chemical-or-organic-farming-公开课课件
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必修4Unit 2 Chemical or Organic Farming公开课优质获奖课件
Task 1 Underline the topic sentence of each paragraph.
A. What are some of the problems caused by chemical fertilizers?
B. ...____________________________________________________ C. ...____________________________________________________
A What are some of the problems caused by chemical fertilizers? First, they damage the land by killing the helpful bacteria and pests as well as the harmful ones. Chemicals also stay in the ground and underground water for a long time. This affects crops and, therefore, animals and humans, since chemicals get inside the crops and cannot just be washed off. These chemicals in the food supply build up in people’s bodies over time. Many of these chemicals can lead to cancer or other illnesses. In addition, fruit, vegetables and other food grown with chemical fertilizers usually grow too fast to be full of much nutrition. They may look beautiful, but inside there is usually more water than vitamins and minerals.
完整版chemical or organic farming 公开课课件
Do you know about organic farming? Reading
Chemical or Organic Farming
1).化肥
fertilizer
2)细菌
bacteria
3).对…造成损害 4).洗掉某物
cause/do damage to wash off
5).导致;造成(后果);通往
7. Some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil, and then leaving it in the ground to become a natural fertilizer for the next year's crop.
The same goal : __t_o__g_ro_w__g_o_o_d_f_o_o_d_a_n_d___t_o_ _a_vo_i_d_d_a_m__a_g_in_g__th_e__e_n_v_ir_o_n_m_e_n_t_o_r__________ _p_e_o_p_le_'s__h_e_a_lt_h_. _________________
There are three problems. First , they can damage … as well as …. They also stay in the … and …. In addition , …grow too fast to ….
first;second; finally;last but not least ,etc.
含介词to的东侧短语： come to 来到，苏醒 stick to 坚持 refer to 参考， 涉及 devote to 致力于 look forward to 盼望 turn to
Chemical or Organic Farming
1).化肥
fertilizer
2)细菌
bacteria
3).对…造成损害 4).洗掉某物
cause/do damage to wash off
5).导致;造成(后果);通往
7. Some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil, and then leaving it in the ground to become a natural fertilizer for the next year's crop.
The same goal : __t_o__g_ro_w__g_o_o_d_f_o_o_d_a_n_d___t_o_ _a_vo_i_d_d_a_m__a_g_in_g__th_e__e_n_v_ir_o_n_m_e_n_t_o_r__________ _p_e_o_p_le_'s__h_e_a_lt_h_. _________________
There are three problems. First , they can damage … as well as …. They also stay in the … and …. In addition , …grow too fast to ….
first;second; finally;last but not least ,etc.
含介词to的东侧短语： come to 来到，苏醒 stick to 坚持 refer to 参考， 涉及 devote to 致力于 look forward to 盼望 turn to
人教版高中英语必修四Unit2 Using Language Chemical or organic farmingPPT
Organic farming is simply farming without using any chemicals. 有机耕作就 是不用任何化学肥料的耕作。They focus
on keeping their soil rich and free of disease. 农民关心的是保持土壤肥沃并且免 受病害。A healthy soil reduces disease
人 教 版 高 中 英语必 修四Un it2 U s ing L a nguage C h em ical o r o rga nic f a rming ( 1 )( 共44张 PPT)
人 教 版 高 中 英语必 修四Un it2 U s ing L a nguage C h em ical o r o rga nic f a rming ( 1 )( 共44张 PPT) 人 教 版 高 中 英语必 修四Un it2 U s ing L a nguage C h em ical o r o rga nic f a rming ( 1 )( 共44张 PPT)
levels of soil, for example, planting peanuts that
use the ground's surface followed by vegetables that put down deep roots. 有机耕作的农民还种植多 种农作物来利用不同层次的土壤。比如，他们先种植 生长于浅层土壤的花生，然后再种植生根于深层土壤 的蔬菜。Some organic farmers prefer planting
grass between crops to prevent wind or water
from carrying away the soil, and then leaving it in
on keeping their soil rich and free of disease. 农民关心的是保持土壤肥沃并且免 受病害。A healthy soil reduces disease
人 教 版 高 中 英语必 修四Un it2 U s ing L a nguage C h em ical o r o rga nic f a rming ( 1 )( 共44张 PPT)
人 教 版 高 中 英语必 修四Un it2 U s ing L a nguage C h em ical o r o rga nic f a rming ( 1 )( 共44张 PPT) 人 教 版 高 中 英语必 修四Un it2 U s ing L a nguage C h em ical o r o rga nic f a rming ( 1 )( 共44张 PPT)
levels of soil, for example, planting peanuts that
use the ground's surface followed by vegetables that put down deep roots. 有机耕作的农民还种植多 种农作物来利用不同层次的土壤。比如，他们先种植 生长于浅层土壤的花生，然后再种植生根于深层土壤 的蔬菜。Some organic farmers prefer planting
grass between crops to prevent wind or water
from carrying away the soil, and then leaving it in
chemicalororganicfarming概要写作PPT课件
Para 4. Organic farmers also use many other methods to keep the soil fertile.
using language
1 Over the past half century,u_s__in_g______ (use)
chemical fertilizers _h_a_s__b_e_co_m__e____ (become) very common in farming.
avoid doing sth
6避免做某事
build up
7逐步建立，增进
lead to doing sth
8导致
in addition
9另外，除此之外，并且
more A than B
10与其说B 不如说是 A
use....as...
11用...作为....
make....richer in...
12使....更加富足
主语
谓语
Recently, however, scientists have been finding
that long-term use of the chemical fertilizers
can cause damage to the land and, even more
dangerous, to people's health.
every few years
13每几年
prefer doing sth
14宁愿做某事
prevent/stop.... (from).... 15阻止某人做某事
over the past half centuty 1.在过去的半个世纪里
using language
1 Over the past half century,u_s__in_g______ (use)
chemical fertilizers _h_a_s__b_e_co_m__e____ (become) very common in farming.
avoid doing sth
6避免做某事
build up
7逐步建立，增进
lead to doing sth
8导致
in addition
9另外，除此之外，并且
more A than B
10与其说B 不如说是 A
use....as...
11用...作为....
make....richer in...
12使....更加富足
主语
谓语
Recently, however, scientists have been finding
that long-term use of the chemical fertilizers
can cause damage to the land and, even more
dangerous, to people's health.
every few years
13每几年
prefer doing sth
14宁愿做某事
prevent/stop.... (from).... 15阻止某人做某事
over the past half centuty 1.在过去的半个世纪里
人教版高中英语必修四：M4U2chemicalororganicfarming课件
growth to the education of women. a
2. Bring the object into focus if you want a clear
photograph. b 3. She tried to focus her mind on her work. d
4. She turned the camera and focused on Martin’s face.
b) 当“供应品;生活用品;补给品” 等,常用复数supplies。
military supplies 军需品 household supplies 家庭用品 medical supplies 医用品
2) 用作动词时,指“供给,提供,备办”等, supply sb. (with) sth , supply sth. to /for sb. -- They supplied food to/for them.
Organic Methods ◆Using _n_a_tu_r_a_l_ waste
farming
from animals as
fertilizer
◆Changing
_th_e__k_in_d__o_f_c_r_o_p_ in each
field every few years
◆ Using d__if_fe_r_e_n_t_l_e_v_e_ls_
of soil to plant crops
◆ Planting _g_r_a_ss_
between crops
MATCH THE ADVANTAGES WITH THE REASONS.
1. They use waste from animals.
2. Bring the object into focus if you want a clear
photograph. b 3. She tried to focus her mind on her work. d
4. She turned the camera and focused on Martin’s face.
b) 当“供应品;生活用品;补给品” 等,常用复数supplies。
military supplies 军需品 household supplies 家庭用品 medical supplies 医用品
2) 用作动词时,指“供给,提供,备办”等, supply sb. (with) sth , supply sth. to /for sb. -- They supplied food to/for them.
Organic Methods ◆Using _n_a_tu_r_a_l_ waste
farming
from animals as
fertilizer
◆Changing
_th_e__k_in_d__o_f_c_r_o_p_ in each
field every few years
◆ Using d__if_fe_r_e_n_t_l_e_v_e_ls_
of soil to plant crops
◆ Planting _g_r_a_ss_
between crops
MATCH THE ADVANTAGES WITH THE REASONS.
1. They use waste from animals.
优质课课件M4U2-chemical-or-organic-farming
prevent…from
Organic farming methods
have the same goal: to grow good food and avoid damaging
the environment or people’s health.
Para 3:
be rich in…
✓using natural waste from animals as fertilizer. keep free from
Many farmers welcomed them as a great way to stop crop disease and increase production.
Para 1
Over the past half century, using chemical fertilizers has become very common in farming. Many farmers welcomed them as a great way to stop crop disease and increase production.
Para 3
With these discoveries, some farmers and many customers are beginning to turn to organic farming.
What is organic farming?
Para 3
With these discoveries, some farmers and many customers are beginning to turn to organic farming.
Many farmers welcomed them as a great way to stop crop disease and increase production.
Organic farming methods
have the same goal: to grow good food and avoid damaging
the environment or people’s health.
Para 3:
be rich in…
✓using natural waste from animals as fertilizer. keep free from
Many farmers welcomed them as a great way to stop crop disease and increase production.
Para 1
Over the past half century, using chemical fertilizers has become very common in farming. Many farmers welcomed them as a great way to stop crop disease and increase production.
Para 3
With these discoveries, some farmers and many customers are beginning to turn to organic farming.
What is organic farming?
Para 3
With these discoveries, some farmers and many customers are beginning to turn to organic farming.
Many farmers welcomed them as a great way to stop crop disease and increase production.
人教版高中英语必修四 unit2 woking the land reding2 Chemical or Organic Farming PPT课件
chemical fertilizers natural fertilizers
Expressions
1.化肥
chemical fertilizers
2.对…造成损害
cause/do damage to
3.洗掉某物
wash off
4.导致;造成(后果);通往 lead to
5.逐渐增强,建立
bulid up
Farming without using chemicals. • 3.What is the goal of “organic farming”?
To grow good food and avoid damaging the environment or people’s health
• Read the text carefully • 1.Why are chemical fertilizers so popular in
1. His mistakes l_e_d_t_o_ his failure. 2. These chemicals in the food supply_b_u_li_d_u_p
in people’s bodies over time. 3. All roads _l_ea_d__t_o_ Rome. 4. Please _f_o_c_u_s your mind_o_n_ the
Chemical or Organic Farming
(reading 2)
• Let’s understand the title. • How many parts do you think the
passage? And what are they about? Two. 1. Chemical Farming 2. Organic Farming
chemical_or_organic_farming优质课评比课件
Fill in the blanks according to the Ipnasrseacgeent. days, scientists have
discoveredchtehmaitcaulsing________ fertilizers for a longcatuismee dcaamnag_e________________ the land and atloso people's health. There are sepvreorballem_s_________ caused by chemical
李鸥 丽水黎明中学
精品课件
First, buy or select the seeds from the store.
精品课件
Second, we need to plow（犁田） or turn over the
soil.
精品课件
Third , we sow the seeds in the soil.
1 using natural waste from animals as f2ertilizer. 3 changing the kind of crop in each field . s4oipll.anting crops to use different levels of
planting grass between crops to prevent … The same goal : ________________t_o__g_r_o_w__ __g_o_o_d__f_o_o_d__a_n_d___a_v_o_i_d__d_a_m_a_g_i_n_g__t_h_e____ __e_n_v_i_r_o_n_m_e_n_t__o_r__p_e_o_p_精l_品e课_’件__s__h_e_a_lth.
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Recently, however,
Long-term use of chemical fertilizers can cause damage to the land and , even more dangerous, to people’s health.
Read paragraph 2 and find out the problems caused by using chemical fertilizers. There are three problems.First, they can damage … as well as …. They also stay in the … and …. In addition, …grow too fast to ….
water the crop
rid the soil of the weed
fertilizer
chemical fertilizers
natural fertilizers
How many kinds of fertilizers do farmers use? There are two kinds. They are chemical fertilizers and natural ones.
3 planting crops to use different levels of soil
4 planting grass between crops to prevent … The same goal : ________________________ to grow good food and to ______________________________________ avoid damaging the environment or ______________________________ people’s health.
first;second; finally;last but not least ,etc.
Read paragraph 3-4 What are the advantages of organic farming?
The farmers focus on keeping their soil rich and free of disease and keeping the air , soil, water and crops free from chemicals.
Which kind do farmers use when they are doing organic farming? Do you know about organic farming? Reading Chemical or Organic Farming
1).化肥
fertilizer
[分析]
①本句的主干结构是一个简单句, 其结构是: 主语 (farmers) + 谓语(prefer) + 并列宾语(planting ... + leaving ...)。 ②其中 between crops和in the ground作地点状语。 ③两个宾语后面又分别带有一个不定式作目的状语（to prevent wind or water from carrying away the soil和to
Second reading 1 Why are chemical fertilizers so popular in farming today? 2 After the long-term use of chemical fertilizers, what have scientists found?
5. This also keeps the air, soil, water and crops free from chemicals.
这样还可以让空气、土壤、水以及农作物不受化学 物质的污染。
keep… free from/of…使……免受(影响/伤害等) 锻炼能使我们摆脱疾病。 Exercise can keep us free from disease. 联合国正试图使世界免受战争的威胁。 The United Nation is trying to keep the world free from the threat of war.
9).集中(注意力、精力)于 10).每隔几年
focus on
every few years
11).避免做…
avoid doing
First reading: get the main idea of each paragraph. para1:Long-term use of fertilizers
focus on:集中(注意力，精力等）于
Focus on life.
瞄准生活。 focus one’s attention on 集中注意力于 focus one’s mind on 把心思集中到……上
You should focus your attention on your work.
你应该把注意力集中在你的工作上。
[联想] result in引起(某种结果)、使获得(某种成果)、结 果……。如：
The accident resulted in two deaths. result from由……造成、因……而产生。如： Sickness sometimes results from eating too much.
therefore; meanwhile; anyhow; thus ;otherwise; moreover; besides etc.
Many farmers welcomed them as a great way to stop crop disease and increase production.
First, buy or select the seeds from the store.
Second, we need to plough or turn over the soil.
Third , we sow the seeds in the soil.
Finally, we can harvest our grain/sorghum/peanuts .
2. Many of these chemicals can lead to cancer or other illnesses.
lead to: 导致；造成(后果）
Too much work and too little rest often lead to illness.
通往 过量的工作和过少的休息会引起疾病。
含介词to的东侧短语： come to 来到，苏醒 refer to 参考， 涉及 look forward to 盼望 stick to devote to turn to 坚持 致力于
get close to 靠近
3. They focus on keeping their soil rich and free of disease.
7. Some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil, and then leaving it in the ground to become a natural fertilizer for the next year’s crop.
Tips: several phrases can be used.
The methods to keep the soil fertile
1 using natural waste from animals as fertilizer. 2 changing the kind of crop in each field .
[分析]
①本句结构比较复杂。其主干结构为: 主句(Crops put
important minerals back into the soil) + 状ps)。
②状语中又包含“make + it + 形容词”结构和由that引
导的定语从句(that need rich and fertile soil)。
All roads lead to Rome. [即学即练] 用lead to的适当形式完成句子。 条条大道通罗马。 1. Students should always remember that hard work leads to is the main way which ________ success. led to 2. The bad weather ________ a terrible accident a few days ago.
can cause damage to the land and people „s health para2: The problem caused by chemical fertilizers
para3: The advantages of using organic farming. para4: Some methods to keep the soil fertile.
fertilize the soil
kill off the pest
In order to improve the output of the crop, we need to rid the soil of the weed, water the crop, the to improve the fertilize output of the crop soil and kill off the pest.
Long-term use of chemical fertilizers can cause damage to the land and , even more dangerous, to people’s health.
Read paragraph 2 and find out the problems caused by using chemical fertilizers. There are three problems.First, they can damage … as well as …. They also stay in the … and …. In addition, …grow too fast to ….
water the crop
rid the soil of the weed
fertilizer
chemical fertilizers
natural fertilizers
How many kinds of fertilizers do farmers use? There are two kinds. They are chemical fertilizers and natural ones.
3 planting crops to use different levels of soil
4 planting grass between crops to prevent … The same goal : ________________________ to grow good food and to ______________________________________ avoid damaging the environment or ______________________________ people’s health.
first;second; finally;last but not least ,etc.
Read paragraph 3-4 What are the advantages of organic farming?
The farmers focus on keeping their soil rich and free of disease and keeping the air , soil, water and crops free from chemicals.
Which kind do farmers use when they are doing organic farming? Do you know about organic farming? Reading Chemical or Organic Farming
1).化肥
fertilizer
[分析]
①本句的主干结构是一个简单句, 其结构是: 主语 (farmers) + 谓语(prefer) + 并列宾语(planting ... + leaving ...)。 ②其中 between crops和in the ground作地点状语。 ③两个宾语后面又分别带有一个不定式作目的状语（to prevent wind or water from carrying away the soil和to
Second reading 1 Why are chemical fertilizers so popular in farming today? 2 After the long-term use of chemical fertilizers, what have scientists found?
5. This also keeps the air, soil, water and crops free from chemicals.
这样还可以让空气、土壤、水以及农作物不受化学 物质的污染。
keep… free from/of…使……免受(影响/伤害等) 锻炼能使我们摆脱疾病。 Exercise can keep us free from disease. 联合国正试图使世界免受战争的威胁。 The United Nation is trying to keep the world free from the threat of war.
9).集中(注意力、精力)于 10).每隔几年
focus on
every few years
11).避免做…
avoid doing
First reading: get the main idea of each paragraph. para1:Long-term use of fertilizers
focus on:集中(注意力，精力等）于
Focus on life.
瞄准生活。 focus one’s attention on 集中注意力于 focus one’s mind on 把心思集中到……上
You should focus your attention on your work.
你应该把注意力集中在你的工作上。
[联想] result in引起(某种结果)、使获得(某种成果)、结 果……。如：
The accident resulted in two deaths. result from由……造成、因……而产生。如： Sickness sometimes results from eating too much.
therefore; meanwhile; anyhow; thus ;otherwise; moreover; besides etc.
Many farmers welcomed them as a great way to stop crop disease and increase production.
First, buy or select the seeds from the store.
Second, we need to plough or turn over the soil.
Third , we sow the seeds in the soil.
Finally, we can harvest our grain/sorghum/peanuts .
2. Many of these chemicals can lead to cancer or other illnesses.
lead to: 导致；造成(后果）
Too much work and too little rest often lead to illness.
通往 过量的工作和过少的休息会引起疾病。
含介词to的东侧短语： come to 来到，苏醒 refer to 参考， 涉及 look forward to 盼望 stick to devote to turn to 坚持 致力于
get close to 靠近
3. They focus on keeping their soil rich and free of disease.
7. Some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil, and then leaving it in the ground to become a natural fertilizer for the next year’s crop.
Tips: several phrases can be used.
The methods to keep the soil fertile
1 using natural waste from animals as fertilizer. 2 changing the kind of crop in each field .
[分析]
①本句结构比较复杂。其主干结构为: 主句(Crops put
important minerals back into the soil) + 状ps)。
②状语中又包含“make + it + 形容词”结构和由that引
导的定语从句(that need rich and fertile soil)。
All roads lead to Rome. [即学即练] 用lead to的适当形式完成句子。 条条大道通罗马。 1. Students should always remember that hard work leads to is the main way which ________ success. led to 2. The bad weather ________ a terrible accident a few days ago.
can cause damage to the land and people „s health para2: The problem caused by chemical fertilizers
para3: The advantages of using organic farming. para4: Some methods to keep the soil fertile.
fertilize the soil
kill off the pest
In order to improve the output of the crop, we need to rid the soil of the weed, water the crop, the to improve the fertilize output of the crop soil and kill off the pest.