1) Discuss how the theory of plate tectonics is an improvement over the theory of continental drift.

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Topic: Salient features of world’s physical geography.

1) Discuss how the theory of plate tectonics is an improvement over the theory of continental drift. (250 Words)

NCERT Class XI, Fundamentals of Physical Geography

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WHY THIS QUESTION

In geography direct conceptual questions can be asked and the question is related to GS-1 syllabus under the following heading- Salient features of world’s physical geography.

KEY DEMAND OF THE QUESTION.

The question wants us to discuss how theory of plate tectonics is a better and improved scientific explanation for describing various tectonic processes. We have to present facts in favour of the same.

DIRECTIVE WORD

Discuss- we have to write in length and compare both the theories and discuss evidences which prove that the theory of plate tectonics is an improvement over the theory of plate tectonics.

STRUCTURE OF THE ANSWER

Introduction- introduce your answer by briefly describing both the theories one by one, along with name of scientist and year.

Body- after mentioning that theory of plate tectonics is an improvement over theory of continental drift, divide the body into parts and present evidences/ facts in favour of your stand. E.g tidal forces and centrifugal forces are too small to bring such changes, magnetite striping and seafloor spreading, pacific ring of fire etc.

Conclusion- in the end mention that the theory of plate tectonics has absorbed both the theories and built upon them to give a better explanation of various geophysical phenomena around us. .