Fri. Jan 10th, 2025

Climatic Change

  1. What is radiocarbon dating or carbon-14 analysis?

    Options:
    1. It is a technique used to determine the age of fossils based on the analysis of oxygen isotopes in the shells of dead animals.
    2. It is a technique used to determine the age of fossils based on the analysis of carbon-14 and carbon-12 contained in the skeletons of fossilized animals.
    3. It is a technique used to determine the age of fossils based on the analysis of crystal patterns in the shells of dead animals.
    4. It is a technique used to determine the age of fossils based on the analysis of the proportion of oxygen-16 to oxygen-18 in the shells of dead animals.

    Option: B

  2. How does the isotope analysis of the chemistry of skeletons of fossilized animals help in determining palaeoclimates?

    Options:
    1. By analyzing the crystal patterns in the shells of dead animals.
    2. By analyzing the proportion of oxygen-16 to oxygen-18 in the shells of dead animals.
    3. By analyzing the carbon-14 and carbon-12 contained in the skeletons of fossilized animals.
    4. By analyzing the settling of oxygen isotopes in the shells of dead animals.

    Option: C

  3. What does the occurrence of large numbers of animal fossils in close proximity indicate?

    Options:
    1. They were killed during a catastrophic disaster.
    2. They died due to natural causes.
    3. They died over a long period of time.
    4. They were buried alive.

    Option: A

  4. What are the geological indicators of paleoclimates?

    Options:
    1. Igneous rocks
    2. Sedimentary deposits
    3. Metamorphic rocks
    4. Volcanic ash

    Option: B

  5. What are verve’s?

    Options:
    1. Layers of igneous rocks
    2. Layers of metamorphic rocks
    3. Layers of fine silts and clays deposited at the floors of lakes and ponds
    4. Layers of volcanic ash

    Option: C

  6. What does the deposition of evaporite deposits, such as salt, indicate?

    Options:
    1. High precipitation
    2. High temperature and aridity
    3. Low temperature and humidity
    4. Low precipitation

    Option: B

  7. What does the occurrence of limestones in regions with cold climates indicate?

    Options:
    1. The region was under tropical warm climate at the time of limestone deposition.
    2. The region was under a cold climate at the time of limestone deposition.
    3. The limestone was formed through volcanic activity.
    4. The limestone was formed through metamorphism.

    Option: A

  8. Lateritic crusts indicate about the climate of the area

    Options:
    1. Hot and humid climate
    2. Cold and humid climate
    3. Cold and dry climate
    4. Hot and dry climate

    Option: A

  9. What is the significance of analyzing palaeosols and fossils of plants and animals in alluvial soils buried in older floodplains?

    Options:
    1. It provides information about the past climate.
    2. It provides information about the current climate.
    3. It provides information about the future climate.
    4. It provides information about the history of volcanic activity.

    Option: A

  10. The science that deals with glaciation and glaciers is

    Options:
    1. Glaciationology
    2. Cryogenic indicators
    3. Geomorphology
    4. Glaciology

    Option: D

  11. The processes of glaciation and deglaciation provide significant data for

    Options:
    1. Geology
    2. Climatic changes and fluctuation
    3. Archaeology
    4. None of the above

    Option: B

  12. The period of widespread glaciation of larger areas on the globe is called

    Options:
    1. Interglacial period
    2. Great ice age
    3. Glacial period
    4. None of the above

    Option: B

  13. Who is given credit for an early start in the field of glaciology and for the recognition and identification of the presence of ice age during Pleistocene period?

    Options:
    1. Louis Agassiz
    2. Jean de Charpentier
    3. John Playfair
    4. All of the above

    Option: A

  14. How many glacial periods were identified during Pleistocene ice age by Penck and Bruckner?

    Options:
    1. Two
    2. Three
    3. Four
    4. Five

    Option: C

  15. Which of the followings is/are provide important clues for climatic changes

    Options:
    1. The shapes of glaciated valleys
    2. Glacial drifts
    3. Erratics (glacial boulders)
    4. All of the above

    Option: D

  16. What do advancing glaciers and ice sheets indicate?

    Options:
    1. Ablation of glaciers
    2. Onset of warmer climate
    3. Increase in temperature
    4. Lowering of temperature much below freezing point

    Option: D

  17. What is the most significant cryogenic indicator of paleoclimates?

    Options:
    1. Glaciers
    2. Glacial valleys
    3. Ice sheets and ice cores
    4. Ice caps

    Option: C

  18. The study of each ice layer in the great ice caps of Greenland and Antarctica useful for?

    Options:
    1. The study of the underlying rock formations
    2. The study of the atmospheric dusts
    3. The study of the weather and climatic conditions at the time of its formation
    4. None of the above

    Option: C

  19. The basis of the analysis of ice cores to obtain climatic records is

    Options:
    1. Concentration of radon
    2. Concentration of carbon dioxide
    3. Concentration of oxygen
    4. Concentration of methane

    Option: C

  20. Which of the following is not a relationship revealed by the isotope analysis of ice cores?

    Options:
    1. Concentration of greenhouse gases
    2. Environmental temperatures
    3. Levels of atmospheric pollution
    4. Levels of ozone depletion

    Option: D