CBSE Class 6 Science Chapter 12: Beyond Earth — Assertion & Reason
CBSE Class 6 Science Assertion & Reason
Expert crafted · Instant PDF download · 2026-27
The following Assertion and Reason questions are based on Chapter 12: Beyond Earth from the NCERT Class 6 Science textbook Curiosity. Each question has four options — read both the Assertion (A) and Reason (R) carefully before selecting your answer.
How to attempt Assertion & Reason questions:
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is NOT the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Assertion & Reason Questions
1
Assertion (A): Recognising stars and their patterns was a useful skill for sailors in ancient times.
Reason (R): Before the invention of the magnetic compass, these imaginary shapes helped travellers find directions.
Reason (R): Before the invention of the magnetic compass, these imaginary shapes helped travellers find directions.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Constellations provided a reliable natural map in the night sky that sailors used to navigate across the seas.
2
Assertion (A): The Pole Star is highly useful for locating the North direction in the Northern hemisphere.
Reason (R): The Pole Star appears stationary in the North direction of the night sky.
Reason (R): The Pole Star appears stationary in the North direction of the night sky.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Because its position remains fixed in the North, it serves as a reliable directional guide.
3
Assertion (A): The Pole Star can be clearly seen from everywhere on Earth.
Reason (R): The Pole Star is not visible from the southern hemisphere of the Earth.
Reason (R): The Pole Star is not visible from the southern hemisphere of the Earth.
Answer: (d)
A is false, but R is true. The Pole Star is only visible in the Northern hemisphere; it cannot be seen from the Southern hemisphere.
4
Assertion (A): The star Sirius can be located by imagining a straight line passing through the three middle stars of Orion.
Reason (R): Sirius is the brightest star in the night sky and is located close to the constellation Orion.
Reason (R): Sirius is the brightest star in the night sky and is located close to the constellation Orion.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The three belt stars of Orion point almost directly to Sirius, making it a reliable way to find this exceptionally bright star.
5
Assertion (A): Fewer stars are visible in the night sky from a big city compared to a village.
Reason (R): The presence of excessive artificial light at night time in cities causes light pollution, hiding the stars.
Reason (R): The presence of excessive artificial light at night time in cities causes light pollution, hiding the stars.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Light pollution, along with smoke and dust in cities, obscures the faint light of distant stars, making them hard to see.
6
Assertion (A): The Sun appears much bigger than other stars in the sky.
Reason (R): The Sun is the largest star in the entire universe.
Reason (R): The Sun is the largest star in the entire universe.
Answer: (c)
A is true, but R is false. The Sun appears large only because it is much closer to Earth than other stars. Many other stars in the universe are significantly larger than our Sun.
7
Assertion (A): We can easily distinguish planets from stars because planets appear to twinkle a lot.
Reason (R): Stars shine with their own light, but planets do not twinkle and only reflect sunlight.
Reason (R): Stars shine with their own light, but planets do not twinkle and only reflect sunlight.
Answer: (d)
A is false, but R is true. Stars twinkle, whereas planets generally shine with a steady light. The assertion states the exact opposite.
8
Assertion (A): Venus is commonly called the Morning Star or the Evening Star.
Reason (R): Venus is the nearest star to the Earth after the Sun.
Reason (R): Venus is the nearest star to the Earth after the Sun.
Answer: (c)
A is true, but R is false. Venus is called the Morning/Evening star because of its brightness at dawn and dusk, but it is a planet, not a star. The nearest star after the Sun is Proxima Centauri.
9
Assertion (A): Venus is hotter than Mercury even though Mercury is closer to the Sun.
Reason (R): The presence of an atmosphere on Venus traps heat, significantly increasing its temperature.
Reason (R): The presence of an atmosphere on Venus traps heat, significantly increasing its temperature.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Venus's thick atmosphere creates a strong greenhouse effect, trapping solar energy and making it the hottest planet.
10
Assertion (A): Mars is often referred to as the Red Planet.
Reason (R): The soil on the surface of Mars is reddish in colour.
Reason (R): The soil on the surface of Mars is reddish in colour.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The iron-rich, reddish soil gives the planet its distinct red appearance in the night sky.
11
Assertion (A): Jupiter, Saturn, Uranus, and Neptune have solid rocky surfaces just like the Earth.
Reason (R): These four outermost planets are giant planets mostly made of gases.
Reason (R): These four outermost planets are giant planets mostly made of gases.
Answer: (d)
A is false, but R is true. The inner four planets are rocky, while the outer four are giant gaseous planets without solid rocky surfaces.
12
Assertion (A): Pluto is now classified as a dwarf planet instead of a regular planet.
Reason (R): In 2006, the International Astronomical Union (IAU) redefined the requirements for an object to be called a planet.
Reason (R): In 2006, the International Astronomical Union (IAU) redefined the requirements for an object to be called a planet.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Pluto was reclassified because it did not meet the updated criteria set by the IAU for full-fledged planets.
13
Assertion (A): The bowl-like craters on the Moon's surface stay there for a very long time without disappearing.
Reason (R): There is no atmosphere or water on the Moon to wear away or alter these craters.
Reason (R): There is no atmosphere or water on the Moon to wear away or alter these craters.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Because the Moon lacks wind, rain, and active geology, the impact craters remain undisturbed for millions of years.
14
Assertion (A): August 23 is celebrated as 'National Space Day' in India.
Reason (R): On this day in 2023, the Chandrayaan-3 lander successfully soft-landed near the Moon's south pole.
Reason (R): On this day in 2023, the Chandrayaan-3 lander successfully soft-landed near the Moon's south pole.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The Government of India designated this day to commemorate this historic achievement in space exploration.
15
Assertion (A): Most asteroids are found revolving around the Sun in a belt between the orbits of Earth and Mars.
Reason (R): Asteroids are small, rocky objects with irregular shapes.
Reason (R): Asteroids are small, rocky objects with irregular shapes.
Answer: (d)
A is false, but R is true. The asteroid belt is located between the orbits of Mars and Jupiter, not Earth and Mars.
16
Assertion (A): A comet develops a long, glowing tail as it approaches the Sun.
Reason (R): The heat from the Sun causes the frozen material in the comet to evaporate, forming the tail.
Reason (R): The heat from the Sun causes the frozen material in the comet to evaporate, forming the tail.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The solar heat vaporizes the comet's ice and dust, which streams outwards to create its characteristic tail.
17
Assertion (A): Our Solar System is a part of the Milky Way Galaxy.
Reason (R): A galaxy consists of millions to billions of stars.
Reason (R): A galaxy consists of millions to billions of stars.
Answer: (b)
Both A and R are true, but R is NOT the correct explanation of A. Both statements are correct facts, but the definition of a galaxy does not explain why our Solar System specifically belongs to the Milky Way.
18
Assertion (A): The search for life beyond our Solar System is mostly directed towards exoplanets.
Reason (R): Exoplanets are planets that revolve around other stars in our galaxy.
Reason (R): Exoplanets are planets that revolve around other stars in our galaxy.
Answer: (b)
Both A and R are true, but R is NOT the correct explanation of A. While R defines what exoplanets are, it does not explain the biological or environmental reasons scientists search them for life.
19
Assertion (A): The Earth can be considered a satellite of the Sun.
Reason (R): In general, any object that moves around a much larger object can be called a satellite.
Reason (R): In general, any object that moves around a much larger object can be called a satellite.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Because the Earth orbits the much larger Sun, it fits the broad definition of a satellite.
20
Assertion (A): The Earth takes nearly one year to complete one full rotation on its axis.
Reason (R): The movement of an object around the Sun is called revolution.
Reason (R): The movement of an object around the Sun is called revolution.
Answer: (d)
A is false, but R is true. The Earth takes about 24 hours to complete one rotation on its axis. It takes one year to complete one revolution around the Sun.
❓ Frequently Asked Questions
What is covered in CBSE Class 6 Science Chapter 12 Beyond Earth?
This chapter covers all key topics from Beyond Earth as per CBSE 2026-27 syllabus.
Is this Assertion & Reason useful for CBSE board exams?
Yes, designed for CBSE Class 6 board exam preparation covering the complete syllabus.
Are these CBSE Class 6 Science Assertion & Reason updated for 2026-27?
Yes, all content at eBookPublisher is updated as per the latest 2026-27 CBSE syllabus.
How many chapters are in CBSE Class 6 Science?
All chapters of CBSE Class 6 Science are covered at eBookPublisher with free Assertion & Reason for each chapter.
Can I study Beyond Earth online for free?
Yes, complete Assertion & Reason for Beyond Earth is available free at eBookPublisher. Study online directly — no download needed.
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