高中英语人教版 (2019)选择性必修 第一册Unit 5 Working the Land教学课件ppt

这是一份高中英语人教版 (2019)选择性必修 第一册Unit 5 Working the Land教学课件ppt，共30页。PPT课件主要包含了natural 等内容，欢迎下载使用。
T understand the differences between chemical and rganic farming and their advantages and disadvantages;T learn abut the authr's writing techniques;T learn abut the structure f argumentative essay; T write an essay t express yur views n chemical farming r rganic farming.
What is the substance that is put n the sil t make plants grw?It is fertilizer.
What kind f fertilizers d farmers use?
Chemical fertilizers
Natural waste frm animals
T prtect the crps, farmers have t kill ff the harmful pests.
What is the chemical used fr killing pests, especially insects?
Pesticides.
Organic Farming
Organic farming is simply farming withut using any chemicals.
Chemical r rganic farming?
Which tmates d yu prefer?
5 yuan / kg
30 yuan / kg
Nrmal tmates
Organic tmates
Read the text “Chemical versus rganic farming” and then answer the fllwing questins.
1. Why did many farmers welcme the intrductin f chemical farming?
Because it is a great way t fight crp disease and increase prductin.
2. What cncerns many peple abut the use f pesticides?
Pesticides can damage the land by killing nt nly harmful bacteria and insects, but als helpful nes. In additin, these chemicals can stay in the sil and undergrund water surces fr a lng time, which affects the crps grwn n the land and animals and humans wh digest them.
3. What is ne prblem with the use f chemical fertilisers?
Crps grwn with chemical fertilisers usually grw t fast t be rich in nutritin and they ften have less flavr as well.
4. Hw is rganic farming different frm chemical farming?
5. Why d rganic farmers change the kind f crp grwn in a field every year?
Because different kinds f crps put imprtant minerals back int the grund, making it ready again fr the next batch f crps.
6. What is the gal f using rganic farming methds? D yu think it can be reached? Why r why nt?
The gal f using rganic farming methds is t grw gd fd while aviding damage t the envirnment r t peple’s health.There is still a lng way t reach the gal because rganic farming cannt serve the high demand fr fd arund the wrld.
Match the main ideas (A-D) belw with the paragraphs.
A What rganic farming is B Why man-made chemicals are still used in farming C Organic methds fr prducing rich silD The prblems with chemical farming
Para. 1-2Para. 3Para. 4Para. 5
Cmplete the sentences in the tables.
bacteria and insects
damage they cause t peple and the envirnment
grw t fast
waste frm animals
change the kind f crp
every year
different depths
need/demand fr fd arund the wrld
The authr uses sme cnnectives when explaining the details. Find and underline them. Then think abut what they add t the text. Can yu name mre cnnectives accrding t different classes?
Cnnectives in the text: and, als, but, while, hwever, fr example, fr instance, in additin, in fact, as fr, because, therefre
Find the subject clauses used in the text and underline them. Then make yur wn sentences n the theme f chemical and rganic farming .
① Over time, hwever, what sme scientists have fund is that their lng-term use can smetimes harm bth the land and peple’s health.
② Why different crps are grwn is because they put imprtant minerals back int the grund, making it ready again fr the next batch f crps.
③ What keeps them frm ding s is the fact that chemical farming serves the high demand fr fd arund the wrld.
Discuss these questins in grups:
• Is the authr f the passage fr r against rganic farming? Hw d yu knw?• What ther disadvantages f chemical farming did the authr nt list？
Write an argumentative essay giving yur pinin n chemical r rganic farming.
• Hw might the fllwing items be prblems and hw imprtant are they fr rganic farming? natural animal waste used as fertilizer higher cst f prducing fd greater effrt required t farm• What ther disadvantages f rganic farming can yu think f?
Decide tpic and cme up with three main pints t supprt yur pinin, and then add at least ne detail t supprt each main pint. Cmplete the utline belw.
Use yur utline t write a shrt essay giving yur pinin n the tpic.
1. Use the checklist t help yu review yur partner’s draft.
Exchange yur draft with a partner.
√ Des the writer d a gd jb f expressing his/her pinin?√ Des each paragraph have ne main idea?√ Des each paragraph have at least ne detail t supprt its main idea?√ Des the writer sequence the pints in a lgical rder? Are there any cnnectives in the essay?
√ Des the writer d a gd jb persuading yu t accept his / her pinin？√ Des the writer use crrect grammar, punctuatin, and spelling?
2. Take yur draft back and revise it.
3. Share yur essay with the rest f the class.
Finish yur essay and revise it based n the feedback.