Our Sky Class 4 Notes EVS Chapter 10

Students often refer to Class 4 EVS Notes and Chapter 10 Our Sky Class 4 Notes during last-minute revisions.

Class 4 EVS Chapter 10 Notes Our Sky

Class 4 Our Sky Notes

→ Sky: Sky is the space above the Earth that we see when we look up. It looks blue during the day and dark at night. We can see the Sun, Moon, stars, and clouds in the sky.

→ Light: Light helps us see. It comes from the Sun, bulbs, and lamps.

→ Heat: Heat makes things warm. It comes from the Sun, fire, and machines.

→ Sunset: The time when the Sun sets, and it starts getting dark.

→ Sunrise: The time when the Sun comes up in the morning and the day begins.

→ Shadow: A shadow is made when light is blocked by something.

→ Source of Light: Anything that produces light.

→ East: The direction from where Sun rises in the morning.

→ West: The direction in which Sun sets in the evening.

→ Sundial (Samrat Yantra): A device used long ago to tell time using sunlight. It had a stick that makes a shadow on a flat surface. As the Sun moves, the shadow moves and shows the time.

→ Shadow Puppetry: A way of telling stories using flat puppets behind a screen with light, forms moving shadows.

→ Twinkling: When a star or light looks like it is quickly shining and blinking again and again.

→ Poornima: It is the ‘Full Moon Day’. The Moon looks big, round, and bright in the night sky.

→ Arnavasyw: It is the ‘New Moon Day’. The Moon is not visible in the sky at night.

→ Periodically: Something that happens again and again after a regular interval of time.

→ Based on the appearance of the Moon we celebrate many festivals like Diwali, Raksha Bandhan, Guru Poomima, Eid, etc.

→ Chandrayaan: India’s special mission to Moon to study about its surface’ and gather maximum information.

→ Vikram Lander: It was a part of chandrayaan mission which landed on the surface of Moon on 23rd August, 2023 to gather more information about the surface of Moon.

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