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SC.7.N.3.19. Wegener originally believed that the continents were moving through the earth's crust, likeicebreakers plowing through ice sheets, and that tides were responsible for moving thecontinents. Today, scientists have discovered additional evidence to support his idea that thecontinents are moving but have developed new ideas to explain how they move. What doesthis discovery suggest about Wegener's theory?A. It may need to be modifiedB. It should be discarded as incorrectC. It is supported by modern and historical evidenceD. It is correct in its original form about all species



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The correct answer is A. It may need to be modified. Since science is an accumulative enterprise, historical hypothesis might had grasp the essential idea, but as new techonology becomes available to test this hypothesis, they might need to be modified in its details.

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