[NCERT] Class 6 Geography Chapter 1 The Earth in the Solar System | Notes | Solution

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Here you will get notes, solutions, extra questions of NCERT Class 6 Geography Chapter 1 – The Earth in the Solar System.

[Notes] Class 6 Geography Chapter 1 The Earth in the Solar System

  • Celestial Bodies: the sun, the moon plus all those objects shining in the night sky are called celestial bodies.
  • Stars: They have their own heat. They radiate a large amount of light ex. the Sun.
  • Constellations: Basically, these are patterns formed imaginary outlines by the group of stars ex. Ursa Major, Saptarshi.
  • Pole Star: There is one star which always remains in the same position wrt the earth. Our ancestors used this star to navigate the route. They knew that this star indicates north direction. Hence it is called North Star or Pole Star.
  • Planets: Planets are celestial bodies. They do not have their own heat or light. They are lit by the star ex. the earth.
  • Rings: Belt of small debris. You can see them with the help of a powerful telescope.
  • The Solar System = The Sun (head of the family) + Eight Planets + Satellites + Other Celestial Bodies in the vicinity.
  • The Sun: Ultimate source of energy for our family i.e. the solar system. He is made up of gases and these gases are hot. The sun is the centre of the solar system.
  • Planets of the Solar System: Eight of them. Can you name them in a comment below?

Hint: My Very Efficient Mother Just Served Us Nuts

  • Orbits: Planets move around the sun in a fixed path. These paths are elongated and called orbits.
  • Geoid: Earth-like shape (flattened at poles and bulged at the equator)
  • Moon: The moon is an only natural satellite of the earth. The moon moves around the earth in about 27 days
  • Asteroids: small rocky bodies orbiting the sun. Large numbers of these, ranging enormously in size, are found between the orbits of Mars and Jupiter.
  • Meteoroids: a small body moving in the solar system that would become a meteor if it entered the earth’s atmosphere.
  • Meteorite: Large piece of rock or metal from space that has landed on Earth
  • Galaxy: A galaxy is a huge system of billions of stars, and clouds of dust and gases. There are millions of such galaxies that make the Universe.
  • Full Moon: Poornima.
  • New Moon: Amavasya

Some Fun Facts That You Should Know

  • Word PLANET comes from the word Plantetai which means the wanderer.
  • Jupiter, Saturn, Uranus and Neptune have rings around them.
  • Pluto is a dwarf planet, though, till August 2006, Pluto was considered a planet
  • Only earth supports life because it has water and air, the temperature is neither too hot nor too cold and optimum to sustain life.
  • Only one side of the moon is visible to us on the earth. Why? Watch Video explained over there
  • Neil Armstrong was the first man to step on the surface of the moon on 21 July 1969.
  • Light travels at the speed 300000 km per second and it takes 8 minutes for the light to reach to the earth from the sun.
  • The universe is too big it is beyond our imagination.

Why Earth is Called Blue Planet?

Earth surface is 71% ocean, oceans are water and water is blue. From the outer space, the earth appears blue that is why it is called the blue planet.

Why the moon changes its shape and size?

Moon doesn’t change its shape but the very bright light of the sun does not allow us to see everything that is out there. That is the same reason why we see the other stars and planets in the night sky and not in daylight.

EXERCISE

How Does Planet Differ From Star?

  • Planets do not have their own heat or light. They are lit by the star ex. the earth.
  • On the other hand, stars are a source of energy. Stars have a large amount of heat and they radiate light.

What Is Meant By Solar System?

  • The solar system is family and the sun is the head of that family.
  • The solar system consists of the sun, eight planets, satellites and Other Celestial Bodies in the vicinity.

Name All the Planets According to their distance from the sun.

  • MVEMJSUN

Why is the earth called a unique planet?

Only earth supports life because it has water and air, the temperature is neither too hot nor too cold and optimum to sustain life.

Why Do We See Only One Side of the Moon Always?

Technically it is because of a situation known as synchronous rotation, or tidal locking.

As of now just remember that Moon takes exactly 27 days to complete one spin around the earth as wee as for one rotation around itself.

Watch video- here I have explained better – Click Me

Practice MCQs – The Earth in The Solar System

Q1. The planet is known as the “Earth’s Twin” is –

    1. Jupiter
    2. Venus
    3. Mars
    4. Mercury

Q2. Which is the third nearest planet to the sun?

    1. Venus
    2. Earth
    3. Mercury
    4. Mars

Q3. All the planets move around the sun in a –

    1. Circular path
    2. Rectangular path
    3. Elongated path
    4. None of the above

Q4. The Pole Star indicates the direction to the –

    1. South
    2. North
    3. East
    4. None of the Above

Q5. Consider the following statements

1.    A ray of light from the sun takes about 8 seconds to reach the earth
2.    Light from the moon takes only a second to reach the earth

Select the correct answer from the following codes

  1. Only 1
  2. Only 2
  3. Both 1 and 2
  4. Neither 1 nor 2

Q6. Consider the following statements:

  1. The sun is about 150 million km away from earth.
  2. The light of the sun takes about eight seconds to reach the earth.

Which of the statement(s) given above is/are correct?

  1. Only 1
  2. Only 2
  3. Both 1 and 2
  4. Neither 1 or 2

Answer the questions in the comment section below and get reviewed by others.

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45 COMMENTS

  1. QI=OP.2 VENUS
    Q2=OP.2 EARTH
    Q3=OP.3 ELONGATED PATH
    Q4=OP.2 NORTH
    Q5=OP.3 BOTH 1AND 2. BECAUSE MOONLIGHT TAKE ONLY 1.3 SEC TO REACH EARTH SURFACE
    Q6=OP.3 BOTH 1AND 2

  2. Answer 1 : Venus
    Answer 2 : Earth
    Answer 3 : None of the above (Elliptical orbit)
    Answer 4 : North
    Answer 5 : Nome of the above (8.2 minutes)
    Answer 6 : 1 only

    Thank you India’s shastra team 🙂

  3. 1. Venus
    2. Earth
    3. Elongated path
    4. North
    5. Only 2 (Light from the moon takes only a second to reach the earth), Sun-8 Minutes
    6. Only 1 (The sun is about 150 million km away from earth)

  4. Thank you very much sir… Please continue, and don’t stop, please make video about daily Hindu news paper for gs day by day, it will help us lot and after 10 day u can left the current affair videos, this will help to how to read news paper day by day, after 10 days we can able grab the news paper… Please try this one also if you’re free….

  5. our comment is awaiting moderation
    Thank you very much sir… Please continue, and don’t stop, please make video about daily Hindu news paper for gs day by day, it will help us lot and after 10 day u can left the current affair videos, this will help to how to read news paper day by day, after 10 days we can able grab the news paper… Please try this one also if you’re free….

  6. ” My very efficient mother just serves us nuts ” – mercury Venus earth mars Jupiter Saturn Uranus Neptune
    Please help me out in Last 2 questions guys!!

  7. Ans1) – 2
    Ans2) – 2
    Ans3) – 1
    Ans4) – 4
    Ans5) – 4
    Ans6) – 1
    Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. ( MV EMJ SUN )

  8. Q1. 2
    Q2. 2
    Q3. 3
    Q4. 2
    Q5. 4
    Q6. 1

    That’s a great quiz. It holds the undercurrents that run through the given NCERT chapter, that sometimes I tend to ignore.

    Thanks.

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