Chapter 9 — Rhythms of Nature

Chapter 9 of the Class 5 The World Around Us NCERT textbook (Our Wondrous World), "Rhythms of Nature", explores how the world changes around us through day and night, seasons, and the repeating patterns that shape plant life, animals, weather, and human activities — download the PDF and read a summary of India's six seasons, the cause of day and night, seasonal festivals, and hands-on journaling activities.

• Day and Night: Earth's Rotation — The chapter explains that the Sun does not move across the sky — it is the Earth that rotates on its axis. A torch-and-globe activity demonstrates how one side of the Earth faces the Sun (day) while the other side is in darkness (night).
• Seasons and Their Repeating Patterns — Seasonal change is described as a natural rhythm that repeats every year. India experiences six seasons: Vasanta (Spring), Grishma (Summer), Varsha (Monsoon), Sharad (Autumn), Hemant (Pre-winter), and Shishir (Winter), each bringing distinct changes to plants, animals, weather, and human life.
• Nature, Crops, and Festivals — The chapter connects seasons to farming and culture, showing that farmers grow different crops depending on the season and that many Indian festivals — such as Pongal, Holi, Diwali, and Baisakhi — are tied directly to seasonal and harvest cycles.
• Observing Change Over Time — Students are guided to track changes across four time periods (April–June, July–September, October–December, January–March) using a classroom seasons chart covering themes like plant life, birds and animals, air and heat, water bodies, and human activities.

1. 01It is the Earth that rotates, not the Sun — this rotation causes day and night, as shown through a torch-and-globe classroom demonstration.
2. 02India celebrates over 1,000 festivals throughout the year, many of which are connected to seasonal and harvest cycles.
3. 03India has six seasons: Vasanta, Grishma, Varsha, Sharad, Hemant, and Shishir.
4. 04India hosts both the wettest place on Earth (Mawsynram in Meghalaya) and one of the driest (the Thar Desert), showing how seasons differ across regions.
5. 05Dong in Arunachal Pradesh is known as India's First Village of the Sunrise — the first place where the Sun's rays touch Indian land each morning.
6. 06In Odisha, farmers know the rains are coming when the koel (cuckoo) bird starts singing — a natural sign they use to decide when to plant seeds.
7. 07Seasons shape what people eat, wear, grow, and celebrate — connecting nature to everyday human life in a repeating annual cycle.