Chemistry

This Chapter contains topics like Animal Fibres- Wool, Animals that Yield Wool, From Fibres to Wool, Animal Fibres- Silk, Life History of Silk Moth, From Cocoon to Silk, etc.

This Chapter contains topics like Introduction to Acids and Bases, Neutralisations, Neutralisations in Everyday Life, and Natural Indicators.

This Chapter contains topics like Physical Changes, Chemical Changes, Rusting of Iron, and Crystallisation.

This Chapter contains topics like Introduction to Soil, Soil Profile, Soil Types, Properties of Soil, Uses of Soil (Soil And Crops), etc.

This Chapter contains topics like Need and Consumption of Water, Sources of Water, Forms of Water, Groundwater- Important Source of Water, Depletion of Water Table, and Water Management.

This Chapter contains topics like Importance of Water, Wastewater treatment plant, Sanitation and Disease, Alternative Arrangement for sewage disposal, Sanitation at Public Places, Better Housekeeping Practices, and Sewerage System.