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Plate Tectonics Objective Question and Answer

Plate Tectonics MCQ Multiple Choice Questions - Page 4 for Practice

Plate Tectonics MCQ Questions for Practice

46. Who came up with the theory of sea floor spreading?

Alfred Wegener
Harry Hess
ancient Greeks
Albert Einstein

Correct Answer is: Harry Hess

Show Answer-46

47. Why is a divergent boundary also called a constructive boundary?

Magma flows up between the plates and forms new crust.
Old ocean floor is re-melted into magma
Animals in the ocean construct nests there.
Pacific Ocean becomes wider

Correct Answer is: Magma flows up between the plates and forms new crust.

Show Answer-47

48. Why is Earth not growing in spite of sea floor spreading?

because of subduction in the Atlantic Ocean.
because of subduction in the Indian Ocean.
because of subduction the Pacific Ocean.
because of subduction in the Gulf of Mexico.

Correct Answer is: because of subduction the Pacific Ocean.

Show Answer-48

49. Why was Wegeners theory forgotten?

He could not explain how the continents could move.
It was not a good theory.
He did not publish his theory.
He did not have money.

Correct Answer is: He could not explain how the continents could move.

Show Answer-49

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