Short Summary in 5 Minutes of Chapter-The Earth in the Solar System | CBSE NCERT Class 6 Geography Textbook notes for UPSC IAS (chapter 1)
Ncert Class 6 Geography Chapter 1 notes: Well if you want to cover up remaining ncert books quickly (less than 5 minutes per chapter) before the upsc prelims or want to quickly revise your syllabus in case you have not prepared notes then you are at the right place. |
| Ncert Class 6 Geography Chapter 1-The Earth in the Solar System Notes |
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Ncert geo class 6 textbook chapter 1 -The Earth in the Solar System
(quick revision notes in english)
While looking at sky in the night we see many tiny shining
objects-of which some are bright, others are dim. They seem to be twinkling.
Again, if you have
noticed the pattern of the shape of the moon then you would have seen that once
in a month, we see full moon and night of a fortnight later, you cannot see it
at all. It is a new moon night or ‘Amavasya’.
What are celestial bodies?
The sun, moon, stars and planets and all
those objects shining in the night are called celestial bodies. Some celestial
bodies are very big and hot.
What are celestial bodies made up of?
They are made of
gas, have their own heat and light which they emit in large amounts. These
celestial bodies are called stars. The sun is an example of a star.
What are constellations?
While watching the
night sky, we notice various patterns formed by different groups of stars.
These are called
constellations. Some examples are Ursa Major, Orion, Scorpius,etc.
How constellations were helpful to earlier people?
In ancient times,
people used to determine directions during the night with the help of stars.
NOTE: The North
star indicates the north direction. It is also called pole star. So, it can be
used to find the direction in case we don’t have the compass.
On the other hand,
it is also true that some celestial bodies do not have their own heat and
light. They use the light of the stars for their source of light. Such bodies
are called planets.
What are asteroids and meteoroids?
The sun, eight
planets, satellites and some other celestial bodies known as asteroids and
meteoroids form the solar system.
Let’s see about some celestial bodies in brief before be go
to the next chapter.
The Sun:
i) It is at the center of solar system.
ii) It is huge and made up of extremely hot gases.
iii) The sun is the ultimate source of heat and light for
the solar system.
Planets:
i) The word ‘planet’ comes from the Greek word ‘Planetai’
which means wanderers.
ii) There are eight planets in our solar system-Mercury,
Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
iii) All the eight planets of the solar system move around
the sun in fixed paths. These paths are elongated. They are called orbits.
iv) Till August 2006, Pluto was also a planet. But now it is
called only a celestial body. It is now considered as a “Dwarf planet”.
The Earth:
i) The earth is the third nearest planet to the sun and is
our home.
ii) It is slightly flattered at the poles. That is why, its
shape is called Geoid.
iii) Conditions favourable to support life are probably
found only on the earth.
iv) From the outer space, the earth appears blue because its
2/3rd surface is covered by water. It is, therefore, called a blue planet.
The Moon:
i) Our earth has only one natural satellite that is the
moon.
ii) It appears so big because it is nearer to our planet
than other celestial bodies.
iii) The moon moves around the Earth in about 27 days and 8
hours.
iv) The moon does not have conditions favourable for
life.
What are the Asteroids?
(i) There are numerous tiny bodies which also move around
the sun. These bodies are called asteroids.
(ii) They are found between the orbits of Mars and
Jupiter.
What are the Meteoroids?
i) The small pieces of rocks which move around the sun are
called meteoroids.
ii) A galaxy is a huge system of billions of stars, and clouds of dust and gases. These are millions of such galaxies that make the universe.
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