外研版 (2019)必修 第二册Unit 6 Earth first背景图课件ppt

这是一份外研版 (2019)必修 第二册Unit 6 Earth first背景图课件ppt，共56页。PPT课件主要包含了内容介绍，新课导入，知识学习，讲练结合，应用实践，Homework等内容，欢迎下载使用。
学习目标：能够运用因果关系连接词熟练表达因果关系；能够运用逻辑性思维和批判性思维梳理和评判生活中的环保观点，运用新学语言复述语篇内容；能够通过自主学习了解更多先进的环保理念，增强环保意识，践行绿色生活方式。
1. Which shpping bag is mre envirnmentally friendly (环保的)? A plastic bag (塑料袋). A paper bag. Neither f these.
Lk at the questins abut “green living” and tick yur answers.
2. What shuld yu d t save energy when leaving yur hme? Turn ff a device (关掉设备). Unplug a device (切断电源). Neither f these.
3. What fd is better fr the envirnment? Fd prduced near t where yu live. Fd prduced far frm where yu live. It depends.
4. Which uses less water? Taking a bath. Taking a shwer. It depends.
♥ I think a plastic bag is mre envirnmentally friendly.♥ I think a paper bag is mre envirnmentally friendly.♥ I think neither a plastic bag nr a paper bag is envirnmentally friendly. We need t use a _________.
Yu need t use a cmplete sentence t share yur answers.
Lk at the title and think abut the meaning f it.
What’s really green?
envirnmentally friendly
Paper shpping bags are better than plastic nes. When yu turn ff a device, it stps using pwer. Eating lcal fd is gd fr the envirnment. It’s better t take a shwer than a bath.
Read the fur subheadings (副标题) in the passage, decide whether they are true r false and explain yur reasns.
♥ I think the subheading ________ is true/false, because________. ♥ The reasn why I think the subheading that ___________ is true/false is that ___________.
Read the passage quickly and check yur answers.
expand n: t add details t what yu are saying 详细阐明
Read the first paragraph, and think abut what type f writing it is.
be aware that: t realize r knw smething exists 意识到
the majrity f: mst f 大多数
What type f writing is it?
A leader/An editrial.
A leader/an editrial: a piece f writing in a newspaper giving the paper’s pinin n a subject.
What is the subject f this writing?
What is the paper’s pinin n “green truths”?
Read the first “green truth” and answer the questins.
♥ Why d peple think plastic bags are bad fr the envirnment?♥ Why are paper bags nt gd fr the envirnment? ♥ What kind f bag is a better chice?
♥ Why d peple think plastic bags are bad fr the envirnment?
► cause litter & are a danger t wild animals
► take hundreds f years t break dwn
mistake…fr: t wrngly think ne persn r thing is smene r smething else. 误以为
Smething changes as a result f a chemical prcess. 分解
► fur times as much energy as making a plastic bag
♥ Why are paper bags nt gd fr the envirnment?
Because making a paper bag uses
► up t three times the amunt f water
♥ What kind f bag is a better chice?
► A reusable bag.
reuse: t use smething again.
What else can be reused in ur daily life?
shpping bag
therms (保温杯)
Read the secnd “green truth” and answer the questins.
♥ Why des the device (设备) still use pwer when it’s turned ff?
♥ Why is the wrd “ff” put int a qutatin mark?
Because electricity cntinues t leak(泄露)frm the device even when it is turned “ff”.
Because the appliance (电气设备) is nt really ff, and it ges int stand-by mde(待机模式)and still uses pwer.
remve…frm: take smething away 将……移开
What can yu learn frm this “green truth”?
What else can we d t save energy (electricity r water)?
We need t remve ur cellphne charger (充电器) frm the pwer supply, and als unplug ther husehld appliances, fr example, washing machine, televisin, reading lamp and s n.
Read the third “green truth” and answer the questins.
♥ Why d peple think eating lcal fd is better fr the envirnment?
♥ Why is eating lcal fd nt always better fr the envirnment?
► cmmn sense: the ability t think abut things in a particular way and make sensible decisins 常识
♥ It is _________ that _________ 强调的部分
► The prductin f fd uses mst f the energy and prduces mst f the greenhuse gases.
► prduce: fd r ther things that have been grwn r prduced n a farm t be sld 农产品
► take smething int accunt: t cnsider particular facts r details when making a decisin abut smething 考虑到
Read the furth “green truth” and answer the questin.
♥ Why is it nt always better t take a shwer than a bath?
► the key is t d…去做……的关键是……
♥ What is the paper’s suggestin abut the “green truths”?
wrth ding: used t say that smething is interesting, useful, r helpful 值得做的
Read the last paragraph and answer the questin.
After yu read the passage, which f the “green truths” surprises yu mst? Give yur reasns.
♥ The “green truth” that _______________ surprises me mst, because_______________. ♥ I find the “green truth” that ______________ mst surprising, because _______________.
Think and share
Underline the causes and think abut hw t cnnect the causes and effects.
Making a paper bag uses mre energy and water than making a plastic bag. It als prduces mre greenhuse gases.
Paper bags are nt gd fr the envirnment.
What wrds can be used t cnnect the causes and the effects? Find ut the signal wrds f cause and effect frm the passage.
Find ut the signal wrds f cause and effect frm the passage:
“Green truth ” 1: because f + cause (phrase 短语)“Green truth ” 2: because + cause (clause 从句)“Green truth ” 3: therefre + effect (clause 从句)
Can yu cme up with ther signal wrds f cause and effect?
s, therefre, thus, then, as a result, cnsequently
Devices turned ff g int stand-by mde and still uses pwer,
turning ff a device wn’t stp it frm using pwer.
Since devices turned ff g int stand-by mde and still uses pwer,
Cnnect the causes and the effects.
because, if, due t the fact that,
Turning ff a device wn’t stp it frm using pwer,
devices turned ff g int stand-by mde and still uses pwer,
because, if ,due t the fact that,
Cnnect the causes and the effects in activity 3.
Chse ne “green truth” and retell it in the fllwing structure, using the wrds newly learnt.
► Start yur retelling by stating the tpic.► Describe the “green truth” in mre detail-why peple believe it’s “green”.► Explain why it is nt cmpletely true.
be aware that, take care f, the majrity f, take steps t, save energy, reduce waste, reduce pllutin, mistake fr, break dwn, reusable, turn ff, g int stand-by mde, leak frm, remve frm, cmmn sense, take int accunt
s, therefre, thus, then, as a result, cnsequently, sincebecause, if, due t the fact that
Retell ne “green truth”.
Are yu aware f any ther “green truths” that are nt true?
♥ Tpic: Are electric cars really “green”?♥ Descriptin: Electric cars run n electricity and they dn’t burn gasline at all; therefre they dn’t emit CO2, thus creating “zer emissin” (零排放).
♥ Descriptin: Althugh driving an electric car des nt cause any air pllutin, the pllutin mainly cmes frm the prductin f its battery (电池) and the electricity used t keep it running. The prductin f the electric batteries requires lithium (锂). A large amunt f energy is used n mining and prcessing this metal. Meanwhile, the electricity by which electric cars are pwered is mainly frm burning cal r gas. All f these cntribute t carbn emissins. Cnsequently, electric cars aren’t really green.
Hw “green” are yu?
What can yu d t becme “greener”?
refuse t buy ver-packaged prducts
dnate the clthes yu’ve utgrwn t thers
Search mre infrmatin abut the “green truths” n the Internet, decide n ne and write a shrt paragraph abut it.
► Start yur writing by stating the tpic.► Describe the “green truth” in mre detail-why peple believe it’s “green”.► Explain why it is nt cmpletely true.► End yur talk by encuraging thers t becme “greener”.