资源简介

(共23张PPT)
Part 1 : Reading and Thinking
Discuss Climate change
Unit 3 ENVIRONMENTAL PROTECTION
01
02
03
By reading, explain causes and negative effects of global warming.
By teamwork, present how to solve the problem of global warming in groups.
Be aware of the importance of cutting greenhouse gases and take effective action to do it.
By the end of the class, you will be able to
Learning Aims
What do you know about global warming
The effects are destructive as follows:
The sea level to rise.
Severe storms, droughts, famines, the spread of diseases, and destruction of species.
Wide animals died because of starvation.
Forest fire occurs frequently because of the extreme hot weather.
Lead in
What is the graph about What information can you get from it
The graph is about the change of global
Surface temperature.
It shows us that the global temperature
is rising steadily and continuously.
2. What happened in the picture Do you know what caused it
A polar bear was dead and it is “skin and bones.”
The ice is melting on the mountain.
Global warming causes the melting of iceberg and some
polar bears Suffer from the lack of food.
Before you read, look at the graph and the picture below and discuss these questions in groups.
2. What is the graph about What information can you get from it
1
Pre-reading
temperature anomaly
温度距平值是某一系列数值中的某一个数值与平均值的差，分正距平和负距平。平均气温距平就是一系列平均气温（日平均气温、月平均气温等）与总平均气温的差值。平均气温距平增高就是说明这个差值增大了，相应时间段内的温度出现了异常。
Earth is getting warmer and warmer.
3. What happened to the polar bear
Pre-reading
A:The polar bear appeared to have starved to death because it could not find enough to eat.
Before you read, look at the graph and the picture below and discuss these questions in groups.
1
4.Why the author write about it
Pre-reading
A: Because it could show
one of effects of rising temperatures due to climate change.
Before you read, look at the graph and the picture below and discuss these questions in groups.
1
Read & Think:
paragraphs and their main idea
Pre-reading
？
Earth is getting warmer and warmer & evidence.
Para.1
The evidence (alarming cases) of climate change
Para.2
The cause of rising temperature
Para.3
The effect of rising temperature
Para.4
Solutions to reducing greenhouse gas emission
Para.5
Read & Think:
The structure and text type
Pre-reading
？
evidence
Para.1
evidence
Para.2
cause
Para.3
effect
Para.4
solutions
Para.5
phenomena
Exposition writing
Read the text and answer the questions:
1.What is the evidence of global warming
2.Why is the “natural ”greenhouse effect important and necessary
3.What are the consequence of high greenhouse gas emissions
4.Why did the author mention the climate scientists’ warning
5.What is the author’s purpose of writing the text
Read the text and answer the questions:
What is the evidence of global warming
Warming ocean and atmosphere; melting and rising sea level; the starved polar animals; the extreme weather and natural disasters.
2.Why is the “natural ”greenhouse effect important and necessary
Because greenhouse gases trap heat and keeps the earth warm and habitable.
3.What are the consequence of high greenhouse gas emissions
People produce huge amounts of extra greenhouse gases and more heat energy is trapped, causing the temperature to go up.
4.Why did the author mention the climate scientists’ warning
Because the writer wants to warn us of the urgency of taking appropriate actions to tackle the issue.
5.What is the author’s purpose of writing the text
To arouse our awareness of the problem of the rise of temperature and taking proper actions to address the global warming.
Read the text again and create a diagram describing how the greenhouse effect works.
Diagrams are very useful tools that can be used to brainstorm idea, map out
processes, show cause and effect relationships, explain a new idea of concept, and
so on. When you read an essay about scientific issues, you can try drawing a
diagram, which will not only allow you to visualize the problems more clearly but
also can help demonstrate your creative thinking and problem-solving.
Read para.1-2 & Think:
Use a mind map to list the evidence of climate change
While-reading
1
Climate change
Low sea-ice levels
Bears could not hunt
Its dead body found
Starved to death
Had to travel longer distance to find food
Read para. 3 & Think:
2
While-reading
1. Why is the “natural” greenhouse effect important and necessary
A: The “natural” greenhouse effect is important because it warms the Earth's
surface and keeps it habitable.
A: High greenhouse gas emissions lead to
more heat energy being trapped in the atmosphere and rising temperatures.
Read para. 3 & Think:
2. What are the consequences of high greenhouse gas emissions
2
While-reading
3. Why did the author mention the climate scientists' warning
A: The author mentioned the climate scientists' warning because he/she wants to know the importance of environmental protection and use warnings to catch people’s attention.
Read para.4 & Think:
While-reading
3
A: The author’s purpose is to appeal to people’s awareness of environmental protection and inspire us to take action/measures.
Read para.5 & Think:
While-reading
4
4. What is the author's purpose of writing this text
1.What examples of extreme weather and disasters do you know Make a list of them.
2. Do you think it is human activity that caused global climate change Give your reasons
3. Who should take responsibility to address this climate change What should you do to do to tackle it
Group discussion
1.What examples of extreme weather and disasters do you know Make a list of them.
Tsunami, floods, landslides, sandstorms, thunderstorms, earthquakes, hail,
hot waves, cold waves, typhoons, tornados, hail.
2.Do you think it is human activity that caused global climate change Give your reasons
3. Who should take responsibility to address this climate change
Yes. Human beings burn too much fossil fuels and produce large quantities of carbon dioxide, causing the temperature to go up steadily .
It is everyone’s duty to take care of the earth and do our part to tackle global warming.
A: The author’s purpose is to appeal to people’s awareness of environmental protection and inspire us to take action/measures.
Read para.5 & Think:
While-reading
4
4. What is the author's purpose of writing this text
Post-reading
Post-reading
What else can we do to reduce climate change

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