Unit-2-Working-the-land----using-language.ppt

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1、fertilizerWhat do farmers put into the soil to make crops grow well?natural fertilizer (animal waste)chemical fertilizerFast readingPart 2Part 1Para 1.Para 2.Para 3.Para 4.Long-term use of_ fertilizers can cause damage to_.Skim the text, try to get the main idea of each paragraphTask 1Farmers and cu

2、stomers turn to_._ caused by chemical fertilizers.Other methods to keep_chemicalthe land and peoples healthProblemsorganic farming the soil fertile.Careful reading Read Part 1, try to find the problems and causes of chemical farming, then fill the blanks.Task one ProblemsCausesdamage_affect _, _ and

3、 _.lead to _ and _.fruit, vegetables and other food have less _.by killing _ _by staying in the ground and underground waterby building up_ _by growing too fastthe land crops animals humans cancer other illnessnutrition the helpful bacteria and pests as well as harmful ones. in peoples bodies over t

4、ime Read Part 2, try to find the methods and advantages of organic farming, then fill the blanks.Task two Methodsuse natural waste _ _make the soil _ _change _ _put _ back into _, making _ _plant different _ with different lengths of _Use different levels of soil plant _ and then leave it _ _ preven

5、t wind or water from carrying away the soil and become a natural fertilizer Advantages richer in minerals and so more fertile from animals as fertilizer the kind of crop in each field every few years important minerals the soil it ready for other crops crops roots grass between crops in the ground R

6、ead the text again, then choose the best answer for the following questions.Task three1. Which is NOT the reason why organic farmers prefer natural waste from animals? A. It can keep the food free from chemicals. B. It can keep the air, soil and water free from chemicals. C. It can kill harmful pest

7、s. D. It can make the soil richer in mineral.2. What is the advantage of using chemical fertilizers? A. Leaving chemicals in the ground for a long time is good for water supply. B. They can get the soil exhausted. C. They can kill helpful bacteria. D. They can kill harmful pest. 3. The organic farme

8、rs do the followings except _.A. adding fertilizers which is rich in mineralB. changing crops every two or three yearsC. planting seeds in different layers of the soilD. planting grass between crops to prevent the soil from being blown awayPost readingpara1: A new discovery of scientists.para2: Seve

9、ral problems caused by using chemical fertilizers.para3: The advantages of using organic farming. para4: Some methods to keep the soil fertile.The structure of this passagePara1 TopicPara2 ProblemsPara3 AdvantagesPara4 Several methodsillustration（阐明）（阐明）comparison kmprsn conclusionThe type of the ar

10、ticle is_expositionkspzn （说明文）（说明文）Writing tips in the textHow did the writer connect these two parts?Many farmers welcomed them as a great way to stop crop disease and increase production.Long-term use of chemical fertilizers can cause damage to the land and , even more dangerous, to peoples health

11、.Recently, however, therefore; meanwhile; anyhow; thus ;otherwise; moreover; besides etc.Tips: we can use some adverbs to make the text clear and reasonable Can you speak out some adverbs like these? Can you find some connectives （过渡词）（过渡词） in paragraph 2. There are three problems.First, they can da

12、mage as well as . They also stay in the and . In addition, grow too fast to . Tips: connectives are necessary for development first;second; finally;last but not least ,etc. What can you learn from this part?The farmers focus on keeping their soil rich and free of disease and keeping the air , soil,

13、water and crops free from chemicals.Tips: several phrases can be used. 1 such as wheat or corn that need rich and fertile soil. 2 planting peanuts that use the grounds surface followed by vegetables that put down deep roots. Read the following sentence, and find what they have in common?Tips: clause

14、s make the passage logical（逻辑的）（逻辑的） and beautifulThe two sentences both include attibutive clause.Tips: we can use some adverbs, connectives, phrases and clauses to beautify our composition.请以请以“PLASTIC OR CLOTH BAGS?”为题为题模模仿仿这篇文章的篇章结构这篇文章的篇章结构和句子结构去写一篇说和句子结构去写一篇说明文。明文。Discussion and practicePlasti

15、c Or Cloth Bags?illustration（阐明）（阐明）comparison conclusionPara1:Para2:Para3:Para4: Have a brief illustration of the topic. The problems caused by using plastic bags. The advanages of using cloth bags. Conclusion.The problems caused by plastic bags.white pollutionhard to break downbe harmful to our he

16、althThe advantage of using the cloth bags.can be used many timessave a lot of resourcesWe can make them by ourselves, which is very interestingOver the past half century, have become very common . welcomed them as a way to . Recently, however, we have been finding that they can cause damage to , even , to peoples health.What are some of the problems caused by ? First,With these discoveries, are beginning to turn to .Lets use., not only for ., but also.The following words may help you.Homework :Finish the writing .