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4 solved questions on Astronomy
CSS 2026General Science & AbilityQ. 2
(a) Evaluate the impact of excessive fertilizer use on soil chemistry and groundwater quality. (b) Describe the structural organization of the solar system, including terrestrial planets, gas giants, dwarf planets. (c) Discuss the environmental and chemical challenges associated with polymer degradation. Evaluate the effectiveness of biodegradable plastics in addressing global plastic pollution. (d) Identify the major causes of food deterioration (biological, chemical, physical) and give examples for each.
#cssnexus #Excessive Fertilizer Use #Soil Chemistry #Groundwater Nitrate
CSS Nexus6 Nov 2026
CSS Special 2023General Science & AbilityQ. 2
(A) The age of the Universe is estimated to be 13.8 billion years. How was it estimated? (B) Explain the phenomenon of Solar Eclipse. (C) Describe the James Webb Space Telescope, its principles of operation, construction and importance. (D) Explain the Global Positioning System and its applications.
#cssnexus #Age of the Universe #Cosmic Microwave Background #Solar Eclipse
CSS Nexus6 Nov 2026
CSS 2021General Science & AbilityQ. 2
(a) Differentiate between a star and a planet. What is the magnitude of a star and how the color of stars is correlated with their temperatures? (b) 'Semiconductors are the Brains of Modern Electronics'. Explain in detail what this quotation means. (c) Briefly describe the most popular and accepted theory about the origin of the Universe. (d) What are the advantages and limitations of renewable energy resources? Briefly explain the prospects of non-conventional energy resources in Pakistan.
#cssnexus #Star and Planet #Magnitude of a Star #Colour of Stars
CSS Nexus6 Nov 2026
CSS 2018General Science & AbilityQ. 2
(A) Describe different methods to estimate the age of the Universe. (B) Explain the formation of Lunar Eclipse. (C) Explain the terms Dark Energy and Dark Matter. (D) Define the term Black Hole. What's expected inside it?
#cssnexus #Age of the Universe #Hubble Constant #Cosmic Microwave Background
CSS Nexus6 Nov 2026