Important Geophysical Phenomena


                                                                  This is a dynamic E-Book comprising the below UPSC Mains Model Questions as well as their answers written by GKToday team. The PDF E-Book can be instantly downloaded after payment. No Hadcopy is provided.
                                                                1. Most of the unusual climatic happenings are explained as an outcome of the El-Nino effect. Do you agree?
                                                                2. Explain the meaning of soil retrogression while differentiating it from soil degradation. What are the major consequences of soil retrogression and degradation?
                                                                3. What are the major characteristics of El Nino that reappear with its every cycle? Examine the impacts of El Nino on regional climate, ecosystems and human activities with reference to (1) Australia (2) California
                                                                4. Give a comparative account of structure and associated weather conditions of tropical cyclone with that of temperate cyclone.
                                                                5. What are the conditions for a hurricane to form? Enumerate various categories of Hurricanes as per Saffir-Simpson hurricane scale.
                                                                6. If the Earth's axis were tilted at 40° to the plane of the ecliptic instead of 23½°, what would be the effects of this change on (1) global climate and seasons (2) seasons and climate of India?
                                                                7. Explain the role of the polar front and the air masses that come in conflict in the polar front zone in the temperature and precipitation cycles of the mid latitude and high latitude climates.
                                                                8. What are the conditions for tropical cyclone formation? Why there is variation in frequency and intensity of cyclones in the Bay of Bengal and Arabian Sea? Discuss.
                                                                9. Differentiate between between cyclone, hurricane, tornado and twister. Explain the necessary conditions for their formation. Which of these are generally observed in India and at which places?
                                                                10. Discuss the constructive and destructive effects of volcanic eruptions with suitable examples.
                                                                11. Define gravitational waves. What are the tangible benefits of detecting and studying the gravitational waves? Explain.
                                                                12. Why the CSIR National Physical Laboratory (CSIR-NPL) is advocating for two time zones in India?
                                                                13. What are potential impacts of the Indian monsoons on Atlantic hurricanes?
                                                                14. Discuss effects of volcanic eruptions. Why the Pacific region is known as the ring of fire?
                                                                15. Why fewer cyclones originate in Arabian Sea compared to Bay of Bengal? Discuss the details of the cyclone warning system in India.
                                                                16. What could be the possible reasons of the slower-than-expected progress of the western branch of the Southwest monsoon in 2019?
                                                                17. What is the Heat Wave? Explain the after effects of Heat wave on living beings and also on the economy.
                                                                18. Global Climate Risk Index 2020 Published
                                                                19. What are Walker circulations and how does it influence the Indian monsoons?
                                                                20. What is Atlantic Meridional Overturning Circulation (AMOC)? Discuss the reasons for recent decline in the AMOC and its associated impact.
                                                                21. While discussing the temperature distribution of ocean water, highlight the factors responsible for it.
                                                                22. Explain the formation of tropical cyclones. Also, illustrate the global distribution of these cyclones.
                                                                23. Explain the process of formation of a rift valley, emphasizing on the Great Rift Valley system.
                                                                24. How are plateaus formed? Also briefly discuss the features of the Deccan Plateau and its economic significance.
                                                                25. Explain the processes of pedogenesis, and identify the active and passive factors affecting it.
                                                                26. Thunderstorms, lightning and many such events are witnessed during Pre-monsoonal season in India. Explain their formation process and its impact on various regions of India.
                                                                27. Explain Madden-Julian oscillations and its difference from El-Nino? Discuss its impact on Indian monsoon.
                                                                28. Explain the role played by endogenic forces in forming various landforms on the earth.
                                                                29. Identifying the factors responsible for formation of tides, discuss their geographical and economic significance.
                                                                30. What are rossy waves? Discuss the role played by them in shaping the climate of the earth.
                                                                31. Explain the phenomenon of Western disturbance and discuss its impact on the Indian weather system.
                                                                32. Draw out a comparison between Savannah and steppe types of climate in terms of economic and geographical aspects.
                                                                33. Disclaimer: These questions have been written and answered by GKToday team over the period of time; and have included some previous years questions also. While every effort was made to ensure that these questions as well as their answers remain relevent and correct, it is possible, that some facts or context in some questions might have changed over time. GKToday does not assume and hereby disclaims any liability to any party for any loss, damage, or disruption caused by such change of facts or context in the questions and answers of this E-book.

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