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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 5 · 25 questions

Practice questions

01What do low free oxygen in early atmosphere and later oxygen increase together show?

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02How did gravity contribute to both atmosphere and internal structure of Earth?

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03Which combination best explains instability of early Earth?

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04Why can the development of complex life on Earth not be treated only as a biological event?

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05Which would be the best method to study Earth's evolution?

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06What does the sequence of atmosphere hydrosphere and biosphere teach in Earth's evolution?

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07How did repeated planetesimal impacts during Earth's accretion affect its internal evolution?

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08Which combination best explains early Earth remaining hot for a long time?

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09What was the most correct reason for layer formation inside Earth after differentiation?

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10What was the importance of materials like iron and nickel in Earth’s core formation?

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11Which aspect of early Earth conditions was important in the loss of the first atmosphere?

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12On what basis was origin of the secondary atmosphere different from the first atmosphere?

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13Why is gas release considered decisive in Earth's atmospheric evolution?

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14Why did condensation of water vapour become effective only when Earth began cooling?

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15Besides rainfall what condition was necessary for permanent oceans to form on Earth?

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16Dissolution of gases like carbon dioxide in oceans is an example of what?

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17What is the logic for placing chemical evolution before biological evolution?

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18Why can early oceans be called a chemical laboratory?

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19Early organisms developing in an oxygen-poor atmosphere supports which conclusion?

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20Why was the ozone layer not strong before photosynthesis?

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21Why did the possibility of complex life increase after oxygen accumulation?

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22How did the ozone layer help the transition from marine life to land life?

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23Why did the biosphere develop later in Earth's evolution?

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24Which statement correctly shows the relation between lithosphere and hydrosphere?

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25Presence of water vapour in the secondary atmosphere made which later change possible?

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