Physics of Earth — DU B.Sc. (Hons) Physics Previous Year Question Papers

Physics of Earth B.Sc. Prog.–Physical Sciences with Physics_NEP: UGCF-2022 1. 2. 3. Answer any six of the following 𝟔 × 𝟑 = 𝟏𝟖 (a) Outline the carbon cycle. (b) What is the difference between a depression contour and a normal contour on a topographic map? (c) What is the Coriolis effect? (d) What is the Richter scale? How are seismic waves detected using geophones? (e) What are mid-oceanic ridges and oceanic trenches? (f) What is the adiabatic lapse rate? Distinguish between dry and moist adiabatic lapse rates. (g) State the necessary conditions for cloud formation? (a) How does Deforestation affect the balance of ecosystems? What are the key factors causing Deforestation in India and around the world? Give any two prominent examples of Deforestation. (b) What is the chemical composition of seawater? What factors affect the salinity of ocean water? Why are oceans important to Earth's systems? (c) How does the Nebular Theory explain the formation of the solar system? 𝟒 (b) Differentiate between cyclones and anticyclones in terms of their formation mechanisms, pressure systems, wind circulation patterns, and associated weather conditions. Evaluate their impacts on regional and global climate systems, with suitable examples. (c) Briefly explain the origin of the Universe as described by the Big Bang model. (b) What is ocean circulation? What are the two main types of ocean circulation? What is the role of the Coriolis effect in ocean circulation? What are the primary factors driving surface ocean currents? (c) Explain how the tilt of Earth's axis and its orbit around the Sun contribute to the change in seasons. What role does Earth's spin play in this process? (a) Explain the mechanism of the Indian monsoon system. Include the role of land-sea breeze, pressure systems, and seasonal wind reversal. (b) Explain the geodynamical processes involved in the formation of island arcs. How are these arcs related to subduction zones, and what geological features accompany their formation? (c) What are the main differences between asteroids, comets, and dwarf planets in terms of composition and location in the solar system? Give examples. Compare the roles of the Asteroid Belt and the Kuiper Belt in shaping our understanding of planetary formation and the solar system's structure. (b) Describe the types of seismic waves generated during an earthquake. How do these waves help in understanding the Earth's internal structure? (c) Describe the evidence and methods used to study paleoclimate. 𝟒