CONTENTS
Chapter 1 CHEMICAL REACTIONS AND EQUATIONS (PAGE 1)
Chapter 2 ACIDS BASES AND SALTS (PAGE 9)
Chapter 3 METALS AND NON -METALS (PAGE 18)
Chapter 4 CARBON AND ITS COMPOUNDS (PAGE 28)
Chapter 5 PERIODIC CLASSIFICATION OF ELEMENTS (PAGE 38)
Chapter 6 LIFE PROCESSES (PAGE 48)
Chapter 7 CONTROL AND COORDINATION (PAGE 57)
Chapter 8 HOW DO ORGANISMS REPRODUCE (PAGE 65)
Chapter 9 HEREDITY AND EVOLUTION (PAGE 73)
Chapter 10 LIGHT -REFLECTION AND REFRACTION (PAGE 79)
Chapter 11 HUMAN EYE AND COLOURFUL WORLD (PAGE 86)
Chapter 12 ELECTRICITY (PAGE 90)
Chapter 13 MAGNETIC EFFECTS OF ELECTRIC CURRENT (PAGE 97)
Chapter 14 SOURCES OF ENERGY (PAGE 102)
Chapter 15 OUR ENVIRONMENT (PAGE 106)
Chapter 16 MANAGEMENT OF NATURAL RESOURCES (PAGE 111)
ANSWERS (PAGE 117)
Appendix -I (PAGE 179)
Appendix -II (PAGE 209)
Appendix -III (PAGE 210)