Class 4 (SSC) • EVS भाग 1 - विज्ञान (परिसर अभ्यास)Chapter 13: Day and Night⭐ Topic 1
Day and Night
Day and night occur due to the Earth's rotation on its axis, causing different parts of the Earth to face or turn away from the sun.
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The Earth rotates on its axis once every 24 hours, causing the part facing the sun to experience day and the part facing away to experience night.
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Remember these!
- Earth rotates on its axis every 24 hours.
- Facing sun = day; facing away = night.
- Rotation creates day-night cycle.
- Regions move gradually into light/darkness.
- Sun appears to rise in east, set in west.
- Actually, Earth is moving, not the sun.
- This is Earth's rotation effect.
- Understanding this explains our daily cycle.
Words to know
day and nightssc std 4