Chemistry

This chapter covers topics such as Types of Chemical Reactions, Crystallisation, Chemical Changes, Physical Changes, and Rusting of Iron.

This chapter covers topics such as Salts and Its Types, Neutralisations in Everyday Life, pH of Solution, Natural Indicators, Neutralisations, and Introduction to Acids and Bases.

This chapter covers topics such as From Fibres to Wool, Animal Fibres: Silk, Animals that Yield Wool, Animal Fibres: Wool, Classification of Fibres, Sericulture, From Cocoon to Silk, Life History of Silk Moth, and Animal Husbandry.

This chapter covers topics such as Uses of Soil (Soil And Crops), Soil Types, Soil Profile, Soil Pollution, Introduction to Soil, Properties of Soil, and Composition of Soil.

This chapter covers topics such as Water Cycle, Water Management, Forms of Water, Need and Consumption of Water, Groundwater: Important Source of Water, Depletion of Water Table, Dams, and Sources of Water.

This chapter covers topics such as Alternative Arrangement for Sewage Disposal, Wastewater Treatment Plant, Importance of Water, Sanitation at Public Places, Biogas, Better Housekeeping Practices, Sewerage System, and Sanitation and Disease.