Unit 2

Chemical or Organic farming?

Main idea of the text ?

Chemical fertilizes can cause many

problems, so organic farming is

becoming more popular.

First reading ( 3ms )

Read and then find out the topic sentence of each paragraph.

Para 1:

Para 2:

Para 3:

Para 4:

Recently, scientists have been finding that long-term use of these fertilizer can cause damage to the land and dangerous to people’s health.

Farmers turn to organic farming.

Organic farmers use many other methods to keep the soil fertile.

Some of the problems caused by chemical fertilizers

Read again and answer the following questions:

1.Why are chemical fertilizers so common in farming?

2.What problems are caused by using chemical fertilizers?

3. What is organic farming?

4. How do organic farmers to keep the soil fertile?

Second reading ( 5ms )

1.What do chemical fertilizers become very common in farming?

It is used as a great way to stop crop disease and increase production.

2.What problems are caused by using chemical fertilizers?

First, they damage the land by _______________________________________chemical________________________________for a long time. And it affects _____and _______________ ,since it __________ the crops and cannot be _________ ; these chemicals in the food supply ________ in the bodies, _________ cancers or other diseases. Fruit and other food with chemical grow too fast to _____________________ having more ______ than ________________________

killing the helpful bacteria and pests as well as the harmful ones.

stay in the ground and underground water

crops

and humans

animals

get insideswashed off

build upleading to

be full of much nutrition water

vitamins and minerals

3.What is organic farming?

Organic farming is farming without using

chemical fertilizers.

They focus on keeping their soil rich and

free of disease. A healthy soil reduces

disease and helps crops grow strong and

healthy.

Organic farming

Crops growing with natural rather than chemical fertilizer

Natural waste from animals

Make the soil richer in minerals and more fertile

A healthy soil

Reduce diseases in crops

Help crops grow strong and healthy

Change crops every few years

Corn ,wheat Peas soybeans

Put the minerals back into the soil, making it rich and healthy

Crops that use the surface of the soil (peanuts)

Crops that need a deeper level of soil (vegetable)

Planting grass to prevent wind or water from carrying away the soil and leave it in the ground to become a natural fertilizer for the next year’s crop

4.How do organic farmers to keep the soil fertile?

Retelling ( 8ms )

Retell the text according to the chart:Organic farming

I.Crops growing with natural fertilizers.

II.Farmers prefer natural waste from animals.

Natural fertilizer

Chemical fertilizer

1.make…richer and more fertile

2.reduce…and help…strong

3.the fertilizers kill…and healthy

4.keep free…from chemicals

1.leaving…is not good

2.grow…year after year

III.Farmers change crops every two or three years.

…to make sure what is left …

2.reduce v make sth smaller in size,number,degree,price,etc. 减少 , 降低

e.g. 公司尽力通过减少花销来提高利润。

The company tries to increase profits by

_______________ .

今年我们已经减少了业务开支。

We ______________ expenses this year.

reducing costs

have reduced

3. supply vt. 供给 ; n. 供应 , 供求之物 supply sth. to /for sb.= provide sth. to/for sb supply sb. with sth.= provide sb. With sth. 向 / 为某人提供某物in short supply 短缺medical supplies 医疗用品 They supplied the children ____ toys. They supplied toys ________ the children.

withto/for

[ 比较 ] supply, provide 和 afford

supply 向群众、市场、城市、工厂等供应物品。provide 主要指为某人、某物供应物品 , 尤其指生活必需品。afford 指为一定的目的而提供所需要的东西。

10. Dr Yuan is more a farmer than a scientist.

与其说袁博士是一个科学家不如说他是一个农民。be more than=not only 不仅仅，超过

Learning is more than reading.

be more +A +than +B 与其说是 B 还倒不如说是A

He is more an ordinary person than a leader.

Homework

1.Read the text again after class

2.Finish EX3 on WB

3.Finish the exercises on English weekly