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Plate tectonics explains why Earth’s continents are moving; the theory of continental drift did not provide an explanation. Elaborate.

Topic: Salient features of world’s physical geography;

1. Plate tectonics explains why Earth’s continents are moving; the theory of continental drift did not provide an explanation. Elaborate. (250 words)

Reference: NCERT Book For Class XI: Fundamentals of Physical Geography.

Why the question:

The question is part of the static syllabus of General studies paper – 1.

Key Demand of the question:

To write about how plate tectonic theory overcame the flaws of the continental drift theory.

Directive:

Elucidate – Give a detailed account as to how and why it occurred, or what is the particular context. You must be defining key terms where ever appropriate, and substantiate with relevant associated facts.

Structure of the answer:

Introduction:

Write about plate tectonics and the movement of continents and various theories put forward to explain them.

Body:

Write in brief about the continental drift theory and explains it briefly – forces it considers for the movement, supporting evidences it considers, critique of theory regarding the movement of the continents and its acceptance among scientists etc.

In the next part, write about plate tectonic theory, the mechanism of it and how it successfully explained the movement of continents. Use small and neat diagrams for better representation.

Conclusion:

Mention about general importance of the two theories and conclude your answer.