Fri. Jan 10th, 2025

Continents and Oceans

  1. Who propounded the concept of continental drift?

    Options:
    1. Edward Suess
    2. J. Steers
    3. Alfred Wegener
    4. Palaeo-climatologists

    Option: C

  2. When did Wegener’s concept on continental drift first come to light?

    Options:
    1. 1912
    2. 1922
    3. 1924
    4. 1961

    Option: B

  3. What were the two ways that climatic changes could be explained according to Wegener?

    Options:
    1. Plate tectonics and volcanic activity
    2. Continental drift and ocean currents
    3. Stationary continents and shifting climatic zones
    4. Stationary climatic zones and drifting landmasses

    Option: C

  4. Which part of the Pangaea was Lauratia?

    Options:
    1. The northern part
    2. The southern part
    3. The eastern part
    4. The western part

    Option: A

  5. What was the name of the huge water body that surrounded Pangaea?

    Options:
    1. Panthalasa
    2. Pacific Ocean
    3. Atlantic Ocean
    4. Indian Ocean

    Option: A

  6. What is Pangaea?

    Options:
    1. A continent in present day Africa
    2. A period in geological history
    3. A single landmass comprising of all the present-day continents
    4. A geological term for volcanic activity

    Option: C

  7. What is the evidence provided by Wegener to support the existence of Pangaea?

    Options:
    1. Geological records
    2. Climatic records
    3. Floral records
    4. All of the above

    Option: D

  8. What is the main evidence for the similarity of the opposing coasts of the Atlantic Ocean?

    Options:
    1. Geological records
    2. Climatic records
    3. Floral records
    4. Jig-saw fitting

    Option: D

  9. What is the evidence for the similarity of the mountain systems in the western and eastern coastal areas of the Atlantic?

    Options:
    1. Geographical similarity
    2. Geological similarity
    3. Climatic similarity
    4. Floral similarity

    Option: B

  10. What is the evidence for the movement of landmasses with respect to each other?

    Options:
    1. Geodetic evidence
    2. Climatic evidence
    3. Floral evidence
    4. Geological evidence

    Option: A

  11. What is the evidence for the unification of all landmasses in one landmass during the Carboniferous period?

    Options:
    1. Distribution of glossopteris flora
    2. Carboniferous glaciation
    3. Jig-saw fitting of opposing coasts
    4. Similarity of fossils and vegetation remains

    Option: B

  12. What behavior of lemmings supports the fact that landmasses were united in the ancient times?

    Options:
    1. They migrate to far-off places in the western direction
    2. They prefer to stay near the coastlines
    3. They are found only in certain regions of the world
    4. They are immune to extreme weather conditions

    Option: A

  13. According to Du Toit, why can’t the landmasses of South America and Africa be actually brought together?

    Options:
    1. Due to the existence of continental shelves and slopes of these two landmasses
    2. Due to the presence of deep ocean trenches between them
    3. Due to the differences in their climatic conditions
    4. Due to the presence of large deserts in between them

    Option: A

  14. What is the rate at which Greenland is drifting westward?

    Options:
    1. 2 cm per year
    2. 20 cm per year
    3. 200 cm per year
    4. 2000 cm per year

    Option: B

  15. What was the main aim of Wegener behind the postulation of his ‘drift theory’?

    Options:
    1. To explain the origin of mountains
    2. To explain the formation of islands
    3. To explain major climatic changes in the past geological history of the earth
    4. To explain the evolution of ocean basins

    Option: C

  16. According to Wegener, what caused the equatorward movement of sialic blocks?

    Options:
    1. Gravitational differential force and force of buoyancy
    2. Tidal force of the sun and the moon
    3. Disruption rifting and ultimately drifting of the continental blocks
    4. None of the above

    Option: A

  17. What caused the westward movement of the continents according to Wegener?

    Options:
    1. Gravitational differential force and force of buoyancy
    2. Tidal force of the sun and the moon
    3. Disruption rifting and ultimately drifting of the continental blocks
    4. None of the above

    Option: B

  18. When did the actual drifting of the continents begin according to Wegener?

    Options:
    1. Silurian period
    2. Carboniferous period
    3. Cretaceous period
    4. Tertiary period

    Option: B

  19. What was the name of the water body that filled up the intervening space between the northern and southern parts of Pangaea?

    Options:
    1. Tethys Sea
    2. Arctic Ocean
    3. North Sea
    4. Pacific Ocean

    Option: A

  20. What caused the formation of the western Cordilleras of the two Americas?

    Options:
    1. Gravitational differential force and force of buoyancy
    2. Tidal force of the sun and the moon
    3. Disruption rifting and ultimately drifting of the continental blocks
    4. None of the above

    Option: C