【县级公开课课件】人教新课标必修四 Unit 2 Working the land-Using language

1、Module 4 Unit 2学校：尤溪县第五中学Designer: Xiao ZiquanWords preview 使迷惑使迷惑/为难为难 遗憾、后悔遗憾、后悔 化学物质化学物质 有机的有机的 生产、制造生产、制造 细菌细菌 害虫害虫 营养营养/食物食物 矿物、矿石矿物、矿石 发现、发觉发现、发觉 土壤土壤 confuseregretchemicalorganicproductionbacteriapestnutritionmineraldiscoverysoilWords preview 减少减少/缩减缩减 根、根源根、根源 浏览、略读浏览、略读 划底线标出、强调划底线标出、强调 总结总

2、结/摘要摘要 评论、议论评论、议论 生产者、制片人生产者、制片人 工业的、产业的工业的、产业的reducerootskimunderlinesummarycommentproducerindustrialAChemical fertilizersBNatural fertilizersNatural waste from animals and dead plantsNow, which one do you prefer?ABIts a product of organic farming.AIts a product of chemical farming.BTask1: Read and

3、 match the main idea of each paragraph.B. Long-term use of chemical fertilizers can harm the land and peoples health.D. Farmers and customers turn to organic farming.C. Organic farming methods to keep the soil fertile. A. Problems caused by chemical fertilizers.P1.P2.P3.P4. Part 1 (Para.1-2) Chemica

4、l farming part 2 (Para. 3-4) Organic FarmingDivide the text into two parts.？Task 1: Read the passage quickly and finish the following questions.1.From the passage, we can see organic farmers are those who_. A. grow crops with chemical fertilizers. B. grow crops with natural fertilizers C. produce or

5、ganic fertilizers D. care for the environment2.Organic farmers prefer _ A. chemical fertilizers B. natural fertilizers C. natural and chemical fertilizers D. some kind of chemical fertilizers.3. _ so that the soil may not get exhausted. A. Farmers grow the same crop year after year B. Farmers use na

6、tural fertilizers C. Farmers change crops every few years D. Farmers use chemical fertilizers4. According to the text, we know that organic farmers keep theirsoil rich and healthy in _ ways. A. 2 B. 3 C. 4 D. 5Task2: Para 1. Read and answer.n What advantages does chemical farming have? Chemical farm

7、ing can stop crop disease and increase production. Task 3: Read Para 2, try to find the problems and causes of chemical farming, then fill the blanks. ProblemsCausesdamage_affect _, _ and _.lead to _ and _.fruit, vegetables and other food have less _.by killing _ _by staying in the ground and underg

8、round 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 time Task4: Para. 3 True or False1. Organic farming means farming without using any chemicals.2. Organic farmers p

9、refer using fertilizers to make the soil richer in minerals. 3. Farmers want to keep their soil fertile and free of disease.4. Organic farming would pollute the environment.natural waste from animalsnot pollute the TTFF Task 5 Read Part 2, try to find the methods and advantages of organic farming as

10、 well as the way to keep the soil fertile, then fill the blanks. 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 _ _ prevent wind or water from carrying away the soi

11、l and become a natural fertilizer 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 Advantages The methods to keep the soil fertile： using

12、 natural waste from animals as fertilizer. changing the kind of crop in each field . planting crops to use different levels of soil. planting grass between crops to prevent The same goal : _ to grow good food and avoid damaging the environment or peoples health.1234AAfter reading, please tell me: 1.

13、 Is it chemical or organic farming?2. How do you know?Situation 1: The farmer is using fertilizers to keep the vegetable free from pest.Chemical farmingSituation 2: Lao Wang grows soybeans in his field last year and grows corns this anic farmingGrow different crops every year.Situation 3: La

14、o Li throw the nitrogen fertilizer(氮肥氮肥) in his field to make his soil rich in minerals.Chemical farmingUse chemicalsSituation 4: Li Hua only use natural fertilizers to grow his cabbage. Thats why his cabbage is damaged by pests.Organic farmingHomework: lWrite down your opinions about Organic Farming (or Chemical Farming) in a short passage.lLearn the useful new words and expressions in this part by heart. Expressions preview 在过去的半个世纪在过去的半个世纪 long-term increase production 地下水地下水 导致导致 focus on turn to 每隔几年每隔几年over the past