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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.

Hard · Level 6 · 25 questions

TOPIC PRACTICE

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  1. Possibility of old geological connection between Africa and South America
  2. Atlantic being a modern river
  3. Europe being Gondwanaland
  4. Coasts having only same colour
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  1. He gave an important evidence based idea but mechanism was weak
  2. He gave no evidence
  3. He proved Earth fixed
  4. He explained only agriculture
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  1. His theory had no evidence
  2. He called continents fixed
  3. He gave important evidences but modern mechanism was clarified by plate tectonics
  4. He explained only daily weather
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  1. Fossil evidence—Mesosaurus
  2. Glacial evidence—Tillite
  3. Mineral evidence—Placer gold deposits in Ghana
  4. Plant fossil evidence—Tethys
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  1. The theory was fully proved only by coastline fit
  2. Coastline fit gives visual clue
  3. Fossil similarity indicates old contact
  4. Rock similarity shows geological relation
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  1. Panthalassa was the joined landmass and Pangaea was the ocean
  2. Pangaea was the joined landmass and Panthalassa was the surrounding ocean
  3. Pangaea was an ancient mountain range and Panthalassa was a plateau
  4. Pangaea was a glacial deposit and Panthalassa was a fossil region
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  1. India's southern origin and northward movement leading to collision
  2. India was always in Europe
  3. India was Panthalassa
  4. Himalaya formed only by river
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  1. Tillite and Mesosaurus
  2. Panthalassa and Tethys
  3. Pole fleeing and tidal force
  4. Laurasia and Pangaea
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  1. Observing rainfall of one city
  2. Comparing coastline rock fossil and climatic clues of different continents
  3. Measuring length of one river
  4. Observing soil of one field
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  1. Because former positions and climates of landmasses may have been different
  2. Because no maps are made of Earth
  3. Because rocks do not exist
  4. Because fossils are always modern
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  1. Wegener's evidence shows old connection and plate tectonics explains movement mechanism
  2. Wegener's evidence shows politics
  3. Plate tectonics rejects fossils
  4. Modern explanation calls continents fixed
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  1. Main criticism was weakness of driving force
  2. Mechanism was unclear despite evidences
  3. Wegener had no evidence at all
  4. Direct drifting over ocean floor was considered difficult
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  1. When similar fossils occur on distant separate continents in similar geological context
  2. When fossils occur at only one place
  3. When fossil has no relation with geography
  4. When fossil is modern plastic
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  1. Age structure and continuity of rocks
  2. Size of cities
  3. Today's rainfall
  4. Colour of sea
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  1. Tethys was the middle sea and Panthalassa the outer ocean surrounding Pangaea
  2. Both are modern cities
  3. Both are plant fossils
  4. Both are polar forces
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  1. Continental position can change over long geological time
  2. Continents are only colours on maps
  3. Earth has no oceans
  4. Rocks are man made
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  1. Coastline fit and placer gold
  2. Mesosaurus and Glossopteris
  3. Tillite and glacial striation
  4. Pole fleeing and tidal force
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  1. Correct because Pangaea was a plant
  2. Incorrect because Pangaea is an explanatory supercontinent concept
  3. Correct because Pangaea was Mesosaurus
  4. Incorrect because Pangaea was tidal force
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  1. Testing one conclusion through coastline rock fossil and climate evidences
  2. Only guessing
  3. Observing only today's weather
  4. Reading only political map
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  1. India is considered an ancient landmass linked with Gondwanaland
  2. India moved northward
  3. India's movement is linked with Himalayan context
  4. India always remained fixed west of the Atlantic
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  1. Because it began early scientific debate on continental mobility
  2. Because it denied plates
  3. Because it removed oceans
  4. Because it called fossils impossible
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  1. Mesosaurus and similar rock structure
  2. Panthalassa and tidal force
  3. Tethys and pole fleeing
  4. Today's rainfall and city
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  1. Both support from evidences and historical weakness of mechanism
  2. Only that there was no evidence
  3. Only that Earth is fixed
  4. Only that weather changes
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  1. Tillite is evidence of glacial action
  2. Mesosaurus was a force that moved continents
  3. Pole-fleeing force was one of the driving forces proposed by Wegener
  4. Similarity of rocks across continents is geological evidence
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  1. It was an evidence based early hypothesis whose mechanism was given by modern plate tectonics
  2. It was only a religious story
  3. It was an idea saying continents are fixed
  4. It was only a theory of daily weather

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