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10 Questions

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Continental Drift Theory

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Questions and Answers

What was the name of the scientist who found the highest points along a submerged mountain range in the Atlantic Ocean?

Sonar Mapper

Alfred Wegener

Unknown (correct)

Mid-Atlantic Explorer

What was the key clue in solving 'The Mystery of the Drifting Continents'?

Increased interest in mapping the ocean floor after World War II

Alfred Wegener's theory of continental drift

Discovery of cracks in the earth's crust

Identification of surprisingly young volcanic rock on submerged mountain ranges (correct)

What happened to Alfred Wegener's theories after his passing in 1930?

They were generally dismissed (correct)

They were proven to be incorrect

They were widely accepted by the scientific community

They led to new investigations

What was one of the strengths of science highlighted in the text?

The ability of new evidence to cause existing theories to change Signup and view all the answers

'The Mystery of the Drifting Continents' was eventually solved by:

'New Evidence from Below' Signup and view all the answers

What was the first physical evidence that the lithosphere actually moved on the surface of the earth?

The observation of magma leaking out of cracks in the ocean floor, leading to seafloor spreading Signup and view all the answers

What led to the idea of seafloor spreading?

The discovery of a pattern of stripes where magnetic orientation switched on either side of mid-ocean ridges Signup and view all the answers

What did scientists find that indicated the continents didn't move through the ocean crust, but were part of a larger moving piece of crust called a plate?

The observation that rocks nearer to mid-ocean ridges were much younger than similar rocks farther away from the ridge Signup and view all the answers

What caused scientists to conclude that both kinds of crust were often different parts of the same piece of crust named plates?

The discovery that both continental and oceanic crusts were often different parts of the same piece named plates Signup and view all the answers

What was a critical discovery into solving 'The Mystery of Drifting Continents'?

Seafloor spreading caused by magma leaking out of ocean floor cracks. Signup and view all the answers