Class 7 Science Notes, Chapter 18 Wastewater Story, PDF Free To Download.
- Chapter 1 Nutrition in Plants
- Chapter 2 Nutrition in Animals
- Chapter 3 Fibre to Fabric
- Chapter 4 Heat
- Chapter 5 Acids Bases and Salts
- Chapter 6 Physical and Chemical Changes
- Chapter 7 Weather Climate and Adaptations of Animals to Climate
- Chapter 8 Winds Storms and Cyclones
- Chapter 9 Soil
- Chapter 10 Respiration in Organisms
- Chapter 11 Transportation in Animals and Plants
- Chapter 12 Reproduction in Plants
- Chapter 13 Motion and Time
- Chapter 14 Electric Current and its Effects
- Chapter 15 Light
- Chapter 16 Water A Precious Resource
- Chapter 17 Forests Our Lifeline
- Chapter 18 Wastewater Story