资源简介

(共19张PPT)
UNIT 5 WORKING THE LAND
Chemical farming VS Organic farming
Write an argumentative essay
Learning Objectives
In this lesson, we will
understand the differences between chemical and organic farming and their advantages and disadvantages;
learn about the structure of an argumentative essay and the author’s writing techniques;
write an argumentative essay to express our views on chemical farming or organic farming.
Let’s quiz
被广泛使用
相应地；转而
ban v.
生长过快而营养不足
口感较差
作为一种替代的方法
a shop/store that sells food and other things
通过自然方法
使……免于……
for example
完全地
enough
be in widespread use
in turn
prohibit
grow too fast to be rich in nutrition
have less flavor
as an alternative
grocery
through natural means
keep…free of…
for instance
entirely
sufficient
Do you know what is chemical farming and organic farming
Reading
lead in
When you go to the store to buy food, would you prefer to choose organic food Why or why not？
Organic farming is simply farming ________________
Chemical farming is farming with _________ , especially ___________________ and _________________.
chemicals
chemical
pesticides
artificial fertilizers
without chemicals .
Para.1
Para.3
Read para.1 and para.3, and then answer the following questions.
Reading
while
Choose the main ideas (A-D)below with the paragraphs.
A What organic farming is
B Why man-made chemicals are still used in farming
C Organic methods for producing rich soil
D The problems with chemical farming
Reading
D The problems with chemical farming
A What organic farming is
C Organic methods for producing rich soil
B Why man-made chemicals are still used in farming
Part 1:
(Para 1-2)
Part 2:
(Para 3-4)
Part 3:Para 5
The benefits and problems of chemical farming.
What organic farming is and organic methods for producing rich soil.
There is still a long way
to go before balancing sufficient food and the health of people and environment.
Read for Structure
e7d195523061f1c0c2b73831c94a3edc981f60e396d3e182073EE1468018468A7F192AE5E5CD515B6C3125F8AF6E4EE646174E8CF0B46FD19828DCE8CDA3B3A044A74F0E769C5FA8CB87AB6FC303C8BA3785FAC64AF5424764E128FECAE4CC72932BB65C8C121A0F41C1707D94688ED66335DC6AE12288BF2055523C0C26863D2CD4AC454A29EEC183CEF0375334B579
Farming benefits/advantages problems/disadvantages solutions/methods
chemical farming Group1-2
organic farming Group3-4
problems with fertilisers:
problems with pesticides:
crop disease
production
organic farming
harm both the land and people's health
nutrition, essential minerals and flavour
keep soil rich and free of disease
keep the air ...free of chemicals
use natural waste
change the kind of crop grown in each field every year.
plant diverse crops
able to meet that need
Read for Details
fight
increase
less
switch to
nowhere near
1.
2.
3.
Read for useful expressions





however, but,instead, on one hand … on the other hand
for example, for instance, such as
both…and…, not only…but also, in addition, what’s more, besides, moreover
why…is because…, therefore, because of, as a result，cause
as for, as an alternative
Summarize the transitional words
contrast对比
illustrate解释
add补充
cause and effect因果
introduce a new topic
What’s the author’s attitude towards chemical farming and organic farming
A.Negative B. ambiguous / m b ɡju s/
C. objective D. supportive
What ’s your opinion on chemical or organic farming
Let’s write an argumentative passage about it.
Thinking
What’s your argument
In my opinion /view /eyes，as far as I am concerned, organic farming is preferable to chemical farming, because it’s beneficial to both people’s health and the environment.
In my opinion, I agree/be in favor of chemical farming, because it can fight crop decease.
Writing
How to write an argumentative essay
Conclusion
argument
reasons
Topic sentence:
In my opinion, ________farming is better than _______ farming because____________.
(Topic sentence) +detail:
Point 1: To begin with, ___________.(Detail)_______.
Point 2: What’s more, ____________.(Detail)_______.
Point 3: Finally,_________________.(Detail)_______.
Conclusion:
In closing, I am fully convinced that__________________.
Write an argumentative essay giving your opinion on chemical or organic farming.
In my opinion, organic farming is better than chemical farming because it’s beneficial to both people’s health and the environment.
To begin with, chemical farming harms the environment. For instance, the chemicals will stay in the soil and water for a long time, and are absorbed in the food chain.What’ s more, there is no doubt that the chemicals staying inside the crops can cause us health problems or give us diseases such us cancer. Finally, organic produce simply uses natural fertilizers, making vegetables and fruit tasty and nutritious.
In summary, I’m convinced that organic food will be more and more popular.
Sample
summmary
Use your own words to explain the whole text with the following mindmap.
Chemical Farming
Organic Farming
what
benefits
problems
what
benefits
problems
Author’s Thinking
There is still a long way to find a suitable solution that……
Farming with chemicals, especially chemical pesticides and artificial fertilizers
a great way to fight crop diseases and increase production.
Harm both the land and people’s health.
Food: less nutrition, less essential minerals, and less flavour.
Farming without chemicals
makes the soil richer in minerals
keeps the air, soil, water and crops free of chemicals,
avoid damage to the environment or to people’s health.
Organic farming is nowhere near able to meet the high demand for food
around the world.
Homework
A:Try to make a mind map for this essay.
B:Revise and polish the argumentative essay to express your opinion.
A. What organic farming is.
B. Why man-made chemicals are still used in farming.
C. Organic methods for producing rich soil.
D. The problems with chemical farming
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 ______________.
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 ________________________________.
bacteria and insects
prohibited
damage they cause
grow too fast
nutrition
natural waste from animals
change the kind of crop
every year
different depths
demand for food around the world
D
A
C
B
Read for Main Idea and Details
Thanks for
your cooperation！

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