高中英语新课标必修四第二单元reading2电子教案

1、高中英语新课标必修四第二单元reading2natural fertilizer (animal waste)chemical fertilizerWords and espressions p1.chemical fertilizers化肥化肥 increase production增加产量增加产量 Long-term use of长期使用长期使用cause damage to对对造成伤害造成伤害 P2.stay in the ground 呆在土壤里呆在土壤里 wash off洗掉洗掉 lead to 导致导致build up 增强增强in addition另外另外be full of n

2、utrition充满营养充满营养 P3.organic farming 有机耕作有机耕作turn to转向转向focus on sth./doing sth.集集中注意力于中注意力于reduce disease减少病害减少病害keepfree from使使免于免于P4.every few years每隔几年每隔几年putback into把把 带到带到prevent from sth./doing sth.阻止阻止干干.natural fertilizer天然肥料天然肥料Fast readingPara 1.Para 2.Para 3.Para 4.Long-term use of_ fert

3、ilizers can cause damage to_.Skim the text, try to get the main idea of each paragraphTask 1Farmers and customers turn to_._ caused by chemical fertilizers.Other methods to keep_chemicalthe land and peoples healthProblemsorganic farming the soil fertile.Careful reading Read Part 1, try to find the p

4、roblems and causes of chemical farming, then fill the blanks.Task one ProblemsCausesdamage_affect _, _ and _.lead to _ and _.fruit, vegetables and other food have less _.by killing _ _by staying in the ground and underground waterby building up_ _by growing too fastthe land crops animals humans canc

5、er other illnessnutrition the helpful bacteria and pests as well as harmful ones. in peoples bodies over time Read Part 2, try to find the advantages of natural fertilizers then fill the blanks.Task two Natural fertilizersmake the soil _ _Reduces （ ）and helps crops( )Keeps( )free from chemicals Adva

6、ntages richer in minerals and so more fertile Read Part 3, try to find the methods and advantages of organic farming, then fill the blanks.Task three Methodsuse natural waste _ _make the soil _ _change _ _put _ back into _, making _ _plant different _ with different lengths of _Use different levels

7、of soil plant _ and then leave it _ _ prevent wind or water from carrying away the soil and become a natural fertilizer Advantages 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 cro

8、ps roots grass between crops in the ground Read the text again, then choose the best answer for the following questions.Task three1. 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

9、 from chemicals. C. It can kill harmful pests. D. It can make the soil richer in mineral.2. What is the advantage 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. 3. The organic farmers do the followings except _.A. adding fertilizers which is rich in mineralB. changing crops every two or three yearsC. planting seeds in different layers of the soilD. planting grass bet