人教版（2019）高中英语选择性必修第一册Unit 5 Working the Land Using language for writing课件(14张ppt)

1、Reading for WritingChemical Versus Organic Farming（表示两队）对; 与相对/ 比较It is fertilizer. What is the substance we put on the soil to make crops grow?Pre-readingWhat kind of fertilizers do farmers use?chemical fertilizers natural fertilizersorganic farmingchemical farmingorganic farmingorganic farmingchem

2、ical farmingorganic farmingA. What organic farming is B. Why man-made chemical are still used in farming C. Organic methods for producing rich soilD. The problems with chemical farming Para. 1-2 Para. 3 Para. 4 Para. 5 Read the text and then Match the main idea with each paragraph.Chemical farmingOr

3、ganicfarmingThinking (Para.1-2)chemical farmingAdvantages Disadvantages 1. 2. harming the : killing harmful _ as well as _ staying in the _ and _ for a long time. harming _ : These chemicals may make people _and even_ harming the _ Crops grow too fast to be _.bacteria and insectsthe helpful onesillr

4、ich in nutritioncause cancerfight crop diseaseincrease productionwater sourceslandcropspeoples healthsoilundergroundAs an alternative, Id like to switch to organic farming!What is organic farming and how is it different from chemical farming?Organic farming is simply farming without using any chemic

5、als.Organic farmers focus on keeping their soil rich and free of disease through natural means.What are the organic methods mentioned in the text?(Para3&4)1. use natural waste from animals as fertilizer.2. change the kind of crop grown in each field every year.3. plant diverse crops that use differe

6、nt depth of soiluse natural waste from animals as fertilizerchange the kind of crop grown in each field every year.to put important minerals back into the ground to make the soil in the fields richer in mineralsplant diverse crops that use different depth of soil.to keep the soil richMethods Purpose

7、s Whats the goal of using different organic farming methods?（Para.4）The goal of using different organic farming methods is to grow good food while avoiding damage to the environment or to peoples health.Why cant we stop the use of man-made chemicals in agriculture entirely? A. Organic farming cost u

8、s a lot of money. B. Organic farming can meet peoples need. C. Chemical farming brought us huge profit. D. Chemical farming helps serve the need for food. （Para.5）paragraphmain ideadetail1-2DPesticides can kill helpful_Some pesticides have been_because of the _Crops grown with chemical fertilisers u

9、sually _ to be full of_3AMany organic farmers use _ as fertiliser.bacteria and insectsnutritionnatural waste from animalsprohibitedthe demage they cause to people and environment grow too fast4CThey often _ grown in each field _They also plant crops that use _ of the soil to help keep it rich.5BOrganic farming is now nowhere near able to meet high_change the kind of cropto produce rich soildiverse depthdemand for foodWritingTopic sentence: In my opinion,