: Group Activity, Individual Activity and Pair-work.
Teaching Aids
Multi-media, PowerPoint, blackboard and paper sheet
Teaching procedures
StepⅠ Lead-in
Ask students to look at some pictures carefully. And what has caused these phenomenons?
(Design intent: use some pictures to arouse students’ interest and introduce the topic of this unit)
StepⅡ Pre-reading
Watch a video and fill in the blanks with words from below.
carbon dioxide consequences
fossil fuels temperature
What is global warming?
By burning(1) _________, such as coal, oil and clearing forests, we have dramatically increased the amount of (2)____________ in the atmosphere, and the (3)__________ is rising rapidly. If the warming continues, we can expect serious (4) _________.
(Design intent: by watching the video, students can have a general idea of global warming, learn some words about this topic and do a preparation for reading the passage)
StepⅢ Tasks for reading
Task 1 Read the passage quickly and finish the task.
(1) What is the writing style of the passage?
A. Exposition
B. Argumentation
C. Narration
(2) Match the main idea of each part.(pay attention to the first and last sentence in each paragraph)
Part 1
(para.1)
Part 2
(para. 2 to 5)
Part 3
(para. 6)
Part 4
(para.7)
(3) What does the passage mainly talk about?
A. The cause of the global warming
B. The effects of the global warming
C. It doesn’t matter that the earth is becoming warmer
D. Both A and B
Task 2 Read Part 1 and Part 2(para.2 to 5) carefully, and finish the following four questions.
What do the two graphs show us?
They show that the ___________ and the__________ have increased
(2)What has caused this global warming?
(3)What is the greenhouse effect? Are greenhouse gases necessary for our earth?
(4)How does global warming begin?
Task 3 Read Part 3 and Part 4 carefully and complete the blanks.
(1) Who are the two scientists? And what are their opinions about global warming?
Name
Opinions
__________
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 __________ more and will
encourage____________________ .
(2) What is the writer’s attitude toward global warming?
A. Positive
B. Negative
C. Neutral
D. Indifference
(Design intent: by asking students to preview the article, they can develop their self-study ability)
StepⅣ Testing
Fill in the blanks according to what we have learnt.
The earth is becoming (1) _________. There is no doubt that it is (2) __________ that has caused the global warming. All scientists (3) _________the view that it is due to the burning of (4) _________like coal , natural gas and so on. As a result, a natural phenomenon called the (5) ___________has come about. Without this phenomenon, the earth would be about thirty-three degrees Celsius cooler than it is. However, the global temperature rises when we add huge (6) __________ extra carbon dioxide into the atmosphere. Charles Keeling made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997.The (7) ___________ of scientists towards this rise are completely different. Some think that the trend would be a (8) ____________ while some are (9) __________ to this view, and believe that any warming will be mild with few bad environmental (10) ____________.
(Design intent: by doing this task, students can review what they have learnt just now, and have a better understanding of the passage)
StepⅤ
Discussion
(1)Should we do something about global warming? And why?
(2) What can we do to control global warming in our daily life?
One possible pattern:
I think, as middle school students, we can make some efforts to control global warming.
First,____________________.Second,__________________________________.Third,___________________________.
As long as all of us make a contribution to preventing the temperature from going up, this problem will be solved one day. And the green world will return to us!
（Design intent: during the discussion, students can develop the sense of cooperative learning and voice their own opinions about global warming. And it also helps students review what they have learnt just now.）
Step Ⅵ Homework
Write a composition with the title “Save our earth, save ourselves” with about 100 words based on what we have learnt today.
2. Surf the Internet for more information about global warming.
Unit 4 Global warming
The Earth Is Becoming Warmer—But Does It Matter?
(Reading 导学案)
StepⅠ Lead-in
Look at some pictures carefully. And what has caused these phenomenons(现象)?
____________________________________________________________
StepⅡ Pre-reading
Watch a video and fill in the blanks with words from below.
carbon dioxide consequences fossil fuels temperature
What is global warming?
By burning(1) _________, such as coal, oil and clearing forests, we have dramatically increased the amount of (2)____________ in the atmosphere, and the (3)__________ is rising rapidly. If the warming continues, we can expect serious(4) _________.
StepⅢ Tasks for reading
Task 1 Read the passage quickly and finish the task.
(1) What is the writing style of the passage?
A. Exposition
B. Argumentation
C. Narration
(2) Match the main idea of each part.(pay attention to the first and last sentence in each paragraph)
Part 1
(para.1)
Part 2
(para. 2 to 5)
Part 3
(para. 6)
Part 4
(para.7)
(3) What does the passage mainly talk about?
A. The cause of the global warming
B. The different attitudes towards global warming
C. It doesn’t matter that the earth is becoming warmer
D. Both A and B
Task 2 Read Part 1 and Part 2 carefully, and finish the following four questions.
What do the two graphs show us?
They show that the ___________ and the__________ have been increasing
(2)What has caused this global warming?
____________________________________________________________________
(3)What is the greenhouse effect? Are greenhouse gases necessary for our earth?
_____________________________________________________________________
(4)How does global warming begin?
_____________________________________________________________________
Task 3 Read Part 3 and Part 4 carefully and complete the blanks.
(1)Who are the two scientists? And what are their opinions about global warming ?
Name
Opinions
____________
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 __________ more and will
encourage____________________ .
(2)What is the writer’s attitude toward global warming?
A. Positive
B. Negative
C. Neutral
D. Indifference
StepⅣ Testing
Fill in the blanks according to what we have learnt.
The earth is becoming (1) _________. There is no doubt that it is (2) __________ that has caused the global warming. All scientists (3) _________the view that it is due to the burning of (4) _________like coal , natural gas and so on. As a result, a natural phenomenon called the (5) ___________has come about. Without this phenomenon, the earth would be about thirty-three degrees Celsius cooler than it is. However, the global temperature rises when we add huge (6) __________ extra carbon dioxide into the atmosphere. Charles Keeling made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997.The (7) ___________ of scientists towards this rise are completely different. Some think that the trend would be a (8) ____________ while some are (9) __________ to this view, and believe that any warming will be mild with few bad environmental (10) ____________.
StepⅤ
Discussion
(1)Should we do something about global warming? And why?
(2)What can we do to control global warming in our daily life?
One possible pattern:
I think, as middle school students, we can make some efforts to control global warming.First,______________________________________________.Second,_______________________________________.Third,____________________________.
As long as all of us make a contribution to preventing the temperature from going up, this problem will be solved one day. And the green world will return to us!
Step Ⅵ Homework
Write a composition with the title “Save our earth, save ourselves” with about 100 words based on what we have learnt today.
2. Surf the Internet for more information about global warming.
