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Geography

Continental Drift Theory and its evidence

In Class 11 Geography, this topic explains the Continental Drift Theory within the chapter “Distribution of Oceans and Continents.” Students learn Alfred Wegener’s idea that the continents were once joined as Pangaea and gradually moved apart. They examine evidence such as the matching shapes of coastlines, similar fossils, continuous rock formations, mountain belts, and past glacial deposits found on continents now far apart. The topic also introduces the theory’s limitations and its importance in the later development of plate tectonics.

Expert · Level 2 · 25 questions

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  1. Lack of evidence
  2. Lack of driving mechanism
  3. Lack of maps
  4. Lack of fossil names
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  1. First Laurasia and Gondwanaland then further smaller continents
  2. First modern countries then oceans
  3. First cities then mountains
  4. First rivers then planets
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  1. The same species always spreads by swimming across every ocean
  2. Biological distribution was continuous before continents separated
  3. Fossils form only in deserts
  4. Climate never changed on Earth
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  1. Rock belts on separated continents may once have been parts of one geological belt
  2. All rocks formed on the same day
  3. Rocks are not found on continents
  4. Oceans do not produce rocks
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  1. It strongly supported seafloor spreading and plate movement
  2. It destroyed fossils
  3. It made all rock ages zero
  4. It stopped Earth's rotation
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  1. Because sufficient knowledge about the nature and movement of ocean floor was unavailable
  2. Because oceans were not on Earth
  3. Because ocean floor is made only of ice
  4. Because Wegener did not name any ocean
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  1. Result of separation of formerly joined landmasses
  2. Result of the Moon hitting Earth
  3. Result of the Himalayas melting
  4. A valley suddenly cut by rivers
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  1. Matching of continental margins
  2. Fossil similarity
  3. Modern satellite-based GPS velocities
  4. Ancient glacial deposits
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  1. Ancient climate signs are found inconsistent with present latitude
  2. All continents get the same rainfall
  3. Winds push continents daily
  4. Sea salt creates climate
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  1. Direction and forces of continental drift
  2. River meandering
  3. Population migration
  4. Seasonal rainfall
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  1. Multiple independent evidences were presented for it
  2. It had no geological fact
  3. It was based only on poetry
  4. It was unrelated to maps
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  1. Breakup of Gondwanaland
  2. Freezing of Arctic Ocean
  3. Complete sinking of Europe
  4. Frequency of lunar eclipse
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  1. He gave useful evidence but did not explain adequate driving force
  2. Every fact of his was wrong
  3. He never discussed Pangaea
  4. His theory was only meteorology
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  1. One huge united landmass
  2. A modern ocean
  3. A volcanic island
  4. A glacial river
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  1. They may once have been parts of one structural belt
  2. They formed only by ocean currents
  3. They were built by humans
  4. They formed instantly by weather
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  1. New oceanic gaps developed and old connections broke
  2. All oceans disappeared
  3. Oceans changed into mountains
  4. Oceans changed only into rivers
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  1. Matching of continental margins does not appear merely accidental
  2. Continents are perfectly circular
  3. Oceans are fixed ice
  4. Shorelines never change
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  1. It uses geological fossil climatic and cartographic clues
  2. It contains only politics
  3. It contains only mathematical taxation
  4. It contains only modern satellites
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  1. It challenged the idea of fixed continents
  2. It called Earth a small planet
  3. It placed oceans in the sky
  4. It denied the existence of rocks
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  1. Because its wide distribution indicates a united glacial region
  2. Because tillite is sea salt
  3. Because tillite is modern industrial waste
  4. Because tillite only flies in deserts
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  1. Mainly horizontal movement
  2. Mainly plant growth
  3. Mainly atmospheric condensation
  4. Mainly change in ocean colour
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  1. It was too weak by calculation for such large continental displacement
  2. It was not related to the Moon
  3. It only formed fossils
  4. It made oceans disappear
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  1. Sediments of the Tethys region later became involved in mountain building by compression
  2. Tethys covered the Sun
  3. Tethys erased all fossils
  4. Tethys was always empty space
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  1. Distinguish Wegener's evidence from later plate tectonics
  2. Treat every modern term as Wegener's original term
  3. Call fossils climatic evidence
  4. Call Pangaea an ocean
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  1. The idea of mobile continents and collection of supporting evidence
  2. Explaining the colour of seawater
  3. Explaining farming in river valleys
  4. Making a daily list of atmospheric pressure

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