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人教版 (2019)选择性必修 第一册Unit 5 Working the Land授课ppt课件
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这是一份人教版 (2019)选择性必修 第一册Unit 5 Working the Land授课ppt课件，共50页。PPT课件主要包含了Warm-up，common，Main idea，Detail，Benefit，Problem，Solution，Signposts，Review，Opinion等内容，欢迎下载使用。
Learning bjectives
In this class, yu will
wrk ut the cntent, structure and language features f the text；write yur pinin in an essay abut chemical farming r rganic farming.
What des the picture shw?
Where?What?Why?…
CHEMICAL VERSUS ORGANIC FARMING
Pre-reading: predictin
Read the text, check yur predictin and answer the questins:What is chemical farming?What is rganic farming?
While-reading: Activity 1
What is chemical farming?
Chemical farming is farming using chemical pesticides and artificial fertilizers.
Chemical pesticides and artificial fertilizers have been in widespread use in farming since the middle f the 20th century. (Paragraph 1)
What is rganic farming?
Organic farming is simply farming withut using any chemicals.
Read the text, and answer the questins n page 56.
1. Why did many farmers welcme the intrductin f chemical farming?2. What cncerns many peple abut the use f pesticides?3. What is ne prblem with the use f chemical fertilizers?
While-reading: Activity 2
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? 6.(1) What is the gal f using rganic farming methds? (2) D yu think it can be reached? Why r why nt?
1. Why did many farmers welcme the intrductin f chemical farming?
Many farmers welcmed them as a great way t fight crp diseases and increase prductin.
2. What cncerns many peple abut the use f pesticides?
Their lng-term use can smetimes harm bth the land and peple’s health.
Over time, hwever, what sme scientists have fund is that their lng-term use can smetimes harm bth the land and peple’s health.（Paragraph 1）
3. What is ne prblem with the use f chemical fertilizers?
Crps grwn with them usually grw t fast t be rich in nutritin.
4. Hw is rganic farming different frm chemical farming?
Organic farming is simply farming withut using any chemicals. Organic farmers fcus n keeping their sil rich and free f disease thrugh natural means.
5. Why d rganic farmers change the kind f crp grwn in a field every year?
Different crps are grwn because they put imprtant minerals back int the grund, making it ready fr the next batch f crps.
6. (1) What is the gal f using rganic farming methds?
The gal f using rganic farming methds is t grw gd fd while aviding damage t the envirnment r t peple’s health.
6. (2) D yu think it can be reached? Why r why nt?
Yes, I think this gal can be reached. Farmers wrked fr centuries withut using any kinds f chemicals and withut harming the envirnment, and the fd they prduced was just fine.
Match the main ideas (A-D) belw with the paragraphs. Then cmplete the sentences in the table. (P56)
While-reading: Activity 3
Chemical pesticides and artificial fertilizers have been in widespread use in farming … Over time, hwever, what sme scientists have fund is that their lng-term use can smetimes harm bth the land and peple’s health. Fr example, … they ften have less flavr as well.
Paragraph 1-2
D The prblems with chemical farming
Pesticides can kill helpful bacteria and insects.Sme pesticides have been prhibited because f the damage they cause.Crps grwn with chemical fertilizers usually grw t fast t be full f nutritin.
Paragraph 3
A What rganic farming is
Many rganic farmers use natural waste frm animals as fertilizer.
Paragraph 4
C Organic methds fr prducing rich sil
They ften change the kind f crp grwn in each field every year.They als plant crps that use different depths f the sil t help keep it rich.
Paragraph 5
B Why man-made chemicals are still used in farming
Organic farming is nwhere near being able t meet the high demand fr fd arund the wrld.
Read the text again and cmplete the table belw with the help f the signpsts in it.
While-reading: Activity 4
Chemical farming
fight crp diseasesincrease prductin (serve the high demand fr fd arund the wrld)
1. pesticide—smetimes harm land and peple’s healthkill helpful bacteria and insectsstay fr a lng time and affect crps, animals and peple 2. chemical fertilizer—nt rich in nutritin and have less flavr
switch t rganic farming
Chemical pesticides and artificial fertilizers have been in widespread use in farming since the middle f the 20th century. When they were first intrduced, many farmers welcmed them as a great way t fight crp disease and increase prductin. Over time, hwever, what sme scientists have fund is that their lng-term use can smetimes harm bth the land and peple’s health.
Paragraph 1
Paragraph 2
Fr example, pesticides can damage… but als helpful nes. In additin, these chemicals … fr a lng time. This affects the crps … and, in turn, the animals and humans wh digest them. In fact, sme pesticides like DDT … As fr chemical fertilizers, … They may lk beautiful n the utside, but inside … and they ften have less flavr as well.
Organic farming
keep sil rich and free frm disease thrugh natural means
natural waste frm animals as fertilizerchange the kind f crp in each field every yearplant diverse crps using different depths f sil
unable t serve the high demand fr fd arund the wrld
There is still a lng way t find a suitable slutin.
As an alternative, sme farmers have switched t rganic farming, and many custmers have turned t rganic fd when they shp at the lcal grcery. … Fr example, many rganic farmers use natural waste frm animals as fertilizer. This makes the sil in their fields richer in minerals. It als keeps the air, sil, water and crps free f chemicals.
smething ffering the pssibility f different chices
Organic farmers als use many ther methds t prduce rich sil. They ften change the kind f crp grwn in each field every year. Fr instance, they may grw crn r wheat … Organic farmers als plant diverse crps that use different depths f sil t help keep it rich. Fr example, peanuts …
Sme peple … What keeps them frm ding s is the fact that chemical farming serves the high demand fr fd arund the wrld. Organic farming is nwhere near able t meet that need. Therefre, there is still a lng way t find a suitable slutin that puts sufficient fd n the dinner table while keeping peple and the envirnment as healthy as pssible.
1. Add mre infrmatin: …, but als… ; …, and …as well; In additin, …; als; Mrever…2. Explain r supprt a pint: Fr example, …; Fr instance, …3. State a cnclusin: Therefre, …; Hence...
4. Say smething that cntrasts with what has just been said: …, but…; …, hwever, …; nevertheless... 5. Sequencing: In turn, …6. Emphasizing: In fact, …7. Intrducing a new tpic/thing: As fr…; As an alternative, …
DiscussinIs the authr f the passage fr r against rganic farming? Hw d yu knw? 2. What ther disadvantages f rganic farming can yu think f?
Pst-reading: Activity 1
Is the authr f the passage fr r against rganic farming? Hw d yu knw?
Sme peple wuld prefer t stp the use f man-made chemicals in agriculture entirely. … Organic farming is nwhere near able t meet that need. Therefre, there is still a lng way t find a suitable slutin that puts sufficient fd n the dinner table while keeping peple and the envirnment as healthy as pssible.
2. What ther disadvantages f rganic farming can yu think f?
higher cst f prducing fdgreater effrt required t farming …
Write an essay shwing whether yu supprt chemical farming r rganic farming. Cmplete the utline first.(P57)
Pst-reading: Activity 2
Tpic sentence: In my pinin, _____farming is preferable t _____ farming because________.
Pint 1: _________________________ (Detail ) _________________________
Supprting details/evidence
Argument 1 (Tpic sentence)
Organic farmers als use many ther methds t prduce rich sil. They ften change the kind f crp grwn in each field every year. Fr instance, they may grw crn r wheat in a field ne year and then grw beans there the next. … Organic farmers als plant diverse crps that use different depths f sil t help keep it rich. Fr example, peanuts grw n the grund’s surface, …
Cnclusin: __________________
Cnclusin: In clsing, explring space prvides the wrld with many different benefits.
Opinin: Hwever, thers feel this is a shallw view which fails t realise hw explring space helps us.
Rephrase the pinin
Bdy * argument /tpic sentence * supprting details
D yu d a gd jb f expressing yur pinin?Des each paragraph have ne main idea?Des each paragraph have at least ne detail t supprt its main idea?D yu sequence the pints in a lgical rder? D yu d a gd jb persuading thers t accept yur pinin?
Use the checklist t review yur draft.
Learning bjectives
In this class, yu will
wrk ut the cntent, structure and language features f the text；write yur pinin in an essay abut chemical farming r rganic farming.
What des the picture shw?
Where?What?Why?…
CHEMICAL VERSUS ORGANIC FARMING
Pre-reading: predictin
Read the text, check yur predictin and answer the questins:What is chemical farming?What is rganic farming?
While-reading: Activity 1
What is chemical farming?
Chemical farming is farming using chemical pesticides and artificial fertilizers.
Chemical pesticides and artificial fertilizers have been in widespread use in farming since the middle f the 20th century. (Paragraph 1)
What is rganic farming?
Organic farming is simply farming withut using any chemicals.
Read the text, and answer the questins n page 56.
1. Why did many farmers welcme the intrductin f chemical farming?2. What cncerns many peple abut the use f pesticides?3. What is ne prblem with the use f chemical fertilizers?
While-reading: Activity 2
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? 6.(1) What is the gal f using rganic farming methds? (2) D yu think it can be reached? Why r why nt?
1. Why did many farmers welcme the intrductin f chemical farming?
Many farmers welcmed them as a great way t fight crp diseases and increase prductin.
2. What cncerns many peple abut the use f pesticides?
Their lng-term use can smetimes harm bth the land and peple’s health.
Over time, hwever, what sme scientists have fund is that their lng-term use can smetimes harm bth the land and peple’s health.（Paragraph 1）
3. What is ne prblem with the use f chemical fertilizers?
Crps grwn with them usually grw t fast t be rich in nutritin.
4. Hw is rganic farming different frm chemical farming?
Organic farming is simply farming withut using any chemicals. Organic farmers fcus n keeping their sil rich and free f disease thrugh natural means.
5. Why d rganic farmers change the kind f crp grwn in a field every year?
Different crps are grwn because they put imprtant minerals back int the grund, making it ready fr the next batch f crps.
6. (1) What is the gal f using rganic farming methds?
The gal f using rganic farming methds is t grw gd fd while aviding damage t the envirnment r t peple’s health.
6. (2) D yu think it can be reached? Why r why nt?
Yes, I think this gal can be reached. Farmers wrked fr centuries withut using any kinds f chemicals and withut harming the envirnment, and the fd they prduced was just fine.
Match the main ideas (A-D) belw with the paragraphs. Then cmplete the sentences in the table. (P56)
While-reading: Activity 3
Chemical pesticides and artificial fertilizers have been in widespread use in farming … Over time, hwever, what sme scientists have fund is that their lng-term use can smetimes harm bth the land and peple’s health. Fr example, … they ften have less flavr as well.
Paragraph 1-2
D The prblems with chemical farming
Pesticides can kill helpful bacteria and insects.Sme pesticides have been prhibited because f the damage they cause.Crps grwn with chemical fertilizers usually grw t fast t be full f nutritin.
Paragraph 3
A What rganic farming is
Many rganic farmers use natural waste frm animals as fertilizer.
Paragraph 4
C Organic methds fr prducing rich sil
They ften change the kind f crp grwn in each field every year.They als plant crps that use different depths f the sil t help keep it rich.
Paragraph 5
B Why man-made chemicals are still used in farming
Organic farming is nwhere near being able t meet the high demand fr fd arund the wrld.
Read the text again and cmplete the table belw with the help f the signpsts in it.
While-reading: Activity 4
Chemical farming
fight crp diseasesincrease prductin (serve the high demand fr fd arund the wrld)
1. pesticide—smetimes harm land and peple’s healthkill helpful bacteria and insectsstay fr a lng time and affect crps, animals and peple 2. chemical fertilizer—nt rich in nutritin and have less flavr
switch t rganic farming
Chemical pesticides and artificial fertilizers have been in widespread use in farming since the middle f the 20th century. When they were first intrduced, many farmers welcmed them as a great way t fight crp disease and increase prductin. Over time, hwever, what sme scientists have fund is that their lng-term use can smetimes harm bth the land and peple’s health.
Paragraph 1
Paragraph 2
Fr example, pesticides can damage… but als helpful nes. In additin, these chemicals … fr a lng time. This affects the crps … and, in turn, the animals and humans wh digest them. In fact, sme pesticides like DDT … As fr chemical fertilizers, … They may lk beautiful n the utside, but inside … and they ften have less flavr as well.
Organic farming
keep sil rich and free frm disease thrugh natural means
natural waste frm animals as fertilizerchange the kind f crp in each field every yearplant diverse crps using different depths f sil
unable t serve the high demand fr fd arund the wrld
There is still a lng way t find a suitable slutin.
As an alternative, sme farmers have switched t rganic farming, and many custmers have turned t rganic fd when they shp at the lcal grcery. … Fr example, many rganic farmers use natural waste frm animals as fertilizer. This makes the sil in their fields richer in minerals. It als keeps the air, sil, water and crps free f chemicals.
smething ffering the pssibility f different chices
Organic farmers als use many ther methds t prduce rich sil. They ften change the kind f crp grwn in each field every year. Fr instance, they may grw crn r wheat … Organic farmers als plant diverse crps that use different depths f sil t help keep it rich. Fr example, peanuts …
Sme peple … What keeps them frm ding s is the fact that chemical farming serves the high demand fr fd arund the wrld. Organic farming is nwhere near able t meet that need. Therefre, there is still a lng way t find a suitable slutin that puts sufficient fd n the dinner table while keeping peple and the envirnment as healthy as pssible.
1. Add mre infrmatin: …, but als… ; …, and …as well; In additin, …; als; Mrever…2. Explain r supprt a pint: Fr example, …; Fr instance, …3. State a cnclusin: Therefre, …; Hence...
4. Say smething that cntrasts with what has just been said: …, but…; …, hwever, …; nevertheless... 5. Sequencing: In turn, …6. Emphasizing: In fact, …7. Intrducing a new tpic/thing: As fr…; As an alternative, …
DiscussinIs the authr f the passage fr r against rganic farming? Hw d yu knw? 2. What ther disadvantages f rganic farming can yu think f?
Pst-reading: Activity 1
Is the authr f the passage fr r against rganic farming? Hw d yu knw?
Sme peple wuld prefer t stp the use f man-made chemicals in agriculture entirely. … Organic farming is nwhere near able t meet that need. Therefre, there is still a lng way t find a suitable slutin that puts sufficient fd n the dinner table while keeping peple and the envirnment as healthy as pssible.
2. What ther disadvantages f rganic farming can yu think f?
higher cst f prducing fdgreater effrt required t farming …
Write an essay shwing whether yu supprt chemical farming r rganic farming. Cmplete the utline first.(P57)
Pst-reading: Activity 2
Tpic sentence: In my pinin, _____farming is preferable t _____ farming because________.
Pint 1: _________________________ (Detail ) _________________________
Supprting details/evidence
Argument 1 (Tpic sentence)
Organic farmers als use many ther methds t prduce rich sil. They ften change the kind f crp grwn in each field every year. Fr instance, they may grw crn r wheat in a field ne year and then grw beans there the next. … Organic farmers als plant diverse crps that use different depths f sil t help keep it rich. Fr example, peanuts grw n the grund’s surface, …
Cnclusin: __________________
Cnclusin: In clsing, explring space prvides the wrld with many different benefits.
Opinin: Hwever, thers feel this is a shallw view which fails t realise hw explring space helps us.
Rephrase the pinin
Bdy * argument /tpic sentence * supprting details
D yu d a gd jb f expressing yur pinin?Des each paragraph have ne main idea?Des each paragraph have at least ne detail t supprt its main idea?D yu sequence the pints in a lgical rder? D yu d a gd jb persuading thers t accept yur pinin?
Use the checklist t review yur draft.
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