选择性必修 第三册Unit 3 Environmental Protection示范课课件ppt

这是一份选择性必修 第三册Unit 3 Environmental Protection示范课课件ppt，共25页。
1. What can yu see in the picture?2. What will happen if glaciers are melting faster than befre?
A large piece f ice breaking ff a large glacier r ice sheet.
Rising sea levels. A dramatic change in the glbal climate. Have an impact n Earth’s eclgy.
natural disasters
ecnmic lsses
castal cities submerged
extreme weather
unpredictable future f human
animals dying
What cnsequences may climate change bring abut?
climatechanges
Earth prvides enugh t satisfy every man’s needs, but nt every man’s greed.— Mhandas K. Gandhi
What is the difference between “needs” and “greed”?Hw d yu understand the qute? Hw is it related t the theme f the unit?
What is the graph abut? What infrmatin can yu get frm it?What`s the authr`s purpse f using the graph and the pht?
Pre-reading
Lk at the graph. What is it abut? What infrmatin can yu get frm it?What can yu see in the pht? What might be the stry behind it?
The temperature f the glbal surface rse abut 1.2 ℃ frm 1920 t 2016. The earth is becming warmer and warmer.
What effects may be caused by the glbal warming?
skin and bnes瘦得皮包骨
The plar bear (北极熊) may died fr lacking fd.
1. What's the type f this text?A. Essay 论文 B. Bigraphy 传记C. Expsitin. 说明文 D. Argumentatin. 议论文2. What's its purpse?T infrm readers t deal with climate change T persuade readers t fcus n limited resurces\3. In which part f a newspaper r magazine may we find this passage?A. Entertainment B. Ecnmy C. Educatin D. Envirnment
Para1. The influences f the rise in temperature.Para2. The slutins t reducing greenhuse gas emissins.Para3. An exact example f climate change. Para4. A prblem f climate change.Para5. The causes f the increase in the glbal temperature.
Reading fr main idea.
Read the text and find ut the develpment f the passage.
Reading fr the details.
Reading fr the details
(Para1):A prblem
a warming cean & atmsphere
melting ice
rising sea level
Climate’s is getting warmer and warmer
Climate change
lw sea-ice levels
bears culd nt hunt
had t travel greater distances t find fd
starved t death
its dead bdy fund
A plar bear’s dead bdy was fundStarved t deathLw sea-ice levelsClimate changeThe bear culd nt hunt sealsHad t travel greater distance t find fd
Para2.Put the fllwing sentences int the right rder.
What is causing the increase in the glbal average surface temperature?
(Para3): The causes
Greenhuse effect
_________greenhuse effect
____________greenhuse effect
Functin(作用):
“Man-made”
A big prblem:
keeping Earth's climate warm and habitable
causing Earth’s surface temperature t rise quickly
Diagrams are very useful tls that can be used t brainstrm idea, map ut prcesses, shw cause and effect relatinships, explain a new idea f cncept, and s n. When yu read an essay abut scientific issues, yu can try drawing a diagram, which will nt nly allw yu t visualize the prblems mre clearly but als can help demnstrate yur creative thinking and prblem-slving.
What are the benefits f using diagrams?
A diagram describing hw the greenhuse effect wrks
(para4): The influences结果
What are the cnsequences f glbal temperature rise? Finish the mind map belw.
The rise in temperature
serius damage, csting human lives, ecnmic lsses
extreme weather/ natural disasters
extreme rainstrms, heat waves
Individuals
make plicies take apprpriate actins and measures t reduce greenhuse gas emissins
restrict the amunt f carbn dixide ur lifestyles prduce t reduce ur “carbn ftprint”
(Para5): The slutins
1.What examples f extreme weather and disasters d yu knw? Make a list f them.2. D yu think it is human activity that caused glbal climate change? Give yur reasns?
1.What examples f extreme weather and disasters d yu knw? Make a list f them.
2.D yu think it is human activity that caused glbal climate change? Give yur reasns?
Yes. Human beings burn t much fssil fuels and prduce large quantities f carbn dixide, causing the temperature t g up steadily .
Tsunami(海啸）, flds（洪水）, landslides（滑坡）, sandstrms（沙尘暴）, thunderstrms（雷雨）, earthquakes, hail（冰雹）, heatwaves（热浪）, cld waves（寒潮）, typhns（台风）, trnads(龙卷风).
What will yu d t help?
1.graph 图表/曲线图 diagram 几何图解/示意图 table 列表/一览表2. emissin n. 排放物; 散发物; 排放 pl：emissins emit v. 发出; 射出; 散发同义短语：give ff/ut 发出(光,热,气体）3.melt (melted) 融化,软化 a melting pt f different natinalities:多民族的大熔炉4. starve vi. & vt. (使)挨饿; 饿死 starvatin n. (be)starve(d) t death 饿死
5. seal n. 海豹/印章 v.密封 eg：He brke the wax seal and unrlled the n. 生态; 生态学 eclgist 生态学家 bilgy n. 生物学; 生态学 bilgist 生物学家 psychlgy n.心理学 7.release vt. & n. 排放; 释放; 发布 释放
8. habitable adj. 适合居住的habitat n.(动植物的)栖息地 habit n. 习惯; 癖好9.fuel n.燃料；刺激性言行 add fuel t the fire/flames:火上浇油10.cmprehensive adj.全部的;所有的； cmprehensin n.理解力11.restrict v.限制 restricted adj 受限的 restrictin n.限制(法规,约束) 把...限制在... restrict neself 限制自己在...