Unit 5 Working the Land Using Language Chemical Versus Organic Farming 课件 2023-2024学年高中英语人教版选择性必修第一册

Unit 5 Working the land Chemical versus Organic farming [ v s s] prep.与…相对;与…对阵 What can be used to make plants grow better? Fertilizer. Chemical fertilizers Natural waste from animals Lead-in To protect the crops, farmers have to kill off the harmful pests. Q:What is used for killing pests, especially insects? A:Pesticides. Organic Farming Organic farming is simply farming without using any chemicals. Chemical or organic farming? Which tomatoes do you prefer? 5 yuan / kg 30 yuan / kg Normal tomatoes Organic tomatoes 1. What is the text about? Chemical farming Organic farming pictures title 2. What type of writing is it? A. Narration(记叙文) B. Exposition(说明文) C. Argumentation(议论文) Pre-reading Fast reading Match the main ideas with the paragraphs Para 1-2 Para 3 Para 4 Para 5 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 chemicai farming Paragraph 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. D A bacteria and insects prohibited damage they cause grow too fast nutrition natural waste from animals Careful reading 9 Paragraph Main Idea Detail 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 . C B change the kind of crop every year different depths demand for food around the world 10 Comprehending 1.Why did many farmers welcome the introduction of chemical farming? A.Because it cost less than traditional farming. B.Because it can fight crop disease and increase production. C.Because it wasn’t harmful to people’s health or the land. D.Because it could make the soil richer in minerals. B 2.The following are the problems of chemical farming except . A.Pesticides can kill helpful bacteria and insects. B.Long term use of it will