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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.

Hard · Level 2 · 25 questions

Practice questions

01Why is a multi factor view more suitable for the origin of Earth's water?

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02What origin of the Moon is explained by the giant impact hypothesis?

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03The presence of the Moon is linked with which long term stability in the Earth system?

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04The very large mass of the Sun is the cause of which major arrangement in the solar system?

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05How is the distribution of mass and angular momentum understood in the solar system?

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06If a body revolves around the Sun but does not clear its orbit which classification is suitable?

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07What is the most suitable reason for placing Uranus and Neptune in a different subtype from Jupiter and Saturn?

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08What can factors like magnetic fields and turbulence do in star formation?

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09What effect does removal of gas from the protoplanetary disk have on planet formation?

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10Why did thick hydrogen helium atmospheres not remain on terrestrial planets?

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11Earth's secondary atmosphere is mainly considered linked with which process?

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12Why could liquid water remain on Earth for a long time?

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13What is the main cause of the strong greenhouse effect on Venus?

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14Mars's thin atmosphere and cold conditions can be linked with what?

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15Why is radiometric dating important in studying the age and origin of the solar system?

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16Which clue indicates the nearly common origin of the solar system?

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17What does condensation sequence mean in planetary composition?

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18Which process is most suitable for formation of core and mantle in rocky planets?

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19How can strong wind from a young star affect later planet formation?

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20If cores of outer planets had not formed quickly enough what could have happened?

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21What does abundance of volatile materials in comets tell about their origin region?

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22In solar system formation the struggle between gravity and thermal pressure is most clear in which stage?

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23According to the solar nebula theory what is the general reason for chemical similarity of the Sun and planets?

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24The origin of Earth's magnetic field is linked with which internal structure?

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25Why is study of leftover small bodies after planet formation useful?

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