Page 146 - Volt Elevate The World Around Us Book 4

12 Our Sky

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About the Chapter

The chapter introduces us to the wonders of the sky during the day and night. It explains how the
sun gives us light, heat, and helps plants, animals and humans survive. We learn about clouds,
how they are formed and their role in the water cycle. The chapter also explains why the sky
changes colour at different times of the day and the role of the atmosphere in scattering sunlight
and protecting us from harmful rays. Beautiful phenomena like the rainbow, the horizon and the
formation of shadows are also discussed. The night sky introduces us to the moon, its surface and
phases. We also read about the stars, constellations, and the Milky Way Galaxy. Finally, the chapter
highlights India’s proud achievement through the Chandrayaan missions, which have explored
the moon and helped in scientific discoveries.

Learn with Arnav and Sheila

Yes, it looks so beautiful. Wow! No wonder the
Do you know it happens sky looks so magical at
because sunlight scatters sunrise and sunset.
differently in the evening?

Look Sheila! The sunset
today has painted the sky
orange and pink.

Mindful Moments

Now answer the following questions.
y Why does the colour of the sky change during sunrise and sunset?

y What role does scattering of light play in making the sky colourful?

Analyse

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