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Subjects

Geography

Star formation, formation of planets, and our solar system

In this Class 11 Geography topic from “The Origin and Evolution of the Earth,” students explore how stars form from vast clouds of gas and dust and how planets emerge from the material surrounding a young star. They examine the formation and organisation of the solar system, including the Sun, planets, satellites, asteroids and comets, while connecting these processes with Earth’s place, structure and early development within the wider universe.

Medium · Level 2 · 25 questions

Practice questions

01The higher density of terrestrial planets is most related to which composition?

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02What is the correct reason for calling Jupiter and Saturn gas giants?

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03What is the basis for considering Uranus and Neptune as ice giants?

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04What explains the different locations of small rocky leftovers and icy leftovers in the solar system?

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05What is the correct difference between a meteor and a meteorite?

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06What is the effect of the Sun's huge mass on planetary motion?

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07The importance of Earth's suitable distance for life is linked with what?

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08Despite being called Earth's twin why is Venus less suitable for life?

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09What type of evidence helps in estimating the solar system age as about 4.6 billion years?

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10What was the most correct role of leftover material around the newly formed Sun?

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11Which major region comes after Mars in the order of planets and regions?

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12Why is the Moon not called a planet?

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13What is the general material difference between comets and asteroids?

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14The similarity in planetary direction and orbits supports which origin idea?

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15What is the importance of the interstellar medium in star formation?

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16Why can a protostar glow before nuclear fusion starts?

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17Due to higher temperature near the Sun which materials could not easily remain solid?

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18Which statement correctly explains the formation of Earth's core?

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19What is a general explanation for gas giants having many satellites?

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20What is the most scientific reason for considering the Sun as the central body of the solar system?

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21After Earth's formation which source is also considered for the availability of water?

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22If a body revolves around the Sun but has not cleared other bodies from its orbit what can it be?

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23What is the main reason small icy bodies are more common in the outer solar system?

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24Which is the correct matching of bodies formed at the centre and in the outer disk of the solar nebula?

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25Why did planetary composition change with distance from the Sun?

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