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Subjects

Geography

Early and modern theories

In Class 11 Geography, this topic explores how explanations for the origin and evolution of the Earth developed from early philosophical ideas to modern scientific theories. Students compare major hypotheses, including nebular explanations, and examine the astronomical, geological, and physical evidence used to understand the formation of the solar system and Earth. The topic also shows how observations, discoveries, and improved scientific models continually refine our understanding of the planet.

Medium · Level 4 · 25 questions

Practice questions

01In which idea is the transformation of a large nebula into a flat disk important?

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02Which option gives correct evidence for the Big Bang theory?

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03Why is the probability of a passing star considered a problem in old theories?

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04Which theory explains planet origin through a solar cloud disk rather than matter directly pulled from the Sun?

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05With what does the modern theory connect the similar direction of motion of planets in the solar system?

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06Which theory can be compared with dust particles slowly joining together to form planets?

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07Which statement correctly gives the basic assumption of the steady state theory?

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08Which question clue indicates that the answer should be the Big Bang theory?

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09While reviewing early theories, what should be specially considered?

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10Which option correctly matches a theory with its main evidence?

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11Which process is related to the formation of Earth's core in early Earth?

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12If a statement says planets formed from a common rotating gas-dust cloud, which theory does it match?

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13Which statement correctly states a difference between the Big Bang theory and the steady state theory?

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14Why are collisions not considered only destructive in modern planet formation theory?

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15Which option gives the correct reason for the origin of Earth's early atmosphere?

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16Laplace and Kant's ideas are placed in which broad category?

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17Which theory explains planet formation from a large gas and dust cloud rather than cooled matter separated from the Sun?

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18What happens in scientific theories when new evidence appears?

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19Which statement shows the correct order of Earth's development?

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20Which theory explains Earth's origin through physical processes rather than directly through origin of life?

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21If an exam asks which theory is more accepted today for the origin of the solar system, what is the correct answer?

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22How can asteroids be understood in the modern solar nebula theory?

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23In Buffon's early idea, planet formation was linked with which event?

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24In Kant's nebular hypothesis, what mainly caused matter to move from spread-out form toward concentration?

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25In Laplace's hypothesis, after rings separated from the contracting nebula, they were assumed to change into what?

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