Chapter 9 of Class 5 EVS (Our Wondrous World), Rhythms of Nature, explores day and night, seasons, and how natural cycles shape our lives.
Key Concepts
Different speeds of change: some changes happen over years, some every few years, some yearly, and some in minutes or seconds.
Day and night: caused by the Earth’s rotation — modelled in class using a globe and a light source.
India’s traditional seasons: vary by region across the country.
Quick Recap
- Keeping a nature journal is a simple way to notice slow changes — like trees growing or seasons shifting — that are easy to miss day to day.
- Day and night happen because the Earth spins on its axis, not because the Sun moves around the Earth.
Common Mistake to Avoid
Thinking the Sun moves around the Earth to cause day and night — it’s actually the Earth’s own rotation that brings different parts of it into and out of sunlight.
Frequently Asked Questions
Why does a globe-and-light demonstration help explain day and night?
It shows visually that only the half of the Earth facing the light source has “day,” while the other half has “night,” as the globe turns.
What is the point of keeping a nature journal?
It trains you to notice slow, easy-to-miss natural changes over time, like growth, seasonal shifts, or changes in your surroundings.
Full walkthrough: Chapter 9 Solutions · Extra Questions.
