Unit5 Using language -Reading（14张PPT）

(共14张PPT)
Unit5 Working The Land
My lifelong pursuit is to keep all the people away from hunger.
-Yuan Longping
Learning Aims
阅读文章 Chemical Versus Organic Farming ，了解化学耕作和有机耕作的概念及优缺点
学习表达自己对于耕作方式的看法
What can be used to make plants grow better
Fertilizer.
Chemical fertilizers
Natural waste from animals
Chemical farming
organic farming
Which tomatoes do you prefer
5 yuan / kg
30 yuan / kg
Normal tomatoes
Organic tomatoes
Read the text “Chemical versus organic farming” and then answer the following questions.
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 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.
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
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 _______________________________.
from animals
change the kind of crop
every year
different depths
demand for food around the world
natural waste
A
C
B
The author uses “Benefits — Problems — Solutions” to introduce chemical farming and organic farming. Finish the table according to the passage.
Farming Benefit Problem Solution
Chemical farming
Organic farming
fight crop disease and increase production
sometimes harm both the land and people’s health
switch to organic farming
make the soil rich; keep the air, soil, water and crops free of chemicals
cannot meet the need
still a long way to find a suitable solution
The author uses some transitions (过渡词)between ideas. Find some in Para.2 and name their functions.
Transition words Function
For example,… Illustrating
…, but also… Adding more information and emphasising
In addition,… Adding more information
In turn,… Sequencing
In fact,… Illustrating / Emphasising
As for… Introducing a new topic / thing
…, but… Contrasting
…, and… as well Adding more information
Decide whether you support chemical farming or organic e up with three main points to support your opinion, and then add at least one detail to support each main point, complete the outline below.
Use your outline to write a short essay giving your opinion on the topic.