CONTENTS:

Chapter-1 Crop Production and Management

Chapter-2 Microorganisms : Friend and Foe

Chapter-3 Synthetic Fibres and Plastics

Chapter-4 Materials : Metals and Non-Metals

Chapter-5 Coal and petroleum

Chapter-6 Combustion and Flame

Chapter-7 Conservation of Plants and Animals

Chapter-8 Cell- Structure and Functions

Chapter-9 Reproduction in Animals

Chapter-10 Reaching the Age of Adolescence

Chapter-11 Force

Chapter-12 Frication

Chapter-13 Sound

Chapter-14 Chemical Effects of Electric Currents

Chapter-15 Some Natural Phenomena

Chapter-16 Light

Chapter-17 Stars and Solar System

Chapter-18 pollution of Air and Water

Answes

Appendix-I Design of the Sample Question Paper

Appendix-II Sample Question Paper