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Subjects

Geography

Evolution of the earth

In this Class 11 Geography topic from “The Origin and Evolution of the Earth,” students trace how Earth formed and changed over geological time. They learn about the early solar nebula, the separation of materials within the young planet, the development of the crust, atmosphere and oceans, and the gradual emergence of life. The topic connects major stages of Earth’s evolution with the geological processes that shaped its present structure.

Medium · Level 6 · 25 questions

Practice questions

01Which example clearly shows the role of biological processes in atmospheric evolution?

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02What is indicated by the presence of methane and ammonia in the early atmosphere?

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03If Earth's gravity was not sufficient what problem would occur in atmospheric evolution?

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04What was the combined role of gravity in Earth's layered structure and atmospheric retention?

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05How is the giant impact idea of the Moon linked with Earth's early evolution?

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06Why was water alone not sufficient for the origin of life on Earth?

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07In which example is the interaction of atmosphere hydrosphere and lithosphere clearest?

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08What was the main basis of change from unstable early surface to stable surface?

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09How did cooling of Earth’s surface affect the early stage of the water cycle?

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10Increase of oxygen in atmosphere after photosynthesis is an example of what type of process?

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11How should the role of ozone layer in evolution of complex life be understood?

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12How does study of ancient rocks help understand Earth's evolutionary sequence?

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13The difference between iron core and silicate crust in Earth's evolution is explained by what?

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14If oceans had not formed what would happen to balance of some atmospheric gases?

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15Why could oceans not be permanent before crust formation on early Earth?

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16What is the basis for calling biosphere a result of Earth systems?

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17How did lack of free oxygen in early atmosphere affect ozone formation?

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18What is the correct relation among physical chemical and biological processes in Earth's evolution?

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19How is the role of internal heat visible in both differentiation and gas release?

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20Why were oceans not immediately like modern oceans after water vapour changed into rain on early Earth?

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21Understanding chronology in Earth’s evolution is most useful in which type of questions?

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22If photosynthesis had started much later what would be the effect on atmospheric evolution?

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23Which process group best made harsh early Earth conditions life-supporting?

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24Which shared process linked formation of secondary atmosphere and hydrosphere?

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25Why is Earth's present atmosphere not like the early atmosphere?

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