资源简介

(共28张PPT)
Unit 3
Environmental protection
Reading and thinking
Discuss climate change
Climate change requires the world’s attention
Lead-in
Pre-reading
while-reading
post-reading
Part 1 Lead-in
1. What’s happening in the photo
2.What will happen if glaciers are melting faster than before
3. Why did it happen
Rising sea levels.
The ice is melting.
Because of the global warming.
melting ice
drought
flood
no habitat
animals dying
natural disasters
coastal cities submerged
sea level rise
What other consequences may global warming bring about
famines
natural disasters
economic losses
coastal cities submerged
extreme weather
unpredictable future of human
What other consequences may global warming bring about
global warming
animals dying
Earth provides enough to satisfy every man’s needs, but not every man’s greed.
— Mohandas K. Gandhi
1.What is the difference between “needs” and “greed”
2.How do you understand the quote
3.How is it related to the theme of the unit
Part 2
pre-reading
1. What is the graph about
2. What information can you get from it
The graph is about the change of global surface temperature.
The temperature of the global surface rose about 1.2 ℃ from 1920 to 2016. The earth is becoming warmer and warmer.
1.What happened to the polar bear in the photo
2.What might be the story behind it
1.The polar bear in the photo died of starvation.
2.The story is that the polar bear starved to death because it could not find enough to eat.
What is the purpose of writing this text
The author’s purpose is to inform the readers and inspire them to do whatever they can to deal with this problem.
1. What's the type of this text
A. Essay 论文 B. Biography 传记
C. Exposition. 说明文 D. Argumentation. 议论文
2. What's its purpose
To inform readers to deal with climate change
To persuade readers to focus on limited resources
3.In which part of a newspaper or magazine may we find this passage
A.Entertainment B.Economy C.Education D.Environment
Part 3
While-reading
Para1. The influences of the rise in temperature.
Para2. The solutions to reducing greenhouse gas emissions.
Para3. An exact example of climate change.
Para4. A problem of climate change.
Para5. The causes of the increase in the global temperature.
Reading for main idea.
Read and find out the development of the passage.
problem
example
reasons
influences
solutions
phenomenon
cause
consequence
solution
[ k sp z t r ]
Expository writing
1. What’s the function of the first paragraph
A. To introduce the topic.
B. To tell us climate change has been known for decades.
C. To show the evidence of climate change.
D. To confirm that Earth is getting warmer and warmer.
2. What is the evidence of climate change
Para. 1 problem
A warming ocean and atmosphere along with melting ice and rising sea levels.
How climate change have influenced the polar bear's life
climate change
low sea-ice levels
bears could not hunt
had to travel greater distances to find food
starved to death
its dead body found
Para. 2 example
1. What’s the main idea of the third paragraph
2.Why is the “natural” greenhouse effect important and necessary
3. What are the consequences of high greenhouse gas emissions
High greenhouse gas emissions lead to more heat energy
being trapped in the atmosphere and rising temperatures.
The “greenhouse effect” has two common meanings.
Because it warms the Earth’s surface and keeps it habitable.
Para. 3 causes
Find the key precess about “greenhouse effect”.
Greenhouse effect
natural greenhouse effect
keeping Earth's climate warm and habitable
man-made greenhouse effect
causing Earth’s surface temperature to rise quickly if too much heat energy is trapped
2.Draw a mind map to show the relationship of this paragraph.
The rise in temperature
extreme weather / natural disasters
extreme rainstorms, heat waves
serious damage, costing human lives, economic losses
leads to
examples
results
1.Why did the author mention the climate scientists’ warning
Para. 4 influences
Climate scientists have warned that if we do not take appropriate actions, this warming trend will probably continue and there will be a higher price to pay.
What can we do to fight global warming
Para. 5 solutions
*Governments: make policies and take appropriate actions and measures to reduce greenhouse gas emissions
*Individuals: restrict the amount of carbon dioxide our lifestyles produce to reduce our “carbon footprint”
Part 4
Post-reading
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.
Tips:draw a diagram
Use a diagram describing how the greenhouse effect works.
Heat enters the atmosphere
Reflected sunlight
Heat reflected back to earth’surface
Heat released back into space
The greenhouse effect
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
Yes. Human beings burn too much fossil fuels and produce large quantities of carbon dioxide, causing the temperature to go up steadily .
Tsunami(海啸）, floods（洪水）, landslides（滑坡）, sandstorms（沙尘暴）, thunderstorms（雷雨）, earthquakes, hail（冰雹）, heatwaves（热浪）, cold waves（寒潮）, typhoons（台风）, tornados(龙卷风).
Why is a question left at the end
To leave readers’ deep thoughts of how to reduce greenhouse gas emissions.
Thanks

展开更多......

收起↑