At Bodhiclasses, we nurture the spirit of curiosity and help learners look Beyond Earth. Whether it’s identifying constellations, learning about planets, or understanding how light pollution hides the stars—we’re here to make your learning journey cosmic and clear. This post brings you carefully curated extra questions and answers, designed to strengthen your understanding of NCERT Class 6 Science Chapter 12 and help you excel in exams and beyond.
Multiple Choice Questions (MCQs) with Answers
- Which of the following is NOT a planet?
(a) Mars
(b) Pluto
(c) Sirius
(d) Neptune
📝 Answer: (c) Sirius - The Pole Star is found in the constellation called:
(a) Orion
(b) Ursa Minor
(c) Canis Major
(d) Taurus
📝 Answer: (b) Ursa Minor - Which planet is known as the Red Planet?
(a) Jupiter
(b) Mars
(c) Venus
(d) Saturn
📝 Answer: (b) Mars - The star that appears stationary in the sky is:
(a) Sirius
(b) Betelgeuse
(c) Aldebaran
(d) Pole Star
📝 Answer: (d) Pole Star - Which star is the brightest in the night sky?
(a) Sirius
(b) Polaris
(c) Sun
(d) Proxima Centauri
📝 Answer: (a) Sirius - The Sun is a:
(a) Planet
(b) Star
(c) Asteroid
(d) Comet
📝 Answer: (b) Star - Which object revolves around a planet?
(a) Star
(b) Satellite
(c) Galaxy
(d) Constellation
📝 Answer: (b) Satellite - The term “Evening Star” is used for:
(a) Mars
(b) Jupiter
(c) Venus
(d) Saturn
📝 Answer: (c) Venus - The belt of Orion is represented by:
(a) Two stars
(b) Five stars
(c) Three stars
(d) One star
📝 Answer: (c) Three stars - Chandrayaan-3 landed successfully in:
(a) 2019
(b) 2008
(c) 2023
(d) 2025
📝 Answer: (c) 2023 - The planet with the most moons is:
(a) Mars
(b) Jupiter
(c) Venus
(d) Earth
📝 Answer: (b) Jupiter - Which planet is called the Blue Planet?
(a) Earth
(b) Uranus
(c) Neptune
(d) Saturn
📝 Answer: (a) Earth - A galaxy is made up of:
(a) Planets
(b) Stars
(c) Moons
(d) All of these
📝 Answer: (d) All of these - Which Indian observatory is in Hanle, Ladakh?
(a) Mount Abu Observatory
(b) Indian Astronomical Observatory
(c) Kodaikanal Observatory
(d) Delhi Planetarium
📝 Answer: (b) Indian Astronomical Observatory - Asteroids are found between:
(a) Earth and Mars
(b) Mars and Jupiter
(c) Saturn and Uranus
(d) Neptune and Pluto
📝 Answer: (b) Mars and Jupiter - Which of these is a dwarf planet?
(a) Neptune
(b) Pluto
(c) Venus
(d) Mercury
📝 Answer: (b) Pluto - Light pollution is caused by:
(a) Excess sunlight
(b) Artificial lights
(c) Stars
(d) Moonlight
📝 Answer: (b) Artificial lights - The Moon completes one revolution around the Earth in:
(a) 30 days
(b) 24 hours
(c) 27 days
(d) 7 days
📝 Answer: (c) 27 days - Which of these tools is used to see distant objects in the sky?
(a) Microscope
(b) Binoculars
(c) Telescope
(d) Magnifying glass
📝 Answer: (c) Telescope - Our solar system is part of which galaxy?
(a) Andromeda
(b) Orion
(c) Milky Way
(d) Canis Major
📝 Answer: (c) Milky Way
One-Mark Questions
- What is a constellation?
📝 A group of stars that forms a recognizable pattern. - Name the star that appears fixed in the sky.
📝 The Pole Star (Polaris). - What is the Red Planet?
📝 Mars. - Which planet is called the Evening Star?
📝 Venus. - Name the brightest star in the night sky.
📝 Sirius. - What is light pollution?
📝 Excessive artificial light that makes stars hard to see. - Name one sky observation mobile app.
📝 Sky Map. - What is the Moon to Earth?
📝 Its natural satellite. - How many planets are in our solar system?
📝 Eight. - Which planet has a reddish appearance?
📝 Mars. - Which planet has a dense atmosphere and is very hot?
📝 Venus. - What is the name of India’s third moon mission?
📝 Chandrayaan-3. - Which object in the solar system has a tail when near the Sun?
📝 Comet. - What is the Milky Way?
📝 The galaxy that contains our solar system. - What is the name of the Indian dark sky reserve?
📝 Hanle Dark Sky Reserve.
Two-Mark Questions
- Why do we not see stars during the day?
📝 The brightness of the Sun scatters in the atmosphere, making it impossible to see dim stars during the daytime. - Differentiate between stars and planets.
📝 Stars produce their own light; planets reflect light from the Sun. - What is a natural satellite? Give one example.
📝 A celestial body that revolves around a planet, like the Moon around Earth. - How is Venus different from other planets in terms of brightness?
📝 Venus appears very bright and is visible at dawn or dusk, earning it the name Morning/Evening Star. - What are comets made of?
📝 Comets are made of dust, ice, gases, and rocky materials. - Why is the Sun important for life on Earth?
📝 It provides heat and light, essential for life, weather, and plant growth. - Describe the Orion constellation.
📝 It is shaped like a hunter and has three bright stars in the center known as Orion’s Belt. - What are asteroids? Where are they found?
📝 Rocky celestial bodies mostly found in the asteroid belt between Mars and Jupiter. - What is a galaxy?
📝 A galaxy is a huge system of stars, gas, and dust bound together by gravity. - What is the distance between the Earth and the Sun? What is its unit?
📝 About 150 million kilometers, called 1 Astronomical Unit (AU).
Higher Order Thinking Skills (HOTS)
- Why does the Moon have craters that last for millions of years, unlike the Earth?
📝 The Moon has no atmosphere, water, or weather to erode its surface. So craters caused by impacts remain unchanged for long periods. - If there were no Sun, what would happen to the Solar System?
📝 All planets would lose their source of heat and light and could drift into space without the Sun’s gravitational pull. - Why do stars appear to move but the Pole Star remains fixed?
📝 Stars appear to move due to Earth’s rotation, but the Pole Star lies almost directly above the Earth’s axis, so it appears fixed. - How does light pollution affect wildlife?
📝 It disturbs nocturnal animals’ behaviors, migration, mating, and sleep cycles, affecting ecosystems. - Can a planet become a star? Why or why not?
📝 No, planets lack the mass required to start nuclear fusion, which is essential for a star to shine.
