Unit5 Working the Land Using Language 课件 -2026-2027学年高中英语人教版选择性必修第一册

该高中英语课件围绕“化学农业与有机农业”主题，通过提问“农民使用何种肥料”“偏好哪种番茄”导入，从定义入手，逐步对比两种农业方式的优缺点、具体影响及现实挑战，搭建从基础概念到深度分析的学习支架。 其亮点在于融合语言能力（如“versus”“not only...but also...”等词汇语法讲解）、思维品质（对比表格归纳优劣势，问题链引导分析长期影响）和学习能力（知识点分层梳理与实例讨论）。采用对比分析法结合生活情境，帮助学生提升语言运用与批判性思维，教师可借助结构化内容高效开展读写教学。

Using language Reading for writing What kind of fertilizers do farmers use? chemical fertilizers natural fertilizers Chemical farming farming using chemical pesticides and artificial fertilisers. Organic farming simply farming without using any chemicals. chemical tomatoes organic tomatoes 2. What is getting popular on our table to maintain better health? Organic Farming is getting popular! 5 3. An introduction of organic farming 6 1. Look at the title and the picture on P55 and choose: What type of writing is this passage? A. narration 叙述 B. expository 说明，解释 C. argumentation议论 D. instructions说明 2. The passage is mainly to ____________ between chemical and organic farming compare the difference 7 2 课文知识点讲解 Chemical Versus Organic Farming 化学耕作与有机耕作 versus: used to compare two different ideas, choices, etc. （比较两种不同想法、选择等）与…相对，与…相比 Para1 Chemical pesticides杀虫剂 and artificial fertilisers肥料 have been in widespread use in farming since the middle of the 20th century. When they were first introduced, many farmers welcomed them as a great way to fight crop disease抵制作物病害 and increase production. Over time, however, what some scientists have found is that their long-term use can sometimes harm both the land and peoples’ health. 1. artificial adj.人工的 in widespread use 在广泛使用中 3. introduce:引进；介绍 4. a way to do sth =a way of doing sth 做某事的方式 5. over time 随着时间流逝 long-term 长期的 harm v.伤害 harmful adj. be harmful to 对……有害 自二十世纪中叶以来，化学农药和人工肥料便广泛应用于耕作。引入之初，二者被许多农民视为抵制作物病害、增加产量的好方法，因而颇受欢迎。然而，随着时间的推移，一些科学家发现，长期使用它们有时会危害土地和人类健康。 Para1 Chemical pesticides and artificial fertilisers have been in widespread use in farming since the middle of the 20th century. When they were first introduced, many farmers welcomed them as a great way to fight crop disease and increase production. Over time, however, what some scientists have found is that their long-term use can sometimes harm both the land and peoples’ health. Para2 For example, pesticides can damage the land by killing not only harmful bacteria and insects昆虫, but also helpful ones. In addition, these chemicals can stay in the soil and underground water sources地下水源 for a long time. This affects the crops grown on the land and, in turn, the animals and humans who digest them. Many people worry that these chemicals may make them ill and even cause cancer. In fact, some pesticides like DDT have been prohibited in most countries because of the damage they cause to people and the environment. As for chemical fertilisers, crops grown with them usually grow too fast to be rich in nutrition. They may look beautiful on the outside, but inside there is usually more water than essential minerals, and they often have less flavour风味 as well. 1. not only……but also…… 不仅……而且…… in addition 另外 affect v.影响 effect n.影响 have an effect on 对……有影响 ill adj.生病的 illness n.疾病 prohibit v.禁止 as for 至于 5. too ---to ---太而不能 as well 也，还 例如，农药在杀死有害细菌和昆虫的同时，也会杀死有益的细菌和昆虫，从而破坏土地。此外，这些化学品会长期残留于土壤和地下水源中。这会影响土里种植的作物，继而影响消化这些作物的人畜。很多人担心这些化学品会致病，甚至引发癌症。事实上，由于对人类和环境有害，“滴滴涕”等农药在大多数国家已被禁用。至于化学肥料，用其施肥的作物通常生长过快而营养不足。此类作物外表靓丽，而内里却经常是水分多于必需矿物质，并且往往口感较差。 Para2 For example, pesticides can damage the land by killing not only harmful bacteria and insects, but also helpful ones. In addition, these chemicals can stay in the soil and underground water sources for a long time. This affects the crops grown on the land and, in turn, the animals and humans who digest them. Many people worry that these chemicals may make them ill and even cause cancer. In fact, some pesticides like DDT have been prohibited in most countries because of the damage they cause to people and the environment. As for chemical fertilisers, crops grown with them usually grow too fast to be rich in nutrition. They may look beautiful on the outside, but inside there is usually more water than essential minerals, and they often have less flavour as well. Chemical farming Para1-2 1. Why did many farmers welcome the introduction of chemical farming?(Para1) Advantages: Many farmers welcomed them as a great way to fight crop disease and increase production. 2. What concerns many people about the use of pesticides?(Para1) Disadvantages: Their long-term use can sometimes harm both the land and people’s health. 3. What is one problem with the use of chemical fertilisers?(Para2) Disadvantages: Crops grown with them usually grow too fast to be rich in nutrition. Para3 As an alternative, some farmers have switched to organic farming, and many customers have turned to organic food when they shop at the local grocery. Organic farming is simply farming without using any chemicals. Organic farmers focus on keeping their soil rich and free of disease through natural means. For example, many organic farmers use natural waste from animals as fertiliser. This makes the soil in their fields richer in minerals. It also keeps the air, soil, water, and crops free of chemicals. switch to/turn to 转向，转变 customer n.顾客 local grocery 当地的杂货店 focus on doing sth 集中于做某事 4. keep---free of--- 使---免受--- 5. natural means 天然的方法 waste v.浪费 n.废物，垃圾 18 作为一种替代方法，有些农民已经转向有机耕作，而且许多消费者在当地食杂店购物时，也转而选择有机食品。有机耕作就是不使用任何化学品的耕作。有机耕作的农民注重通过天然的方法保持土壤肥沃，没有病害。例如，许多有机耕作的农民使用天然的牲畜粪便作为肥料，使农田土壤富含矿物质，也避免化学品进入空气、土壤、水源和作物。 Para3 As an alternative, some farmers have switched to organic farming, and many customers have turned to organic food when they shop at the local grocery. Organic farming is simply farming without using any chemicals. Organic farmers focus on keeping their soil rich and free of disease through natural means. For example, many organic farmers use natural waste from animals as fertiliser. This makes the soil in their fields richer in minerals. It also keeps the air, soil, water, and crops free of chemicals. 19 Para4 Organic farmers also use many other methods方法 to produce rich soil. They often change the kind of crop grown in each field every year. For instance, they may grow corn玉米 or wheat in a field one year, and then grow beans豆类 there the next. Why different crops are grown is because they put important minerals back into the ground, making it ready for the next batch批 of crops. Organic farmers also plant diverse crops that use different depths of soil to help keep it rich. For example, peanuts花生 grow on the ground’s surface表面, but many other vegetables put down deep roots. The goal of using different organic farming methods is to grow good food while avoiding damage to the environment or to people’s health. 1. for instance =for example 例如 diverse adj.多样的 4. put down deep roots 扎根深处 5. The goal ---is to do 目的是做某事 avoid v.避免 damage v/n.损害 do damage to 对 ---造成损害 20 有机耕作的农民也采用许多其他方法维持土壤肥沃。他们通常每年更换每块农田种植的作物种类。例如，他们可能一年在田里种植玉米或小麦，第二年改种豆类。种植不同作物的原因，是为了把重要的矿物质重新放回土壤之中，让土壤为下一批作物(的种植)做好准备。有机耕作的农民也种植土壤深度要求不同的多样化作物，以保持土壤肥沃。例如，花生长在土壤表层，而许多其他蔬菜则扎根于土壤深处。采用不同的有机耕作方法，目的在于生产优质食物，同时避免损害环境和人类健康。 Para4 Organic farmers also use many other methods to produce rich soil. They often change the kind of crop grown in each field every year. For instance, they may grow corn or wheat in a field one year, and then grow beans there the next. Why different crops are grown is because they put important minerals back into the ground, making it ready for the next batch of crops. Organic farmers also plant diverse crops that used different depths of soil to help keep it rich. For example, peanuts grow on the ground’s surface, but many other vegetables put down deep roots. The goal of using different organic farming methods is to grow good food while avoiding damage to the environment or to people’s health. 21 Organic farming Para3-4 4. How is organic farming different from chemical farming?(Para3) Organic farming is simply farming without using any chemicals. Organic farmers focus on keeping their soil rich and free of disease through natural means. 5.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 different depth of soil to keep it rich. 6. What's the goal of using organic farming methods?（Para4） Advantages: The goal of using different organic farming methods is to grow good food while avoiding damage to the environment or to people's health. Para5 Some people would prefer to stop the use of man-made chemicals in agriculture entirely. What keeps them from doing so is the fact that chemical farming serves the high demand需求 for food around the world. Organic farming is nowhere near able to meet that need. Therefore, there is still a long way to find a suitable solution that puts sufficient food on the dinner table while keeping people and the environment as healthy as possible. 1. prefer to do sth 更喜欢做某 prefer to do rather than do 宁愿做 ---而不愿做 --- 2.keep sb from doing 阻止某人做某事 3.serve the demand for 满足对------需要 4. nowhere near 远没有 suitable adj.合适的 sufficient adj. 充足的=enough as healthy as possible 尽可能健康 as soon as possible 尽可能快 26 有些人宁愿在农业中彻底停止使用人工化学品。他们不能如愿的原因是化学耕作满足了全世界对食物的高需求，而有机耕作还远远不能满足这一需求。因此，想要找到一个合适的解决方案，使人类和环境尽可能保持健康，又让人们有足够的食物可吃，这还有很长的路要走。 Para5 Some people would prefer to stop the use of man-made chemicals in agriculture entirely. What keeps them from doing so is the fact that chemical farming serves the high demand for food around the world. Organic farming is nowhere near able to meet that need. Therefore, there is still a long way to find a suitable solution that puts sufficient food on the dinner table while keeping people and the environment as healthy as possible. 27 chemical farming Thinking organic farming advantages disadvantages fight crop disease increase production lower cost crops look beautiful outside ...... good food avoiding damage to the environment or to people's health ...... harm the land harm people’s health harm the environment crops are less in nutrition ...... cannot meet the demand for food more efforts and higher cost smelly gases ...... Thank you for your watching $