ONLINE ASSIGNMENT

THEORETICAL BASE OF NATURAL SCIENCE EDUCATION EDU - 09AN ASSIGNMENT ON WORKBOOK FOR LEARNERSBASED ON THE FIRST CHAPTER OF CLASS VIIITH STANDARD

Submitted to : Geetha Teacher Submitted by Optional : Natural ScienceReshmi .V Reg NO : 13373014

INDEX

Sl.No.CONTENTPAGE NO.

1.INTRODUCTION1

2.AN ASSIGNMENT ON WORK BOOK FOR LEARNERS BASED ON THE FIRST CHAPTER OF CLASS VIIITH STANDARD2 - 4

3.CONCLUSION5

4.REFERENCE5

INTRODUCTIONScience workbook is an adjunct to science text book. For effective learning pupils should have opportunities for practicing what they have learned. Pupils work book, helpful to a practice material for pupils, the content of which is arranged in the order so the text book on which it is based. A work book contains summary of each chapter of the text book, exercises of different kinds, key to exercises and suggestions for practicals assignments and improvisation.Advantages1. Work book supplements classroom learning .2. It promotes self learning and self- assessment3. It provides for working out different types of assignments.4. It gives practice of classroom learning and thereby reinforces learning5. It promotes scientific thinking.

CONTENTThe first chapter of class VIII Agriculture : A way of life shows the importance of agriculture, how can we make the maximum utilization of the land, how can we lower the cost of production, Agriculture is not only the growing of plants alone but also the production of animals useful to human beings etc. There are so many issues that prevent agriculture from becoming profitable.Mined farming, hybridization, tissue culture, different hybrid varieties, agricultural research institutes, the use of different types of fertilizes, manure yielding microbes, integrated farming etc are helpful for improve corproduction and we can make the agriculture profitable. The diseases and pests prevent agriculture from becoming profitable, different methods of pest control better marketing and procurement facilities and the hints for making a vegetable gardens given in the table are also included in this chapter. I Find out the relation between the word pairs and fill in the blanks:1. Foot and mouth disease:Virus;.Bacteria.Ans: Anthran2. Quick wilt : pepper; Blight disease .Ans: Paddy

3. .; Factomphose ; Organicfertilizer : VermiwashAns: Chemicalfertilizes

4. Ornamental fish : Angel ; Prawn..Ans: Karrach5. Arecanut plant :; paddy : BlastdiseaseAns: Mahali6. Minorka :Domestic hen ; pekkins :..Ans: Domestic Duck7. Athulya : Kerala Agricultural University ; Indo Swiss project , Mattupetty :.Ans:Sunandini8. Malatheon.; Neem seed Kernal : Organic pesticide Ans: Chemical pesticideIIFind out the odd one and give the common characteristics of others1. Catla, Rohu, Black Mollie, carpAns: Black mollie others are edible variety fishes2. Jaya, Thriveni, Kuthiravaly, JyothyAns: Kuthiravaly - Others are varieties of paddy3. Blight disease, Root wilt, Bud rotAns: Blight disease others affect Coconut trees4. Minorka, Royans, Ankona, Grama LakshmiAns: Royans Others are fowl varietiesIII.Find out the reason:1. It is said that, frog should not be caught from paddy fields.Ans: Frog eat pests like rice hispa. So they play a role in pest control frog is a part of biological pest control method. 2Uncontrolled use of chemical pesticides and manures can destroy mankindAns: Usefulk micro organism, that are decomposers, are destroyed due to the effect of chemical pesticides and fertilizers. Due to this decomposition will not occur. The excess chemicals used in soil flows through the rain water and reach the rivers, strems etc. This water causes disease in human beings also.

IV.Arrange the column suitably. Avoid the unsuitable ones. Root wilt-PlantainBrown leaf spot disease-ArecanutMahali-PaddyBunchytop-CoconutAns:Root wilt-CoconutBrown leaf spot disease-PaddyMahali-ArecanutBunchytop-PlantainV1.Fly trap is an effective pest control method. How will you prepare a fly trap ? 2.A farmer uses plenty of chemical manure and chemical pesticides for growing vegetables to increase production. But for the vegitables for his own use, he uses only organic manures and organic pesticides. What is your opinion about his action ? Explain ?3.A good quality plantain is seen among a group of plantains. Write a method to develop its saplings within a short period of time .

CONCLUSIONFor effective learning, pupils should have opportunities for practicing what they have learnt. It provides for working out different types of assignments and it promotes scientific thinking. Work books of the latter type serve as a combined course of study, a study guid and a record book. REFERENCES:Science Education - by Dr. K. SivarajanBasic Science text book - Class VIIIScience Education - by Dr. T. K. Mathew and Dr. T. M mollykutty