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NCERT Solutions for Class 6 Geography - The Earth in the Solar System

Q1. Answer the following questions briefly.
(a) How does a planet differ from a star?
Ans: A planet is different from a star in these ways:

  • Planets do not emit their own light, while stars generate light through nuclear reactions.
  • Planets shine by reflecting the light of a nearby star, such as the Sun.
  • Stars are generally much larger and hotter compared to planets.

Detailed difference between Stars and PlantesDetailed difference between Stars and Plantes

(b) What is meant by the ‘Solar System’?
Ans: The term Solar System refers to the collective system centered around the Sun. It comprises the Sun, eight planets, their natural satellites, and other celestial bodies such as asteroids, comets, and meteoroids, all orbiting the Sun.

Solar SystemSolar System

(c) Name all the planets according to their distance from the sun.
Ans: The planets, listed in order of their distance from the Sun, are:

  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Uranus
  • Neptune.

(d) Why is the Earth called a unique planet?
Ans: 

  • Earth is considered a unique planet because it is the only known celestial body that supports life. 
  • It has favorable conditions for life, including a moderate temperature range, the presence of water, and an atmosphere containing essential gases like oxygen.

(e) Why do we see only one side of the moon always?
Ans: 

  • The Moon takes approximately 27 days to orbit the Earth and requires the same time to complete one rotation. 
  • Due to this synchronous rotation, the same side of the Moon always faces Earth.

(f) What is the Universe?
Ans: 

  • The Universe encompasses all of existence, including billions of galaxies, each containing vast numbers of stars, dust, and gases. 
  • These galaxies collectively make up the expanse of the Universe.

UniverseUniverseQ2. Tick the correct answer.
(a) The planet known as the “Earth’s Twin” is
(i) Jupiter
(ii) Saturn
(iii) Venus
Ans: (iii) Venus

NCERT Solutions for Class 6 Geography - The Earth in the Solar System  View Answer

This is because Venus has a similar size, mass, and composition to Earth, although it has a very different atmosphere and surface conditions.

Earth and its Twin VenusEarth and its Twin Venus

(b) Which is the third nearest planet to the sun?
(i) Venus
(ii) Earth
(iii) Mercury
Ans: (ii) Earth

NCERT Solutions for Class 6 Geography - The Earth in the Solar System  View Answer

Earth is the third nearest planet to the Sun, following Mercury and Venus in the order of planets in our solar system.

(c) All the planets move around the sun in a
(i) Circular path
(ii) Rectangular path
(iii) Elongated path
Ans: (iii) Elongated path

NCERT Solutions for Class 6 Geography - The Earth in the Solar System  View Answer

All the planets move around the sun in an elongated path, meaning it is slightly stretched out, though it is nearly circular for most planets.

(d) The Pole Star indicates the direction to the
(i) South
(ii) North
(iii) East
Ans: (ii) North

NCERT Solutions for Class 6 Geography - The Earth in the Solar System  View Answer

The Pole Star, also known as the North Star, is almost directly above the North Pole, making it a reliable guide for finding north.

Pole StarPole Star

(e) Asteroids are found between the orbits of
(i) Saturn and Jupiter
(ii) Mars and Jupiter
(iii) The Earth and Mars
Ans: (ii) Mars and Jupiter

NCERT Solutions for Class 6 Geography - The Earth in the Solar System  View Answer

Asteroids are primarily found in the Asteroid Belt, a region located between the orbits of Mars and Jupiter. This belt contains numerous rocky bodies that orbit the Sun, ranging in size from small rocks to large asteroids.

AsteroidsAsteroids

Q3. Fill in the blanks.
(a) A group of ______ forming various patterns is called a ______.
Ans: Stars, constellation

NCERT Solutions for Class 6 Geography - The Earth in the Solar System  View Answer

A constellation is a collection of stars that appear to form a recognizable shape or pattern when viewed from Earth. These patterns often represent mythological figures, animals, or objects and are used by astronomers for identifying specific regions in the night sky.

(b) A huge system of stars is called______.
Ans: Galaxy

NCERT Solutions for Class 6 Geography - The Earth in the Solar System  View Answer

A galaxy is an enormous system composed of stars, gas, dust, and dark matter, all bound together by gravity. Our galaxy, the Milky Way, contains billions of stars, including our Sun.

GalaxyGalaxy

(c) ______ is the closest celestial body to our earth.
Ans: The Moon

NCERT Solutions for Class 6 Geography - The Earth in the Solar System  View Answer

The Moon is Earth’s only natural satellite and the nearest celestial object to us in space. Its proximity to Earth makes it a prominent feature in our night sky and has significant effects, such as tides.

(d) ______ is the third nearest planet to the Sun.
Ans: Earth

NCERT Solutions for Class 6 Geography - The Earth in the Solar System  View Answer

In our solar system, the planets are arranged in order of distance from the Sun. Earth is the third planet from the Sun, following Mercury and Venus.

(e) Planets do not have their own ______ and ______.
Ans: Heat, Light

NCERT Solutions for Class 6 Geography - The Earth in the Solar System  View Answer

Planets are not sources of light or heat; instead, they reflect the light of nearby stars, like our Sun. They are visible because they reflect sunlight and do not generate energy like stars do.

The document NCERT Solutions for Class 6 Geography - The Earth in the Solar System is a part of the Class 6 Course Social Studies (SST) Class 6.
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FAQs on NCERT Solutions for Class 6 Geography - The Earth in the Solar System

1. What is the solar system and what does it consist of?
Ans.The solar system is a collection of celestial bodies that are bound by gravity to the Sun. It consists of the Sun, eight planets, their moons, dwarf planets, asteroids, comets, and meteoroids.
2. How do planets differ from stars in the solar system?
Ans.Planets do not produce their own light; they reflect the light of the Sun. In contrast, stars, including the Sun, generate their own light and heat through nuclear fusion.
3. What are the names of the eight planets in our solar system?
Ans.The eight planets in our solar system, in order from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
4. What is the significance of the Earth in the solar system?
Ans.Earth is significant because it is the only known planet that supports life. It has the right conditions, such as water, an atmosphere, and suitable temperatures, that allow living organisms to thrive.
5. What is the difference between a comet and an asteroid?
Ans.Comets are icy bodies that release gas or dust, forming a visible atmosphere or tail when they come close to the Sun. Asteroids, on the other hand, are rocky or metallic objects that do not have tails and are primarily found in the asteroid belt between Mars and Jupiter.
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