Class 4 Evs - BIHAR
Our Sky
The chapter 'Our Sky' for Class 4 Bihar (BSEB) EVS (Our Wondrous World) introduces students to the wonders above us. Children learn about the sun, moon, stars, and clouds that make up our sky. The chapter explains why the sun shines brightly by day giving us heat and light, why the moon changes its shape through different phases, and why twinkling stars appear only at night. Understanding these celestial bodies helps young learners build basic scientific curiosity about day and night cycles, weather patterns, and our place in the universe, which are crucial for scoring well in board assessments.
Start Learning FreeKey Concepts
The Sun
A giant ball of hot burning gases that is the closest star to Earth, providing us with daylight, warmth, and energy.
The Moon
Earth's natural satellite that does not have its own light but shines by reflecting sunlight, changing its apparent shapes called phases.
Stars
Huge glowing balls of gas very far away in space that twinkle at night and appear small because of their massive distance from us.
Day and Night
The natural cycle caused by Earth's rotation, where the side facing the sun has day and the opposite side has night.
Clouds
Collections of tiny water droplets or ice crystals floating high up in the sky that bring us rain.
Important Formulas
Board Exam Info
In the Bihar (BSEB) Class 4 EVS examinations, this chapter generally carries around 4 to 6 marks. Common question types include fill in the blanks, matching the following (e.g., Sun with day, Stars with night), short answer questions about why the sun is important, and drawing or identifying different phases of the moon.
Frequently Asked Questions
Why do stars not shine during the day?
Stars are present in the sky during the day too, but the bright light of the sun is so strong that we cannot see them until the sun sets.
Does the moon change its actual shape?
No, the moon is always round. We only see different shapes, called phases, because of the changing amounts of sunlight reflecting off its surface as it moves around the Earth.
Why is the sun important for life on Earth?
The sun gives us light to see, heat to keep us warm, and helps plants make their food, making life possible on Earth.
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