Podcast
Questions and Answers
What theory did Alfred Wegener develop?
What theory did Alfred Wegener develop?
- Continental drift (correct)
- Ocean currents
- Volcanic eruption
- Plate tectonics
When did Alfred Wegener pass away?
When did Alfred Wegener pass away?
- 1948
- 1930 (correct)
- 1950
- 1920
What was the key clue in solving 'The Mystery of the Drifting Continents'?
What was the key clue in solving 'The Mystery of the Drifting Continents'?
- Icebergs
- Old rock formations
- Desert islands
- Submerged mountain range (correct)
What led to a solution for 'The Mystery of the Drifting Continents'?
What led to a solution for 'The Mystery of the Drifting Continents'?
What led to a heightened interest in mapping the ocean floor after World War II?
What led to a heightened interest in mapping the ocean floor after World War II?
What is the main idea of the passage?
What is the main idea of the passage?
What did the discovery of magnetic reversals on the ocean floor lead to?
What did the discovery of magnetic reversals on the ocean floor lead to?
What was the significance of finding cracks in the earth's crust, or lithosphere, as mentioned in the passage?
What was the significance of finding cracks in the earth's crust, or lithosphere, as mentioned in the passage?
What was the first physical evidence that the lithosphere actually moved on the surface of the earth?
What was the first physical evidence that the lithosphere actually moved on the surface of the earth?
What did scientists realize after solving 'The Mystery of the Drifting Continents'?
What did scientists realize after solving 'The Mystery of the Drifting Continents'?
Flashcards
Continental Drift
Continental Drift
The hypothesis that continents were once joined and have drifted apart over time.
Submerged mountain range
Submerged mountain range
A long chain of mountains under the ocean.
Post WWII Ocean floor mapping
Post WWII Ocean floor mapping
Mapping the ocean floor.
Magnetic Reversals
Magnetic Reversals
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Seafloor Spreading
Seafloor Spreading
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Lithosphere
Lithosphere
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Lithospheric Plates
Lithospheric Plates
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Magma Leaking
Magma Leaking
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Continents Riding Plates
Continents Riding Plates
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Study Notes
Alfred Wegener's Contribution
- Developed the theory of Continental Drift
Timeline
- Alfred Wegener passed away in 1930
Solving the Mystery of the Drifting Continents
- Key clue: Fit of the continents, like a jigsaw puzzle
- Solution: Seafloor spreading, where new oceanic crust is created at mid-ocean ridges
Ocean Floor Mapping
- Heightened interest after World War II due to the development of new technologies, such as sonar and submarines
Main Idea
- The passage discusses the solving of the mystery of the drifting continents, from Wegener's theory to the discovery of seafloor spreading
Seafloor Discoveries
- Discovery of magnetic reversals on the ocean floor led to the understanding of plate tectonics
- Finding cracks in the earth's crust, or lithosphere, provided evidence for plate movement
Physical Evidence
- The first physical evidence that the lithosphere actually moved on the surface of the earth was the discovery of mid-ocean ridges
Scientific Realization
- After solving the mystery, scientists realized that the Earth's surface is dynamic, with moving plates shaping our planet
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