EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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he could not provide evidence to support his claim
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the puzzle fit was his only evidence and scientists thought it was a coincidence
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he could not explain what mechanism caused the plates to move
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he claimed continents drifted on the oceans
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Detailed explanation-1: -The main reason that Wegener’s hypothesis was not accepted was because he suggested no mechanism for moving the continents. He thought the force of Earth’s spin was sufficient to cause continents to move, but geologists knew that rocks are too strong for this to be true.
Detailed explanation-2: -Holmes proposed that the continents, which “floated” on the Earth’s mantle, moved with the convection flow of the magma (hot semifluid below the Earth’s crust). The mechanism of continental drift is like the flow of branches floating in the moving waters of rivers, as shown in Figure 3-11.4.
Detailed explanation-3: -The drift according to him, might have occurred due to centrifugal forces of earth or astronomical changes. Continents could not possibly the way he described it because he did not provide any hard evidence that would give the ultimate cause or mechanism for the continents to move.
Detailed explanation-4: -One of the main objections to the continental drift hypothesis was its inability to provide an acceptable mechanism for the movement of continents.