Class 7 Science Chapter 4, The World of Metals and Non-metals, opens with a visit to a village ironsmith in Rajasthan making tawas, buckets and farming tools. It compares the physical and chemical properties of metals and non-metals and their uses in everyday life. What Class 7 Science Chapter 4 Covers 4.1 Properties of Materials … Read more
Class 7 Science Chapter 5, Changes Around Us: Physical and Chemical, explores why melting ice, folding paper, ripening bananas, rusting iron and burning magnesium behave differently, distinguishing physical changes from chemical changes and reversible changes from irreversible ones. What Class 7 Science Chapter 5 Covers 5.1–5.2 Physical vs Chemical Changes contrasts changes where only shape, … Read more
Class 7 Science Chapter 6, Adolescence: A Stage of Growth and Change, explains the physical, biological, emotional and social changes that take place during the teenage years and how nutrition, hygiene, exercise and positive habits make adolescence a healthy, joyful stage. What Class 7 Science Chapter 6 Covers 6.1–6.2 Growing With Age & Reproductive Capability … Read more
Class 7 Science Chapter 7, Heat Transfer in Nature, begins on a winter evening in Gangtok as siblings compare Sikkim’s cold climate with warm Kerala and watch thukpa cooking. It explains conduction, convection, radiation, land and sea breezes, and the water cycle with groundwater seepage. What Class 7 Science Chapter 7 Covers 7.1 Conduction of … Read more
Class 7 Science Chapter 8, Measurement of Time and Motion, follows 100-metre sprinter Prerna as she wonders how races are timed to fractions of a second. It covers ancient timekeeping devices, simple pendulums, SI units, speed calculations, and uniform vs non-uniform linear motion. What Class 7 Science Chapter 8 Covers 8.1 Measurement of Time traces … Read more