Continental Drift Theory Video Lecture | SSC CGL Tier 2 - Study Material, Online Tests, Previous Year

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1. What is the Continental Drift Theory?
Ans. The Continental Drift Theory, proposed by Alfred Wegener in 1912, suggests that continents were once joined together in a single landmass called Pangaea. Over millions of years, this supercontinent broke apart and the continents drifted to their current positions.
2. What evidence supports the Continental Drift Theory?
Ans. Evidence for the Continental Drift Theory includes the fit of continental coastlines, fossil similarities across continents, geological formations that match across oceans, and climate evidence such as glacial deposits found in now-warm regions, indicating that these areas were once located closer to the poles.
3. How does the Continental Drift Theory relate to plate tectonics?
Ans. The Continental Drift Theory laid the groundwork for the modern theory of plate tectonics. While Wegener proposed that continents drifted, plate tectonics explains the mechanisms behind this movement, including the movement of tectonic plates on the Earth's surface due to convection currents in the mantle.
4. What were the criticisms of the Continental Drift Theory?
Ans. Critics of the Continental Drift Theory argued that Wegener could not adequately explain the mechanism driving the movement of continents. They believed that large landmasses could not drift through the solid ocean floor. It wasn't until the acceptance of plate tectonics in the mid-20th century that these criticisms were addressed.
5. How has the understanding of Continental Drift changed over time?
Ans. Initially dismissed by many geologists, the understanding of Continental Drift evolved significantly with advancements in technology and research, particularly in the fields of geology and geophysics. The discovery of seafloor spreading and the development of plate tectonics provided a scientific basis that validated and expanded upon Wegener's original ideas.
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