人教新課標高中模塊四 Unit Working on the land Period 5 Reading II教學課件 (共39張PPT)

1、人教新課標高中模塊四 Unit 2 Unit 2 Working the land Unit 2 Using language Reading Paragraph 1: Recently, however, scientists have been finding that long- term use of these fertilizers can cause damage to the land and, even more dangerous, to peoples health. Paragraph 2: What are some of the problems caused by

2、 chemical fertilizers? Paragraph 3:With these discoveries, some farmers and many customers are beginning to turn to organic farming. Paragraph 4: Organic farmers also use many other methods to keep the soil fertile. 1.Answer the following questions after reading the passage.P14 1.What is organic far

3、ming? 2.Why are chemical fertilizers so popular in farming today? 3.What problems can be caused by using chemical fertilizers? 4.What is the main reason for using organic farming methods? 1.What is organic farming? Organic farming means growing crops without using any chemicals. 2.Why are chemical f

4、ertilizers so popular in farming today? They are a great way to stop crop disease and increase production. 3.What problems can be caused by using chemical fertilizers? They can damage the land by killing helpful bacteria and pests and by staying in the ground and underground water for a long time. T

5、hey damage peoples health by building up in their bodies and leading to cancer or other illnesses. 4.What is the main reason for using organic farming methods? The main reason for using organic farming methods is to grow good food and to avoid damaging the environment or peoples health. Read paragra

6、ph 4 carefully and finish Exercise 2: Methods of organic farmingAdvantages of methods 1.Farmers use natural waste from animals 1.This makes the soil richer in minerals and so more fertile. 2.Farmers often change the kind of crop in each field every few years. 2.Changing the crops renews the minerals

7、 in the soil and helps it become rich and healthy. 3.Farmers plant crops with different lengths of roots. 4. Farmers sometimes plant grass between crops and leave it in the ground. 4.This prevents wind or water from carrying away soil and acts as a natural fertilizer. 3.This uses different levels of

8、 soil. Skim the passage to find its main idea. Write it down in your own words. Chemical fertilizers can cause many problems, so organic farming is becoming more popular Paragraph 1: Recently, however, scientists have been finding that long- term use of these fertilizers can cause damage to the land

9、 and, even more dangerous, to peoples health. Paragraph 2: What are some of the problems caused by chemical fertilizers? Paragraph 3:With these discoveries, some farmers and many customers are beginning to turn to organic farming. Paragraph 4: Organic farmers also use many other methods to keep the

10、soil fertile. Paragraph 1: Recently, however, scientists have been finding that long- term use of these fertilizers can cause damage to the land and, even more dangerous, to peoples health. In recent days, scientists have discovered that using chemical fertilizers for a long time can hurt the land a

11、nd also peoples health. rewrite Paragraph 2: What are some of the problems caused by chemical fertilizers? There are several problems caused by chemical fertilizers. Paragraph 3:With these discoveries, some farmers and many customers are beginning to turn to organic farming. Organic farming is becom

12、ing more popular with some farmers and many customers after these discoveries came out. Paragraph 4: Organic farmers also use many other methods to keep the soil fertile. There are many organic farming methods for making the land healthy and productive. Write your summary. First state the main idea

13、of the passage and then the topics covered by each paragraph. Remember, use your own words! In recent days, scientists have discovered that using chemical fertilizers for a long time can hurt the land and also peoples health. There are several problems caused by chemical fertilizers. They hurt the h

14、ealth of the land, stay in the water for a long time and get into peoples bodies through their food. Organic farming is becoming more popular with some farmers and many customers after these discoveries came out. Organic farming does not use any chemicals. There are many organic farming methods for

15、making the land healthy and productive. All of these methods try to produce good food and to keep the environment and people healthy. Suggest answer Swap summaries with your partner and give each other comments. Check your partners summary for the main idea and topic sentences. Some _ can cause dise

16、ase. People usually take some medicine to help them to recover. If someone makes a _ , he or she is the first person to find or become aware of something that no one knew about before. Stores of grain are frequently attacked by _, especially rats. Bacteria pest discovery nutrition root bacteria disc

17、overy pests Some vegetables are grown for their _ which are large and can be eaten. Nowadays people eat more food made of grain because of its_. roots nutrition Bacteria pest discovery nutrition root Lets learn the language points in Unit 2 together. Are you ready? Go! 1.These chemicals in the food

18、supply build up in peoples bodies over time. Traffic is building up on roads into the city. 來往的車輛在通往市區(qū)的路上越聚越多。來往的車輛在通往市區(qū)的路上越聚越多。 build up: become greater, numerous, or more intense 變得更大、更多或更強； 樹立；增進（健康） build up to: 增加；發(fā)展 Victor P23 EX： 我必須鍛煉身體。我必須鍛煉身體。 I have to build up my body. He went for an oce

19、an trip and soon build up his health. 他進行了一次航海旅行，很快增進了健康。他進行了一次航海旅行，很快增進了健康。 2.Many of these chemicals can lead to cancer or other illnesses. This misprint led to great confusion. 這個印刷錯誤造成很大的混淆。這個印刷錯誤造成很大的混淆。 lead to: have sth as its result 導致（某種）結(jié)果；造成 lead to：通向；領(lǐng)到；帶到 Victor P23 EX： We firmly belie

20、ve that war never settles anything. It only _ violence. A.runs into B. comes from C. leads to D. begins with 3.They focus on keeping their soil rich and free of disease. Please focus your minds on the following problem. 請集中精力思考下列問題。請集中精力思考下列問題。 Focus on : pay particular attention to 集中（注意 力、精力）于 Vic

21、tor P23 EX： All his attention was _ on one thing-how to solve the problem of water shortage. focused If the suns rays focus _ a dry leaf through a glass, it will start to burn. on Eating well and good exercise keep you free from/of cold. 健康飲食和鍛煉使你遠離感冒。健康飲食和鍛煉使你遠離感冒。 4.They feel that this makes the s

22、oil in their fields richer in minerals and so more fertile. This also keeps the air, soil, water and crops free from chemicals. Keepfree of /from: protect. from 使免受（影響； 傷害等） Keep (oneself) from doing sth. 克制自己不做某事克制自己不做某事 keep sth from sb 不想將某事告訴某人不想將某事告訴某人 5. reduce 減少；縮減 reduceby ：以以減少減少 reduce (f

23、rom) to ：（從（從）減少到）減少到 Victor P24 We bought a television whose price was reduced from $500 to $350. 我們買了一臺從我們買了一臺從500美元美元降價到降價到350美元的電視機。美元的電視機。 The prices of all the books are reduced by 20 percent. 所有書的價格都所有書的價格都降了降了20%。 EX： He has reduced his weight from 110 to 104 kilos, that is to say, he has re

24、duced his weight _ 6 kilos. A. to B. by C. from D. with Assignment 1.Finish the exercises on workbook. 2.Preview An Early Farmer Pioneer, finish off Ex1&2 in P53. Who is he? 1. What made Jia Sixie become interested in improving Chinese farming? He saw how some farms produced good crops and healthy animals and others did not. Re