NCERT Solutions for Class 4th The World Around Us Chapter 10 Our Sky
Updated on 2026-09-19
About this chapter
The sky looks different at different times of the day. The colour of the sky changes in the morning, afternoon and at night. Even the Sun’s colour appears to change. The activities of birds, animals, trees and humans change too. The Sun is the brightest object in the sky. It is so bright that other stars cannot be seen when it is in the sky. It gives us light and heat. It appears to rise, move up till it is overhead, and then go down on the other side. Shadows change through the day. Morning shadows are long, noon shadows are short and evening shadows are long again. Evening shadows fall in the opposite direction to morning shadows. A shadow follows the light. If the object is close to the source of light, the shadow is bigger. If the direction of the light changes, the direction of the sh
- Pictures of the Sky
- Sunrise and Sunset
- Interesting things about shadows
- The Shadows
- Position of the Sun and shadows
- Shadow formation by the Sun
- Patterns of stars
- Shapes of the Moon
- Festivals of the Sun and the Moon
- End-of-chapter questions
Quick revision
| Word | What it means | Where it comes in the chapter | Page |
|---|---|---|---|
| Sun | The brightest object in our sky; it gives us light and heat | Other stars cannot be seen while the Sun is in the sky | 153 |
| Sunrise | The time when the Sun appears in the morning | The sky turns orange and birds fly out of their nests | 154 |
| Sunset | The time when the Sun goes down in the evening | Birds return, lamps are lit and stars begin to appear | 154 |
| Shadow | The dark shape made when an object blocks the light | Your shadow runs with you and changes when you change your pose | 155 |
| Morning shadow | A long shadow, made when the Sun is low | The first of the three shadow pictures | 155 |
| Noon shadow | A short shadow, made when the Sun is overhead | The second of the three shadow pictures | 155 |
| East and West | The side the Sun appears from, and the side it goes down | The Sun appears to move from the East to overhead to the West | 157 |
| Sundial | A device that tells the time from a shadow | Samrat Yantra at Jantar Mantar, built by Raja Jai Singh of Jaipur | 158 |
| Pattern of stars | A shape we see when we join bright stars in the night sky | You draw a pattern you have seen and compare it with your friends’ | 159 |
| Poornima | The night when the Moon is a complete circle | Rakshabandhan, Guru Poornima and Buddha Poornima are full-Moon festivals | 160 |
| Amavasya | The night when the Moon is not visible at all | Diwali is celebrated on the day when there is no Moon in the sky | 161 |
| Chandrayaan | India’s mission to the Moon | The Vikram Lander landed on 23 August 2023 and collected data | 162 |
Exercises
- Pictures of the Sky — Draw Page 152
- Pictures of the Sky — Write Page 153
- Sunrise and Sunset — Discuss Page 154
- Interesting things about shadows — The Shadows Page 155
- The Shadows — Find out Page 156
- Position of the Sun and shadows — Draw Page 157
- Shadow formation by the Sun — Play with Shadows Page 158
- Patterns of stars — Night Sky Page 159
- Shapes of the Moon — Draw Page 160
- Shapes of the Moon — Discuss Page 160
- Festivals of the Sun and the Moon — Write Page 162
- End-of-chapter questions — Let us reflect Page 162–163