Class 4 EVS (Our Wondrous World) Chapter 10, Our Sky, concludes the textbook by observing the changing sky across morning, afternoon, and night — tracking the Sun’s apparent East-to-West path, investigating why shadows are long in the morning/evening and shortest at noon, and observing star patterns and Moon phases (Poornima to Amavasya).
What Class 4 EVS Chapter 10 Covers
The Sun’s Daily Journey & Changing Shadows observes how the Sun rises in the East, comes overhead at noon, and sets in the West — causing long shadows pointing West in the morning, short shadows at noon, and long shadows pointing East in the evening.
Night Sky — Twinkling Stars, Poornima & Amavasya draws star patterns in the night sky and tracks the changing shape of the Moon across nights from full circle (Poornima / Full Moon) through crescent (‘C’ shape) to invisible (Amavasya / New Moon) and associated festivals.
Exercises in Chapter 10
- Let us Reflect, Think and Answer, and in-text observation questions.
- Hands-on classroom experiments, nature trail logs, and community interviews.
Read Class 4 EVS Chapter 10 Online
More Chapters
- Previous: Chapter 9: Different Lands, Different Lives
- Hindi medium: Class 4 EVS Chapter 10 PDF in Hindi (Hamara Adbhut Sansar)
- All EVS chapters and the other Class 4 books: Class 4 NCERT books 2026-27
- All Class 1 to 12 NCERT Textbooks: NCERT Books PDF (Class 1–12)
FAQ
Why do shadows change their length and direction from morning to evening?
Because the Sun appears to move from East in the morning to overhead at noon and West in the evening; shadows always fall on the side opposite to the light source, making them long in the morning and evening and shortest at noon.
What is the difference between Poornima and Amavasya?
Poornima (Full Moon night) is when the Moon appears as a complete bright circle in the night sky, whereas Amavasya (New Moon night) is when the Moon is not visible in the night sky at all.