高中英语人教版 (2019)选择性必修 第三册Unit 3 Environmental Protection备课ppt课件

这是一份高中英语人教版 (2019)选择性必修 第三册Unit 3 Environmental Protection备课ppt课件，共24页。PPT课件主要包含了Lead in，keys，Evidence，damages，causes，Summary，warning等内容，欢迎下载使用。
By reading, explain causes and negative effects f glbal warming.
By teamwrk, present hw t slve the prblem f glbal warming in grups.
Be aware f the imprtance f cutting greenhuse gases and take effective actin t d it.
Learning bjectives:
By the end f the class, yu will be able t
Learning Objectives:
What d yu knw abut glbal warming?
The effects are destructive as fllws:The sea level t rise. Severe strms, drughts, famines, the spread f diseases, and destructin f species.Wide animals died because f starvatin.Frest fire ccurs frequently because f the extreme ht weather.
What is the graph abut? What infrmatin can yu get frm it?The graph is abut the change f glbal Surface temperature.It shws us that the glbal temperatureis rising steadily and cntinuusly.2. What happened in the picture? D yu knw what caused it?A plar bear was dead and it is “skin and bnes.”The ice is melting n the muntain.Glbal warming causes the melting f iceberg and sme plar bears Suffer frm the lack f fd.
Read the pictures
Read the text and sum up the main idea f each paragraph:
Glbal climate is changing dramatically.
An alarming case abut a bear starved t death
What is causing the increase in the glbal average surface temperature
The destructin f the rise in temperature and the warning
Further pssible changes t the glbal climate and ur duty
Read the text and answer the questins:1. What is the evidence f glbal warming?2.Why is the “natural ”greenhuse effect imprtant and necessary?3.What are the cnsequence f high greenhuse gas emissins?4.Why did the authr mentin the climate scientists’ warning?5.What is the authr’s purpse f writing the text?
Read the text and answer the questins:What is the evidence f glbal warming?Warming cean and atmsphere; melting and rising sea level; the starved plar animals; the extreme weather and natural disasters2.Why is the “natural ”greenhuse effect imprtant and necessary?Because greenhuse gases trap heat and keeps the earth warm and are the cnsequence f high greenhuse gas emissins?Peple prduce huge amunts f extra greenhuse gases and mre heat energy is trapped, causing the temperature t g up.
Read the text and answer the questins:4.Why did the authr mentin the climate scientists’ warning?Because the writer wants t warn us f the urgency f taking apprpriate actins t tackle the is the authr’s purpse f writing the text?T aruse ur awareness f the prblem f the rise f temperature and taking prper actins t address the glbal warming.
Read the text again and create a diagram describing hw the greenhuse effect wrks.
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.
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 reasn?3. Wh shuld take respnsibility t address this climate change? What shuld yu d t d t tackle it?
Grup discussin
1.What examples f extreme weather and disasters d yu knw? Make a list f them.Tsunami, flds, landslides, sandstrms, thunderstrms, earthquakes, hail, ht waves, cld waves, typhns, trnads, hail
2. D yu think it is human activity that caused glbal climate change? Give yur reasn?Yes. Human beings burn t much fssil fuels and prduce large quantities f carbn dixide, causing the temperature t g up steadily .
3. Wh shuld take respnsibility t address this climate change? It is everyne’s duty t take care f the earth and d ur part t tackle glbal warming.
Take the stairs instead f elevatr
What yu shuld d t d t tackle it?
Dn't litter
G t schl by bike instead f by car/bus
Turn ff the lights when leavingCver the pt while cking
Use handkerchief instead f facial tissue
Use basket r envirnmental basket bag instead f plastic bag;buy thins ecnmic with energy; use recycle gds r items.
watch less TV
plant mre trees
eat mre vegetable
Climate is rising.
Ptential further changes
actins t tackle the issue