高一英語下Unit 19 Modern agriculture2課件

WelcomeUnit19Modern Agriculture Discuss the following questions with you partner. 1、Look at the pictures and compare traditional and modern farming. 2、What are the advantages and disadvantages of each way ? 3、What other changes have happened on farms in the last 100 years?agricultureagriculturefarmirrigationfoodcropfieldplantsplainfarminggrainfarmerfertilizer seedproducecountrysidelandarableland3、What other changes have happened on farms in the last 100 years?Over the last 100 years there have been some changes on farms and in agriculture:The use of machines,the use of chemical fertilizers,the use of insect killers,the use of food supplements in animal feed,the growth of the farms(bigger farms),doing the work with workers who are not part of family,growing different crops,etc. Scanning: Q1:What is the biggest problem to Chinese farmers? Q2:What does GM mean?China is a country with the largest population in the world,but only seven percent of the land can be used for farming.“G” stands for “genetically” from the world “genes”.“M” stands for “modified”,which means “changed”.Skimming Read the whole text .Find out the topic sentence in each paragraph.Para.1: For thousands of years traditional agriculture in China did not change very much.Para.5: Another technique tries to create plants that produce more and bigger fruit.Para.4: Using the latest technologies, Chinese scientists grow vegetables in greenhouses.Para.3: Not only is food production important but also taking care of the environment.Para.2: Over time, many farming techniques have been modernised.Para.6: The tomato is one of nearly 4,500 different plants that are genetically modified. 1.How much does arable land take up in China?2.How many ways are mentioned to make the land produce more?3.What does new techniques mean?4.When did scientist start to develop new techniques?5.How many unusual ways are mentioned to deal deal with the shortage of arable land?Questions:The most important technological changes in agriculture in China in history:1950s-1980s1980s-presentThe use of machines,eg tractorsThe use of electric pumps for irrigationThe use of chemical fertilisersThe use of insect killersThe use of special seedbedsThe use of greenhousesTo make vegetables bigger or betterTo change vegetables so they can grow on poor soilKnowledge from abroad Traditional farmingTraditional farming Agriculture Modern farming Agriculture Modern farming Hi-tech farming Hi-tech farming GGGGMfoodskindHow would you change it?Why do you want to change it in this way?fruitvegetablesanimalswater-melononionsheepGrow them like blocks instead of ballsMake sure they dont hurt your eyes anymoreTo have red woolEasier to store, takes less spaceEasier to peel and cutLooks funny and we needt dye wool to make clothesThrough GM it is possible to change fruit, vegetables and even animals. We can change the way they grow, where they can grow, how they will taste, what colour and what shape they will have. Work in groups and decide which fruits, vegetables and farm animals you would change. Explain how you will change them and why.Topics:What are the advantages and disadvantages of GM products?