16 Questions
What is the North Star also called?
The Pole Star
What is the word 'planet' derived from?
A Greek word for 'wanderers'
What is the function of the North Star?
To indicate the north direction
What is the purpose of the imaginary line drawn joining the pointer stars?
To locate the position of the Pole Star
What is the Saptarishi?
A group of seven stars
What is the Earth?
A planet that gets heat and light from the Sun
What is the function of the stars in the night sky?
To determine directions during the night
What is the moon?
A satellite that moves round the Earth
What is the reason why we can't see the moon and other bright objects during the day?
The bright light of the sun prevents us from seeing them.
What is the term for the night when the full moon is visible?
Poornima
What are the celestial bodies that are very big and hot, made up of gases, and emit their own heat and light?
Stars
Why do the stars appear as tiny twinkling objects in the night sky?
Because they are very far away from us
What is the purpose of the experiment with the torch and the paper?
To simulate the appearance of stars in the night sky
What happens to the dots of light on the wall when the lights in the room are switched on?
They become almost invisible
What is the term for the night when the moon is not visible at all?
Amavasya
What is the common characteristic of the sun and the stars?
They are both very big and hot, made up of gases, and emit their own heat and light
Study Notes
Celestial Bodies
- Celestial bodies are objects in the night sky, including the moon, stars, and other shining objects.
- The moon appears at different times, in different shapes and positions, and can only be seen in its full form once a month (Full Moon or Poornima).
- A fortnight later, the moon is not visible at all (New Moon or Amavasya).
- The sun's bright light makes it difficult to see celestial bodies during the day.
Stars and the Sun
- Celestial bodies that are very big and hot, made up of gases, are called stars.
- Stars emit their own heat and light in large amounts.
- The sun is a star, and countless twinkling stars in the night sky are similar to the sun.
- Stars appear tiny because they are very far from us.
Constellations and the North Star
- Constellations are patterns formed by different groups of stars.
- The Saptarishi (Big Bear) is one such constellation, with seven stars that form part of the Ursa Major constellation.
- The North Star (Pole Star) indicates the north direction and remains in the same position in the sky.
- The North Star can be located using the Saptarishi constellation.
Planets and Satellites
- Celestial bodies that do not have their own heat and light, but are lit by the light of stars, are called planets.
- The word "planet" comes from the Greek word "Planetai," meaning "wanderers."
- The Earth is a planet, getting its heat and light from the sun.
- Satellites, like the moon, orbit around planets and are lit by the light of stars.
This quiz explores the visibility of the moon and other celestial objects in the night sky, including the full moon, new moon, and shapes of the moon.
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