Oceanography

Tested in 5 real MPSC questions across 2 years (2017–2023). See it in context on the interactive Concept Graph →

Years it was asked

2023 2017

What you need to know first

Basic understanding of TsunamiOcean relief featuresPlate boundariesConditions for coral growthWorld geographyUpwelling mechanismCoral habitat requirementsFactors affecting salinityMajor seas of the world

Real questions that test this

पश्चिम पॅसिफिक महासागराच्या किनारवर्ती भागात प्रामुख्याने सागरीगर्ता आढळतात कारण Trenches are found mainly along the coast of the western Pacific Ocean because

a)पॅसिफिक महासागराच्या पश्चिमेकडील किनारवर्ती भाग अधोगमन क्षेत्राचा आहे / The western margin of the Pacific Ocean is the sub-duction zone&check; Correct

b)पॅसिफिक महासागराच्या पश्चिम किनारी भागाला समांतर पर्वतरांगा पसरल्या आहेत / Along the western border of the Pacific Ocean parallel mountain ranges are aligned

c)पॅसिफिक महासागराच्या पश्चिमेकडील भागात खंडान्त उतार तीव्र आहे / The continental slope of the western part of the Pacific Ocean is steep

d)पॅसिफिक महासागराच्या पश्चिमी भागात सागरीगर्ता मोठ्या प्रमाणावर आढळतात / The western part of the Pacific Ocean is characterised by a large number of trenches

Oceanic trenches are formed along convergent plate boundaries (subduction zones) where oceanic crust sinks beneath another plate, prominently seen in the western Pacific margin.

खालील पैकी कोणता घटक प्रवाल किटकांच्या वाढीला कारणीभूत आहे? Which of the following factor is responsible for low coral growth?

1)सागर जलाचे अधोवहन / Downwelling of sea water

2)सागर जलाचे उर्ध्ववहन / Upwelling of sea water&check; Correct

3)सागर जलाचे तळप्रवाह / Under current of sea water

4)औष्णिकक्षारतामूलक प्रवाह / Thermohaline current

Upwelling brings cold, nutrient-rich deep water to the surface, which lowers temperatures and introduces excess nutrients/turbidity that hinder coral growth.

वाढत्या क्षारतेनुसार समुद्रांचा बरोबर क्रम ओळखा. / Identify the correct sequence of the seas on the basis of increasing salinity.

1)मृत समुद्र, कॅरिबियन समुद्र, अंदमान समुद्र, बाल्टिक समुद्र / Dead Sea, Caribbean Sea, Andaman Sea, Baltic Sea

2)बाल्टिक समुद्र, अंदमान समुद्र, कॅरिबियन समुद्र, मृत समुद्र / Baltic Sea, Andaman Sea, Caribbean Sea, Dead Sea&check; Correct

3)अंदमान समुद्र, बाल्टिक समुद्र, कॅरिबियन समुद्र, मृत समुद्र / Andaman Sea, Baltic Sea, Caribbean Sea, Dead Sea

4)बाल्टिक समुद्र, कॅरिबियन समुद्र, अंदमान समुद्र, मृत समुद्र / Baltic Sea, Caribbean Sea, Andaman Sea, Dead Sea

The official MPSC answer key confirms the correct answer is "बाल्टिक समुद्र, अंदमान समुद्र, कॅरिबियन समुद्र, मृत समुद्र / Baltic Sea, Andaman Sea, Caribbean Sea, Dead Sea". This question's original explanation was written against an earlier, since-corrected answer-key reading and has been cleared pending a verified rewrite, rather than leaving it arguing for the wrong option.

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