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Geography

Continental Drift Theory and its evidence

In Class 11 Geography, this topic explains the Continental Drift Theory within the chapter “Distribution of Oceans and Continents.” Students learn Alfred Wegener’s idea that the continents were once joined as Pangaea and gradually moved apart. They examine evidence such as the matching shapes of coastlines, similar fossils, continuous rock formations, mountain belts, and past glacial deposits found on continents now far apart. The topic also introduces the theory’s limitations and its importance in the later development of plate tectonics.

Expert · Level 1 · 25 questions

Practice questions

01What was the most central conclusion of Wegener's Continental Drift Theory?

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02What did Wegener call the vast ocean surrounding Pangaea?

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03In Continental Drift Theory what was the northern part of Pangaea considered to be?

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04Which present landmasses are mainly considered part of Gondwanaland?

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05The matching of South America's east coast and Africa's west coast relates to which evidence?

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06The scientific fit of Africa and South America is considered better on which basis rather than ordinary shorelines?

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07How do same-aged rock groups in Africa and Brazil strengthen Wegener's theory?

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08The presence of tillite in South Africa Brazil India and Australia indicates which past environment?

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09What is the significance of similar directions of glacial striations in Gondwana regions?

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10Why is the Mesosaurus fossil considered strong evidence of continental drift?

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11Glossopteris plant fossils belong to which category of evidence?

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12If identical fossils are found on two now separated continents and the organism could not cross open ocean what is the best explanation?

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13Which force did Wegener mainly suggest for the westward movement of continents?

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14According to Wegener movement toward the equator was related to which force?

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15What was the greatest scientific weakness of Wegener's theory?

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16According to Continental Drift Theory between which two giant landmasses was the Tethys Sea located?

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17In Wegener's theory around what time is the breakup of Pangaea generally considered to have begun?

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18Why is the similarity of facing coasts of Africa and South America not considered decisive by itself?

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19The comparison of gold deposits on the Ghana coast and goldfields in Brazil provides what type of evidence?

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20In Continental Drift Theory India's northward movement is broadly linked with which later result?

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21In Wegener's theory continents were considered to move through which medium which later drew criticism?

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22Which is the best example of palaeoclimatic evidence in Continental Drift Theory?

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23If a continent is tropical today but contains ancient glacial rocks what may it indicate?

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24What was the main reason Wegener's theory did not gain immediate full acceptance?

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25What is the most important difference between Continental Drift Theory and Plate Tectonics?

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