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📚 Class VI Science 📘 NCERT Solutions Ch 12 - Beyond Earth

Class VI NCERT solutions Beyond Earth

Class VI Science • Curiosity

🚀 Chapter 12: Beyond Earth

NCERT Solutions — Complete Question & Answer Guide

UNIQUE STUDY POINT BY SUMEET SAHU | uniquestudyonline.com

📌 Key Concepts

✦ Solar system: Sun + 8 planets + moons + asteroids + comets

✦ Planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

✦ Stars emit own light; Planets reflect sunlight

✦ Constellations: star patterns (Ursa Major/Saptarishi, Orion)

✦ Moon: Earth\'s natural satellite, ~27.3 days per revolution

✦ Pole Star (Dhruv Tara): appears stationary, indicates North

✦ Asteroids: rocky bodies between Mars & Jupiter

✦ Comets: icy bodies with glowing tail near Sun

✦ Milky Way: our galaxy with billions of stars

📝 Let Us Enhance Our Learning

Q1 What is the solar system?
ANSWER

The Sun at the centre + all celestial bodies revolving around it: 8 planets, moons, asteroids, comets. The Sun\'s gravity holds everything together.

Q2 Name all 8 planets in order.
ANSWER
#PlanetKey Fact
1MercurySmallest; closest to Sun
2VenusHottest; Earth\'s twin in size
3EarthOnly planet with life
4MarsRed planet; 2 moons
5JupiterLargest planet
6SaturnFamous rings
7UranusRotates on its side
8NeptuneFarthest; very cold

Memory Trick

My Very Educated Mother Just Showed Us Neptune

Q3 Difference between star and planet.
ANSWER
FeatureStarPlanet
LightEmits own lightReflects light
TwinklingStars twinklePlanets don\'t twinkle
SizeVery largeMuch smaller
CompositionHot gasesRocks, gases, or ice
ExampleSun, SiriusEarth, Mars
Q4 What are constellations?
ANSWER

Constellation

A group of stars forming a recognizable pattern in the night sky.

  • Ursa Major (Saptarishi) — 7 stars, looks like a ladle
  • Orion (Hunter) — 3 stars in a line (belt), visible in winter
Q5 What is the Pole Star? Why special?
ANSWER

Pole Star (Dhruv Tara) is located above Earth\'s North Pole.

  • Appears stationary while other stars seem to move
  • Always indicates North direction
  • Used for navigation by ancient travellers & sailors

Located using the pointer stars of Ursa Major.

Q6 Describe the Moon.
ANSWER
  • Earth\'s only natural satellite
  • Does not have own light — reflects sunlight
  • Revolves around Earth in ~27.3 days
  • No atmosphere, no water, no life
  • Surface: craters, mountains, plains
  • Shows phases: New Moon → Crescent → Half → Full Moon (~29.5 days cycle)
Q7 Difference between asteroids and comets.
ANSWER
FeatureAsteroidsComets
Made ofRocky bodiesIcy (frozen gases, rock, dust)
LocationBetween Mars & JupiterFar edges of solar system
TailNo tailGlowing tail near Sun
ExampleCeresHalley\'s Comet (~76 years)
Q8 What is the Milky Way?
ANSWER

The Milky Way (Akash Ganga) is our galaxy — a spiral-shaped collection of billions of stars, gas, and dust. On clear dark nights, it appears as a faint milky band across the sky. Our Sun is just one of its billions of stars.

Q9 Why do stars appear to move east to west?
ANSWER

Stars appear to move because Earth rotates on its axis from west to east. This makes stars seem to move in the opposite direction — just like trees seem to move backward when you\'re in a moving bus. The stars aren\'t actually moving.

Q10 Why is Earth unique?
ANSWER
  • Only planet known to support life
  • Has liquid water on surface
  • Suitable atmosphere with oxygen
  • Moderate temperature
  • Protective ozone layer

UNIQUE STUDY POINT BY SUMEET SAHU

Amitesh Nagar, Indore, Madhya Pradesh | uniquestudyonline.com

📖 Unique Study Point by Sumeet Sahu | Free Study Materials for Class VI-X

📍 Amitesh Nagar, Indore, MP | uniquestudyonline.com