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"THE ENCAPSULATION"- PART 1 GEOGRAPHY NCERT (CLASS 6) BY ASHISH MALIK
unacademy ABOUT ME: Ashish Malik (B.E. Civil) Appeared for UPSC CSE Mains twice (2016,2017) Freelancer and Faculty of GS Follow me on UNACADEMY at: https://unacademy.com/user/AshishMalik-8996
TOPICS IN FOCUS . General Terms and Facts The Solar system The Earth Asteroids MCQs The Moon . Meteoroids Ask Yourself
GENERAL TERMS AND FACTS Celestial bodies- The sun, the moon and all those objects shining in the night sky Stars- Some celestial bodies are very big and hot. They are made up of gases. They have their own heat and light, which they emit in large amounts -Constellations- While watching the night sky, you may notice various patterns formed by different groups of stars (Ursa Major or Big Bear) Pole Star-he North star indicates the north direction Planets- Some celestial bodies do not have their own heat and light. They are lit by the light of the stars Galaxy- is a huge system of billions of stars, and clouds of dust and gases
THE SOLAR SYSTEM The sun, eight planets, satellites and some other celestial bodies known as asteroids and meteoroids form the solar system. . We often call it a solar family, with the sun as its Head.
THE SUN The sun is in the centre of the solar system. . It is huge and made up of extremely hot gases. It provides the pulling force that binds the solar system. . The sun is the ultimate source of heat and light for the solar system. But that tremendous heat is not felt so much by us because despite being our nearest star, it is far away from us. .The sun is about 150 million km away from the earth.
PLANETS There are eight planets in our solar system. In order of their distance from the sun, they are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. [MY VERY EFFICIENT MOTHER JUST SERVED US NUTS) All the eight planets of the solar system move around the sun in fixed paths. They are called orbits Till recently (August 2006), Pluto was also considered a planet. However, in a meeting of the International Astronomical Union, a decision was taken that Pluto like other celestial objects (Ceres, 2003 UB313) discovered in recent past may be called 'dwarf planets' Venus is considered as 'Earth's-twin' because its size and shape are very much similar to that of the earth
THE EARTH The earth is the third nearest planet to the sun. In size, it is the fifth largest planet. It is slightly flattened at the poles. That is why, its shape is descibed as a Geoid . The earth is neither too hot nor too cold. It has water and air, which are very essential for our survival. The air has life-supporting gases like oxygen. Because of these reasons, the earth is a unique planet in the solar system. . From the outer space, the earth appears blue because its two-thirds surface is covered by water. It is, therefore, called a blue planet.
THE MOON Our earth has only one satellite, that is, the moon The moon moves around the earth in about 27 days. It takes exactly the same time to complete one spin. As a result, only one side of the moon is visible to us on the earth A Satellite is a celestial body that moves around the planets in the same way as the planets move around the sun
ASTEROIDS Apart from the stars, planets and satellites, there are num which also move around the sun. erous tiny bodies . These bodies are called asteroids. They are found between the orbits of Mars and Jupiter Scientists are of the view that asteroids are parts of a planet which exploded many years back
MCQS Tick the correct answer. (a) The planet known as the "Earth's Twin" is (b) Which is the third nearest planet to the sun ? (c) All the planets move around the sun in a (d) The Pole Star indicates the direction to the (e) Asteroids are found between the orbits of (i) Jupiter (i) Saturn (ili) Venus (i) Venus (ii) Earth (ili) Mercury () Circular path (i) Rectangular path (ifi) Elongated path (0) South (i) North (li) East () Saturn and Jupiter (ii) Mars and Jupiter () The Earth and Mars