Our Sky
CBSE · Class 4 · EVS
Summary of Our Sky for CBSE Class 4 EVS. Key concepts, important points, and chapter overview.
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Overview
The sky changes its look during the day and at night. The Sun gives light and heat, the Moon changes shape on different nights, and stars appear in patterns after sunset. Shadows also change with the Sun’s position. People have used the Sun, the Moon, and shadows to learn about time, festivals, and
Key Concepts
The Sun is the brightest object
The Sun is the brightest object in the sky. It gives light and heat. When the Sun is present in the sky, other stars cannot be seen. It appears to ris
A shadow is made when
A shadow is made when an object blocks light. If an object is close to the light source, the shadow is bigger. Morning shadows are long, noon shadows
The Sun appears to move from
The Sun appears to move from the East to overhead till noon and then gradually moves towards the West in the afternoon. The direction of the shadow ch
Ancient people used shadows to tell
Ancient people used shadows to tell time with a device called a sundial. The Samrat Yantra at Jantar Mantar is a sundial that can tell time accurately
Raja Jai Singh of Jaipur built
Raja Jai Singh of Jaipur built Jantar Mantar in Jaipur, Ujjain, Delhi, Varanasi, and Mathura.
Learning Objectives
- Describe how the sky looks in the morning, afternoon, and night.
- Recognize the Sun as the brightest object in the daytime sky and the Moon as a major object in the night sky.
- Explain how shadows change with the Sun and with the direction of light.
- Understand how ancient people used shadows to tell time with a sundial.
- Learn about moon phases such as Poornima and Amavasya.
Frequently Asked Questions
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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Syllabus
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