Class 6 Social Science - Geography
Chapter: 1 - The Earth in the Solar System
#NCERT Short Notes - #Mind Maps
Try the following quizzes and test your knowledge on this chapter
MCQs On Class 6 Social Science - Geography - Chapter: 1 - The Earth in the Solar System - Set - 1 Click Here
MCQs On Class 6 Social Science - Geography - Chapter: 1 - The Earth in the Solar System - Set - 2 Click Here
MCQs On Class 6 Social Science - Geography - Chapter: 1 - The Earth in the Solar System - Set - 3 Click Here
MCQs On Class 6 Social Science - Geography - Chapter: 1 - The Earth in the Solar System - Set - 4 Click Here
About Celestial Bodies:
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Celestial Bodies
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Objects shining in the night sky
- Sun
- Moon
- Planets
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Who study celestial bodies
- Astronomers
- Aryabhatta was a famous astronomer
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Some are very big and hot
- They are Made up of gases
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Some have their own heat and light
- They are called stars
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Some of do not have own heat and light
- Such are Planets
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About Constellations:
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Constellations
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Various patterns formed by groups of stars
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Example - Ursa Major or Big Bear
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Saptarishi
- Easily recognizable
- Group of seven stars
- Part of Ursa Major
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About Pole Star:
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Pole Star
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North star
- Indicates north direction
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We can locate with help of Saptarishi
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About the Sun:
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The Sun
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Centre of solar system
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150 million km away from Earth
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Made up of extremely hot gases
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Ultimate source of heat and light
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Provides the pulling force that binds the solar system
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About the Planets:
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Planets
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There are 8 planets
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These revolve around the Sun in fixed paths called "orbits"
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Terrestrial Planets
- Also known as Inner planets
- These are very close to the sun
- These are made up of rocks
- Those are
- Mercury
- Venus
- Earth
- Mars
-
Jovian Planets
- Also known as Outer Planets
- These very-very far from the sun
- These are huge planets
- These are made up of gases and liquids
- Those are
- Jupiter
- Saturn
- Uranus
- Neptune
-
Mercury
- Nearest to the sun
- It takes 88 days to complete one round around the Sun
-
Venus
- Also known as a Earth's twin
-
Planets with rings
- rings are belts of small debris
- Jupiter
- Saturn
- Uranus
- Neptune
-
Dwarf planets
- These are declared by International Astronomical Union [IAU]
- Examples
- Pluto [Till 2006 it is also a Planet]
- Ceres
- UB313
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About the Earth:
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The Earth
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It is third nearest planet to the sun
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In size, it is fifth largest planet
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It has water and air
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Its two-thirds surface is covered by water
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Slightly flattened at the poles
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Shape - Geoid
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It appears blue
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Light travels at the speed of about 300,000 km per second
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Light of the sun takes about 8 minutes to reach the earth
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About the Moon:
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The Moon
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Earth has only one satellite
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Its diameter is one-quarter that of the Earth
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It is about 3,84,400 km away from us
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It moves around the earth in about 27 days
-
It takes exactly the same time [27 days] to complete one spin
-
Because of above reason, one side of the moon is visible to us
-
It has mountains, plains, and depressions
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About Asteroids:
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Asteroids
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These are numerous tiny bodies
-
These are move around the sun
-
These are found between the orbits of Mars and Jupiter
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These are parts of a planet that exploded many years back
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About Meteoroids:
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Meteoroids
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Small pieces of rocks move around the sun
-
Sometimes these come near the earth and tend to drop upon it
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Due to friction with air, they get heated up and burn
- It causes a flash of light
- Sometimes incomplete burnt falls on the earth and create a hollow
-
About Galaxy:
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Galaxy
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Made up of billions of stars and clouds of dust and gases
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Millions of such galaxies make up the Universe
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About Milky Way Galaxy:
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Milky Way Galaxy
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It is a cluster of millions of stars
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Our solar system is a part of this galaxy
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This was imagined to be a river of light flowing in the sky
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Thus, it was named Akash Ganga
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About Human-made Satellites:
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Human-made Satellites
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It is an artificial body
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It is designed by scientists
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These are for designed for information about the universe
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It is carried by rocket and placed in orbit around the earth
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Some Indian satellites in space are INSAT, IRS, EDUSAT, etc
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Important Points:
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Important Points
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MERCURY PLANET
- To complete one round around the Sun - 88 days
- To complete one spin on axis - 59 days
-
VENUS
- To complete one round around the Sun - 255 days
- To complete one spin on axis - 243 days
-
EARTH
- To complete one round around the Sun - 365 days
- To complete one spin on axis - 1 day
- Number of moons - 1
-
MARS
- To complete one round around the Sun - 687 days
- To complete one spin on axis - 1 day
- Number of moons - 02
-
JUPITER
- To complete one round around the Sun - 11 years, 11 months [about 12 years]
- To complete one spin on axis - 9 hours, 56 minutes
- Number of moons - about 53
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SATURN
- To complete one round around the Sun - 29 years, 5 months
- To complete one spin on axis - 10 hours 40 minutes
- Number of moons - about 53
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URANUS
- To complete one round around the Sun - 84 years
- To complete one spin on axis - 17 hours 14 minutes
- Number of moons - about 27
-
NEPTUNE
- To complete one round around the Sun - 164 years
- To complete one spin on axis - 16 hours 7 minutes
- Number of moons - about 13
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Try the following quizzes and test your knowledge on this chapter
MCQs On Class 6 Social Science - Geography - Chapter: 1 - The Earth in the Solar System - Set - 1 Click Here
MCQs On Class 6 Social Science - Geography - Chapter: 1 - The Earth in the Solar System - Set - 2 Click Here
MCQs On Class 6 Social Science - Geography - Chapter: 1 - The Earth in the Solar System - Set - 3 Click Here
MCQs On Class 6 Social Science - Geography - Chapter: 1 - The Earth in the Solar System - Set - 4 Click Here
Source/Reference: NCERT Textbook Class 6 Social Science - Geography
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ShortNotes - Mind Maps [English Medium]: NCERT Textbook Class 6 Social Science - Geography
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ShortNotes - Mind Maps [Telugu Medium]: NCERT Textbook Class 6 Social Science - Geography
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