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1、Unit 2 Working the land,Using language,2,3,1.Master the following new words, phrases and sentences in using language production, bacteria, pest , nutrition, discovery, soil, root regret, reduce, regret build up, keepfree from, lead to, focus on, in addition Some organic farmers prefer planting grass
2、 between crops to prevent wind or water from carrying away the soil 2. Learn the advantages of organic farming.,本课首先观看嘉世有机农业视频，引出本节题目“化学耕作还是农业耕作”。进而讨论化学耕作和有机耕作的概念。化学耕作的弊端是什么？为什么农民转而开始有机耕作？有机耕作通过什么方法来保持土地的肥沃？然后让学生听课文录音，了解短文的主旨以及各段的大意。最后讲解短文的语言点。最后通过改写的短文加深对本文的了解。 讲解农业耕作是配有相关的视频，有助于学生理解。总结概括文章和段落大意，提高
3、学生的理解和表达能力。听课文录音有助于学生听力水平的提高。,Reading,CHEMICAL OR ORGANIC FARMING?,What can we harvest?,No pains, no gains.,嘉世有机农业,Add fertilizer into the soil,How can farmers make the plants grow well?,How many kinds of fertilizers do farmers use?,natural fertilizer organic farming,chemical fertilizer chemical far
4、ming,Two kinds.,Discussion: Which kind of farming is better?,Better,Lets learn more about chemical and organic farming! Listen to the tape carefully.,using language reading,organic farming is becoming more popular.,The main idea of the text:,Fast Reading,Long-term use of chemical fertilizers can cau
5、se damage to the land and peoples health.,Problems caused by chemical fertilizers.,The main idea of each paragraph,P1.,P2.,Farmers and customers turn to organic farming.,Other methods to keep the soil fertile.,P3.,P4.,Careful Reading,Why are chemical fertilizers so popular in farming today? Because
6、they are cheap. They are a good way to stop crop disease and increase production. They can cause damage to the land. They do good to peoples health.,Paragraph I,Chemical farming,stop crop disease increase production,damage the land,by killing the helpful bacteria and pests as well as the harmful one
7、s.,affect crops,by staying in the ground and underground water for a long time,lead to cancer /illnesses,by building up in peoples bodies over time,have less nutrition,by growing too fast,Paragraph 2,Organic farming,Natural waste from animals,Make the soil richer in minerals and more fertile,A healt
8、hy soil,Reduce diseases in crops,Help crops grow strong and healthy,Paragraph 3,Organic farming,use natural waste,make the soil rich in minerals,change the crop,put minerals back into soil, making,plant crops with different roots,use different levels of land,plant grass between crops,preventfrom, a
9、natural fertilizer,Paragraph 4,1. Which statement is WRONG according to the text? A. All crops are organic. B. Recently, the term “organic farming” has gained another meaning. C. All farmers use fertilizers. D. Scientists believe some chemical fertilizers are better for people.,Read again and choose
10、 the best answer.,D,2. Which is not the reason why organic farmers prefer natural waste from animals? A. It can keep the food free from chemicals. B. It can keep the air, soil and water free from chemicals. C. It can kill harmful pests. D. It can make the soil richer in mineral.,C,3. What is the adv
11、antage of using chemical fertilizers? A. Leaving chemicals in the ground for a long time is good for water supply. B. They can get the soil exhausted. C. They can kill helpful bacteria. D. They can kill harmful pest.,D,4. The organic farmers do the followings except _. A. adding fertilizers which is
12、 rich in mineral B. changing crops every two or three years C. planting seeds in different layers of the soil D. planting grass between crops to prevent the soil from being blown away,A,1. What is “organic farming”?,Answer the questions.,It refers to crops growing with natural rather than chemical f
13、ertilizers.,2. What do organic farmers prefer to use as fertilizer?,Natural waste from animals.,Because peas and beans can put minerals back into the soil, making it rich and healthy and ready to grow more wheat or corn.,3. Why do organic farmers grow peas or soybeans after corn or wheat?,4. What is
14、 the main goal for using organic farming methods?,To grow good food and to avoid damaging The environment or peoples health., No use of chemical fertilizers Away from industrial areas Away from dirty water supply No air pollution,A summary of organic farming:,Fill in the blanks Many farmers welcome
15、_ fertilizers because they are great way to stop crop disease and increase _.But these chemical can _ to illnesses. So farmers began to turn to _ farming. They _ on keeping their soil rich and _ of disease. Organic farmers often prefer using _ waste of animals as fertilizer. This keeps the soil free
16、 _ chemicals. There are many methods to keep the soil _. The methods have the same goal: to grow good food and avoid damaging the _ or peoples health.,chemical,production,focus,free,natural,from,fertile,environment,lead,organic,1. These chemicals in the food supply build up in peoples bodies over time.,Language Points,Hard working conditions build up character.,build up 增强; 建立; 开发,艰苦的工作条件能磨练人的性格。,2. Many of th
