(共17张PPT)
新人教版选择性必修 Book 3
Reading and Thinking P26-27
Unit 3 ENVIRONMENTAL
PROTECTION
Earth provides enough to satisfy every man’s needs, but not every man’s greed.
1. What can you see in the picture
2. What is the cause of this phenomenon
Global warming
全球变暖
melting glacier
Teaching objectives:
By the end of this period, you will be able to
1. know about the climate change and summarize the main idea of each paragraph;
2. learn about the “greenhouse effect” and create a diagram describing how it works;
3. analyse the consequences of climate change and enhance the awareness of environmental protection;
4. voice their personal opinions about how to deal with climate change.
Watch and Talk
1.Choose the extreme weather and disasters(灾难) mentioned in the pictures.
A. sea level rise B. fire
C. tsunami 海啸 D. flood
E. heatwave F. volcanic eruption火山爆发
G. drought 干旱 H. storm
sea level rise
flood
heat wave
storm
Lead-in
2.What type of writing is this passage
A. Argumentative writing(议论文)
B. Narrative writing(记叙文)
C. Expository writing(说明文)
D. Advertising writing(广告)
本文是一篇说明文。说明文是客观说明事物的一种文体,以解说或介绍事物的形状、性质、成因、构造、功用、类别等为主要内容。说明文主要通过对客观事物或事理的介绍说明,达到以知识教人的目的,因此说明文以客观、准确为基本要求,强调科学性和客观性。
What is the graph about What information can you get from it
the change in the Global Surface Temperature between 1920 and 2016.
Temperature Anomaly
shows how much the temperature has risen above what it would usually be at a base level.
Before-reading
Task 1(任务一):Read for the main idea and the structure.
Part 1:
(para.1-2 )
Part 2:
(para. 3)
Part 3:
(para. 4)
Part 4:
(para. 5)
The evidence(证据) of dramatic climate change that had an impact on Earth’s ecology
The causes(原因) of the increase in the global average surface temperature
The consequences(结果) of the rise in temperature
The solutions(解决方法) to reducing greenhouse gas emissions
Match the main idea with each part.
Fast-reading
Evidence
Cause
Consequences
Solutions
Activity2:Read for the main idea and the structure.
Task 2(任务二):Read for details
Evidence (para.1-2)
The ________ is getting warmer and warmer.
Evidence 1:
Evidence 2:
Evidence 3:
Earth
a warming ocean and atmosphere
melting ice
rising sea levels
climate
change
Evidence 4:
a dead polar bear
Careful-reading
Read for details
Causes (para.3)
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 ________ energy is trapped in the atmosphere and causes Earth’s surface temperature to ________ quickly.
habitable
extra
fossil fuels
atmosphere
surface
short
heat
rise
Greenhouse Effect
Read the part again and create a diagram describing how the greenhouse effect works.
Draw a diagram
Diagrams are very useful tools that can be used to brainstorm ideas, map out processes, show cause and effect relationships, explain a new idea or 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 visualise the problems more clearly but also can help demonstrate your creative thinking and problem-solving.
Read paragraph 3 and create a diagram describing how the greenhouse effect works.
Heat released back into space
Heat reflected back to Earth’s surface
Reflected sunlight
Atmosphere
Sunlight
Read for details
Consequences (para. 4)
What are the consequences of the global temperature rise
consequences
not only
.
but also
.
extreme 13. and 14. causing deaths and economic losses
extreme weather
natural disasters
causing serious damage
costing human lives
rainstorms
heatwaves
Read for details
solutions (para.5)
solutions
governments
make policies
take appropriate actions and measures
individuals
reduce our “carbon footprint” by…
educate everyone about global warming
In 2013,many people 1. (shock) by a news photo of a dead polar bear which appeared to have starved and died.Experts claimed that low sea-ice levels 2. (cause) by climate change meant the bear could not hunt seals as before,so it had to travel greater distance 3. (find) food.Then what is causing the increase in the global average surface temperature scientists often mention a key climate process called the “greenhouse effect”,
4. has two common meanings:the “natural” greenhouse
were shocked
caused
to find
课文语法填空
which
Post-reading
Task 3(任务三)
练习
effect and the “man-made” greenhouse effect.The “man-made” greenhouse effect has now become 5. big problem.There is strong and comprehensive evidence 6. the rise in temperature has led to an increase in extreme weather and natural disasters .In fact,news reports are 7. (frequent) broadcast about extreme rainstorms and heatwaves 8. (cause) deaths and economic losses.We as individuals can reduce our “carbon footprint” by
9. (restrict) the amount of carbon dioxide our lifestyles produce.It is our responsibility 10. (seize) every opportunity to educate everyone about global warming.
a
that
frequently
causing
restricting
to seize
Homework
世纪金榜
课时过程性评价P142页
分层作业
80分(参考上学期期末)以下同学做P142页基础全面练Ⅰ.单词拼写和Ⅱ.语法填空;
80分以上同学做P143页综合应用练:阅读理解A、B篇.