(共21张PPT)
UNIT 3 ENVIRONMENTAL PROTECTION
Reading and thinking
Learning objectives
After this class, the students will be able to
1. grasp the main idea and the structure of the passage
2. figure out the causes and effects of climate change
3. Speak up their opinions on climate change, realizing the great influence from human activities on it.
4. raise their awareness of environmental protection.
Activate and share
1.What is the video mainly about
Polar bears starvation
Low sea-ice level
Natural disaster: drought
Extreme weather :heatwaves
economic losses
Global warming
melting ice
the rising sea level
1.What is the video mainly about
Read for textual structure
Read the text and conclude the main idea of each paragraph.
The evidence of dramatic climate change
Para 1-2
Global warming
problems
A warming ocean and atmosphere
Melting ice and rising sea
Low sea-ice levels
Bad impact on earth’s ecology
(polar bears’ starvation)
Para 3
The causes of global warming
Q: What’s the function of the first sentence in the paragraph
What’s the main cause of global warming
Para 3
The causes of global warming
causes
Natural green house effect
Man-made green house effect
keep the earth's climate warm and habitable
cause the earth's surface temperature to rise quickly
Para 4
The effects of global warming
effects
Extreme weather
Natural disaster
examples
results
extreme rainstorms
heatwaves
cause serious damage
cost human lives
Para 5
The solution to global warming
solutions
governments
individuals
make policy
reduce carbon footprint
take appropriate
actions and measures…
seize every opportunity to educate
4. How to change a bad habit and create good ones.
3. The cycle of how habits are formed.
5. Changing habits gradually.
6. No easy way to change bad habits.
2. What a habit is.
1. Why bad teenage habits should be changed.
Exposition (说明文)
the problem
the problem
the problem
raise
analyse
solve
conclusion
problem-solving pattern (问题解决模式)
Unit 2 Reading and Thinking: Habits for a Healthy Lifestyle
Make a mind map of the text’s structure.
Read for textual structure
Global warming
problems
causes
solutions
effects
Cause-effect pattern
Paras.1&2
Para.3
Para.4
Para.5
Q1. What's the type of this text
A. News report.
B. Biography.
C. Expository essay.
D. Argumentation.
Q2. In which part of a newspaper or magazine may we find this passage
A. Entertainment
B. Economy
C. Education
D. Environment
Text pattern 说明文常见语篇模式 Structure
结构特征
1. Description 事物描述 以描述为主介绍事物或者概念
2. Problem and solution 问题解决 提出问题---分析问题---解决问题
3. Cause and effect 因果关系 剖析现象背后的原因
4. Compare and Contrast 异同比较 比较两个人或事物的相似点或差异
5. Process/ sequence 程序解说 介绍流程步骤或工作原理
说明文常见语篇模式
Create a diagram describing how it works.
Heat released back into space
Heat reflected back to Earth’s surface
Reflected sunlight
Atmosphere
Sunlight
Read for details
How dose the greenhouse effect work
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Watch and learn:what is greenhouse effect
Causes of global warming
natural
man-made
Definition
Heat from the sun enters the __________ and warms Earth’s __________ as _________-wave radiation.
Function
Keeping Earth’s warm and_____________
Definition
People produce huge amounts of_________ greenhouse gases by burning_____________.
A big problem
More heat energy is _______ in the atmosphere and causes Earth’s surface temperature to ________ quickly.
habitable
extra
fossil fuels
atmosphere
surface
short
trapped
rise
Greenhouse Effect
Read for details
What can we do to reduce our “carbon footprint” Work in pairs.
Critical thinking
Sort the garbage.
Avoid products with a lot of packaging.
Value the existing natural resources like forests.
End wasting resources.
Encourage others to conserve
Adjust our lifestyle
Reduce, reuse, recycle.
Turn off electric devices when they are not in use.
Help inform people of the danger of global warming.
Save Earth !
Critical thinking
Homework !
Individual:
Draw a mind map to review the whole passage.
Group:
Make a poster about global warming with your group members.