【课件】Unit5Using+Language人教版高中英语选择性必修第一册.pptx

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1、Chemical or Organic Farming?Enjoy some pictures vegetables&fruits vegetables&fruitsChemical or Organic Farming Book4 Unit2 Have you ever bought any tomatoes or carrots online?organicListen to the radio What is chemical farming?What is organic farming?fertilizer chemical fertilizers natural fertilize

2、rs chemical farming organic farming chemical fertilizers natural fertilizersBetter？What is chemical farming?Using chemical fertilizers in farming.What is organic farming?It is simply farming without using any chemicals.01Fast Reading Find out the topic sentence of each paragraph.Task 1 SkimmingEffec

3、t of chemical fertilizerProblems caused by chemical fertilizers.P1.P2.Farmers and customers turn to organic farming.(advantages)Other methods to keep the soil fertile.P3.P4.Match the main idea of each paragraph.Find out the main idea of the passage by filling in the blanks._ _can cause many problems

4、,so _ _is becoming more popular.Chemical fertilizers farmingorganic 02 Careful Reading 1.Why are chemical fertilizers so popular in farming today?A.Because they are cheap.B.They are a great way to stop crop disease and increase production.C.They can cause damage to the land.D.They are benefit for pe

5、oples health.Task 2 Paragraph 1 What problems are caused by chemical fertilizers?Careful readingParagraph 2 First,they can.They also stay in the ground In addition,it usually grows too fast Tips:Here are the problems caused by chemical fertilizers.ChemicalsDamage the landStay in the waterAffect crop

6、s,animals and humansbuild updamage peoples healthMake the food short of nutritionFirst,.In addition,.also.therefore1.What is organic farming?1.Organic farming is farming without using any chemicals.Haha,weve turned to organic farming.Paragraph 3&4 2.What are the advantages of organic farming?The far

7、mers focus _ keeping their soil rich,_ (reduce)disease and _(keep)the air,soil,water and crops free _ chemicals.Paragraph 3 onreducingkeeping from The methods to keep the soil fertile Tips:1.They often prefer using natural waste from animals as fertilizer.2.Then often change 3.They also plant crops

8、4.They prefer planting grass Paragraph 3&4 The methods to keep the soil fertile Using 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 da

9、maging the environment or peoples health.Paragraph 3&412341.From the passage,we can see organic farmers are those who_.A.grow crops with chemical fertilizers B.grow crops with natural fertilizers C.chemical and natural fertilizers D.care for the environment Choose the best answers.2.According to the

10、 text,the tomatoes in picture_ are probably organic ones.A.B.03 Post Reading Write a summaryRecently,scientists have discovered that _.Chemicals damage the land by_.They hurt peoples health by _.Therefore,_.Organic farming is _.There are many methods to keep the soil fertile.Animal waste:keep free f

11、romEvery few years:Use different levels of soil:Prefer planting grass between:The goal:_Retelling Retell the text according to the chart:Organic farmingI.Organic farmingnatural/chemical fertilizersII.Farmers prefer natural waste from animals.Natural fertilizerChemical fertilizer1.makericher and more fertile2.reduceand helpgrow3.air,soil,water,food supplyfree from chemicals1.leavingis not good2.growyear after year3.kill bacteria&pestsHomework:Write a summary of this passage using your own words