Unit 3 Environmental protection Reading and thinking课件 (共20张PPT，内镶嵌视频)人教版(2019)选择性必修第三册

(共20张PPT)
CLIMATE CHANGE REQUIRES THE WORLD’S ATTENTION
XB3U3
Teaching Objectives:
By the end of the class, you will able to :
1. find out the problems and causes of the earth after reading;
2. be aware of(意识） the consequences(后果）of greenhouse gases (温室气体);
3. design a poster(海报）of some solutions to the global warming by teamwork;
4. understand the structure of an exposition of a phenomenon.（现象型说明文）
Look at the graph and photos. What are they about
the warmer and warmer earth
a starving polar bear
Lead-in Identify Post-reading Assess
Before-reading While-reading Post-reading Assessing
some melting ice
Climate Change Requires The World’s Attention
Explore the title and predict
Lead-in Identify Apply Assess
Before-reading While-reading Post-reading Assessing
Divide the passage into 4 parts and match the main idea with each part.
Part 1 (Para. ____)
Part 2 (Para. ____)
Part 3 (Para. ____)
Part 4 (Para. ____)
The cause of the increase in the global average surface temperature.
The solutions to reducing greenhouse gas emissions.
The problems and a case of global climate change
The consequences of the rise in temperature.
1-2
3
4
5
cause
solutions
problems
consequences
Expository
Before-reading While-reading Post-reading Assessing
Fast-reading for structures
problems
causes
consequences
solutions
Before-reading While-reading Post-reading Assessing
What is the writing style of this text
A. Exposition(说明文）
B. Narration （记叙文）
C. Argumentation（议论文）
D. A news report （新闻报道）
a warming ocean & atmosphere
melting ice
rising sea levels(海平面）
a dead polar bear
Before-reading While-reading Post-reading Assessing
climate's getting warmer and warmer
Problems in part 1( para1&2)
Careful reading for details
The causes
The greenhouse effect
types
the “natural” one
the “man-made”one
function
cause the earth's surface to rise quickly
keep the earth's climate warm and habitable
results
Before-reading While-reading Post-reading Assessing
Causes in part 2(para.3)
What writing techniques does the author use in the paragraph
Making an explanation(下定义) and a comparison.(作比较）
Consequences(后果) in part 3(para.4)
Before-reading While-reading Post-reading Assessing
What are the consequences of global warming
Governments
Individuals
___________
Reduce our carbon footprint(碳足迹)
Educate everyone about global warming, along with its causes and impacts
Before-reading While-reading Post-reading Assessing
Make policies
Take appropriate actions and measures
Solutions in part 4 (para.5)
____________________
________________________
__________________________
What actions can we take to reduce our carbon footprint and raise people’s awareness of protecting the world
Critical thinking
Before-reading While-reading Post-reading Assessing
Director组员任务分配
Reporter代表小组上台
展示作品
Student B:
Writer
书写海报内容
Student C:
Student D:
Designer
设计海报内容
Student A:
Design a poster of a low-carbon lifestyle in groups.
Before-reading While-reading Post-reading Assessing
Designer
设计海报内容
Before-reading While-reading Post-reading Assessing
assessment criteria(评价标准) points
language There are no grammar mistakes 3
content The solutions are practical and feasible(可行的). 4
design The design of the poster is attractive. 3
Your advice for the poster: 2 Design a poster to raise people ’ awarenesss
use less tissue(纸巾）, regain handkerchief（手帕）
forest protection
Turn off light, switch, pull the plug if not use.
plant trees
walk or cycle to work
Before-reading While-reading Post-reading Assessing
What have I learnt today
1 What is the problem in this passage
2 What are the causes of the problems
3 What are the consequences of the global warming
4 What are the solutions to this problem
se4 quencesconquconsequences
Before-reading While-reading Post-reading Assessing
problems
causes
consequences
solutions
Assignment :2022年高考英语全国甲卷阅读理解D篇
Try to analyze（分析）this exposition and finish the exercises.
Antarctica’s Melting Problem

Black carbon,the dark,dusty pollution that comes from burning fossil fuels,has settled in locations where tourists and researchers spend a lot of time,scientists found.Even the smallest amount of the dark pollutant can have a significant impact on melting because of its very low reflectiveness:things that are light in color,like snow,reflect the sun's energy and stay cool;things that are dark,like black carbon,absorb the sun's energy and warm up.
“The snow albedo(反射率)effect is one of the largest uncertainties in regional and global climate modeling right now,”Alia Khan,a snow and ice scientist at Western Washington University,told CNN.“That’s one of the motivations for the study,to quantify the impact of black carbon on regional snowmelt,which is important for quantifying the role of black carbon in the global loss of snow and ice.”
“Antarctica is sitting there pretty much silently all year.But,if it weren’t there,in the state that it is meant to be,the balance that we have in the climate system will no longer be,”Marilyn Raphael,a geography professor said.“Antarctica’s sea ice is also important to maintain a balance in atmospheric circulation,”he added.As waters get warmer,some Antarctic creatures are finding their homes more and more unlivable.
“Everything we do has consequences,”Raphael said.“We need to educate ourselves about those consequences,especially in systems that we know relatively little about.We have to be careful that we don’t upset the climate balance.”

1.Why can the smallest amount of black carbon have a huge impact on melting
A.It is highly reflective.
B.Its dark color absorbs heat.
C.It produces vast energy.
D.It causes much pollution.
2. According to Alia,which of the following is one reason for conducting the study
A.To measure the impact of black carbon on melting.
B.To quantify the cost of battling against climate change.
C.To remove the uncertainties of global warming effects.
D.To urge people to pay more attention to the melting problem.
3. What is the fourth paragraph mainly about
A.The change caused by Antarctic melting.
B.The methods to stop Antarctic ice melting.
C.The significance of Antarctica being in its state.
D.The sufferings Antarctic creatures are experiencing.
4. What does Raphael advise people to do
A.Reduce tourist numbers. B.Face the consequences.
C.Acquire professional education. D.Stop disturbing the climate.
Earth provides enough to satisfy every man’s needs, but not every man’s greed.
— Mohandas K. Gandhi
地球所提供的物质财富足以满足每个人的需求，却不足以满足每个人的贪欲。
——莫罕达斯·卡拉姆昌德·甘地
Thank you !