(共21张PPT)
Unit 5 Working the Land
Using Language
Evaluate chemical farming and organic farming
Chemical Versus Organic Farming
化学耕作与有机耕作
versus [ v s s]
prep.与…相对;与…对阵
Learning Aims
1. Linguistic Competence: To talk about the advantages and disadvantages of different kinds of farming and writing an argumentative essay on it.
2. Cultural Awareness: To learn about chemical farming and organic farming and think about the agricultural development.
3. Thinking Quality: To analyse the logic of the information and develop your own ideas.
4. Learning Abilities: To integrate information from various statements and to evaluate others’ composition.
Organic Farming
Chemical Farming
chemical fertilizers
pesticide
Organic Farming
natural fertilizers
Prediction
1. What is the text about
Chemical farming
Organic farming
pictures
title
2. What type of writing is it
A. Narration(记叙文)
B. Exposition(说明文)
C. Argumentation(议论文)
in widespread use 在广泛使用中 in discussion 在讨论中
on display/show 在展出中 under construction 在建设中
introduce v.引进;采用;介绍;引见;提出 ~ myself 自我介绍
introduction n.介绍;引见;引进;采用;引言;导论
welcome v.欢迎;迎接;欣然接受;庆祝 adj.受欢迎的
in turn :转而;进而;反过来
make them ill: make+宾语+形容词(宾语补足语)
in fact = as a matter of fact =in reality=actually 事实上
affect v. 影响;感动 ;喜欢;假装
affection n.感情;喜爱;关爱
effect n. 影响 have an effect/influence/impact on 对......有影响
side effect 副作用 take effect 生效;起作用
effective adj.有效的;生效的
take effective measures 采取有效的措施
efficient adj. 高效的
rich adj.富有的;肥沃的;昂贵的 be rich in 富有......;富含......
switch to 改变,转变 focus on doing 专注于
keep the soil rich:keep+o +oc(adj.) 使土壤肥沃
keep sth free of sth 使......免受......伤害
free adj. 自由的;免费的;空闲的 v.释放,使自由;使摆脱;解除
means n.方法;途径;手段
put down deep roots 扎根深处;生根;定居
keep/stop/prevent/discourage sb from doing 阻止某人做某事
serve/meet/satisfy the demand for 满足......的需求
nowhere near able to meet the need 远远不能满足需要
nowhere near enough 远远不够 nowhere near 远远不;远不及
(1)in depth全面,深入,详细
at a depth of… 在……的深处
(2)deep adj. 深的 adv. 在深处,至深处,深深地
be deep in thought陷入深思
deep into the night直到深夜
deeply adv. 很,非常;强烈地,深刻地
deepen vi. & vt. 加深,(使)变深 vt. 增长(知识),加深(理解)
归纳总结
Match the main ideas (A-D) below with the paragraphs.
Paragraph Main idea
1-2
3
4
5
B
C
A
D
What organic farming is
Why man-made chemicals are still used in farming
Organic methods for producing rich soil
The problems with chemical farming
Complete the sentences in the tables.
Para. Main Idea Detail
1-2 Pesticides can kill helpful _____________
Some pesticides have been _______ because of the ________________
Crops grown with chemical fertilisers usually _____________ to be full of _________.
bacteria and insects
prohibited
damage they cause to people and the environment
grow too fast
nutrition
D
Para. Main Idea Detail
3 Many organic farmers use __________________ as fertiliser.
4 They often __________________ grown in each field ___________.
They also plant crops that use ______________ of the soil to help keep it rich.
5 Organic farming is nowhere near able to meet the high ___________
____________________
waste from animals
change the kind of crop
every year
different depths
need/demand for food around the world
natural
A
C
B
1. Why did many farmers welcome the introduction of chemical farming
Many farmers welcomed them as a great way to fight crop diseases and increase production.
2. What concerns many people about the use of pesticides
Their long-term use can sometimes harm both the land and people's health.
3. What is one problem with the use of chemical fertilisers
Crops grown with them usually grow too fast to be rich in nutrition.
4. How is organic farming different from chemical farming
Organic farming is simply farming without using any chemicals. Organic farmers focus on keeping their soil rich and free of diseases through natural means.
5. Why do organic farmers change the kind of crop grown in a field every year
Different crops are grown because they put important minerals back into the ground, making it ready for the next batch of crops.
6. What is the goal of using organic farming methods Do you think it can be reached Why or why not
The goal of using organic farming methods is to grow good food while avoiding damage to the environment or to people's health.
Yes, I think this goal can be reached. Farmers worked for centuries without using any kinds of chemicals and without harming the environment, and the food they produced was just fine.
Words & expressions review
1. 被广泛使用
2. 随着时间推移
3. 长期的使用
4. 反过来,相反地
5. v.禁止
6. v. 富含...
7. 必需的矿物质
8. 转向
9. 专注于
10. 例如
11. 满足对食物的高需求
12. 远非如此,远远不
13. 尽可能的健康
be in widespread use
over time
long-term use
in turn
prohibit
be rich in
essential minerals
switch to
focus on
be devoted to
for instance
serve the high demand for food
meet the need/satisfy the need of
nowhere near
This is far from the case.
as healthy as possible
prohibit sb. from doing sth.
Thank you for your watching