选择性必修 第三册Unit 3 Environmental Protection课文配套ppt课件

这是一份选择性必修 第三册Unit 3 Environmental Protection课文配套ppt课件，共22页。PPT课件主要包含了Earth，natural等内容，欢迎下载使用。
T discuss climate changeT learn t identify the style f this text and infer the writer’s purpse T learn t draw a diagramT think abut hw we can d t deal with climate change
Climate Change Requires the Wrld’s Attentin
We can see the glbal surface temperature.
Yes, it may be abut envirnment.
1 Befre yu read, lk at the graph and the picture belw and discuss these questins in grups.
1 What is the graph abut? What infrmatin yu’ll get frm it?2 Have yu ever seen the pht befre? What might be the stry behind it?
Hw t describe a prcess in a clearer way?
Yu may use a diagram t shw it!
Climate change requires the wrld’s attentin
1.Read the passage and match the main idea with each paragraph.Para.1 A. We need t d smething t reduce greenhuse gas emissins.Para.2 B. The rise in temperature has caused natural disasters.Para.3 C. Earth is getting warmer and warmer.Para.4 D. A dead plar bear was fund，which alarmed sme experts.Para.5 E. Why is Earth getting warmer and warmer?
1. What happened t the plar bear in the pht? Why did the Writer write abut it?2. Why is the “natural” , greenhuse effect imprtant and necessary?3. What are the cnsequences f high greenhuse gas emissins?4. Why did the authr mentin the climate scientists' warning?5. What is the authr’s purpse f writing this text?
They appear t starve and die. He wants us t prtect ur envirnment.
Withut it, the earth can nt sustain life.
It can lead t extreme weather and natural disasters
T prevent us frm paying a higher price.
He wants us t prtect ur envirnment
2. Read the text and answer the questins.
The ________ is getting warmer and warmer. Evidence ne: _________________________________Evidence tw: _________________________________Evidence three: _________________________________
a warming cean and atmsphere
Read paragraph ne, and fill in the blanks.
melting ice
rising sea levels
Nrway’s Arctic island f Svalbard
A plar bear died f starvatin.
Paragraph 2 intrduces an example f the increase in temperature that had an impact n Earth’s eclgy. Read it and fill in the blanks.
The bear cannt hunt fd because f lw sea-ice levels.
Greenhuse Effect
Heat frm the sun enters the atmsphere and warms Earth’s surface as shrt-wave radiatin.
keeping Earth's climate warm and habitable
Mre heat energy is trapped in the atmsphere and causes Earth's surface temperature t rise quickly.
Trap heat frm the sun t keep the Earth’s sustainable life.
Read Paragraph 3, and figure ut the reasn why earth’s temperature rising.
“Natural” greenhuse effect
“man-made” greenhuse effect
By burning fssil fuels, extra greenhuse gases cause Earth’s temperature t rise.
Cnsequences
Summarize the main idea f paragraph 4, accrding t the diagram.
Turn electrical appliances ff when nt using them. Put n mre clthes, dn’t turn up the heat. Walk r ride a bike, dn’t drive.Recycle cans, bttles, plastic bags and newspapers.Buy things made frm recycled materials.Buy prducts that use less energy.Plant trees.Talk with family and friends abut glbal warming.
A: We shall d smething abut glbal warming.
Draw a diagram t shw hw the greenhuse effect wrks
Evidence and definitin
Negative cnsequences
Pssible slutins
Climate change: greenhuse effect
4. Discuss these questins in grups 1 What examples f extreme weather and disasters d yu knw? Can yu make a list?2 D yu think climate change is the result f human activity? Give yur reasns.3 Wh d yu think shuld take respnsibility fr dealing With climate change? What can we d?
1. Write a cmpsitin with the title : Glbal warming in my eyesWhat is glbal warmingHw des it cme abutWhat harmful effects dse it causeHw t stp it2.Read mre infrmatin abut envirnmental prtectin nline, and then exchange infrmatin with their friends.