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Seafloor Spreading Theory- Indian Geography MCQs | UPSC IAS Exam

Seafloor Spreading Theory- Indian Geography MCQs | UPSC IAS Exam

Seafloor Spreading Theory- Indian Geography MCQs | UPSC IAS Exam   Q1. Consider the following statements/निम्नलिखित कथनों पर विचार करें
  1. The Continental shelf is the extended margin of each continent occupied by relatively shallow seas and gulfs/महाद्वीपीय मग्नतट प्रत्येक महाद्वीप का बढ़ा हुआ भाग होता है जो उथले सागर तथा खाड़ियों द्वारा घिरा होता है  |
  2. Continental margin include continental shelf, continental slope, continental rise and deep-oceanic trenches/महाद्वीपीय सीमा में महाद्वीपीय मग्नतट,महाद्वीपीय ढाल ,महाद्वीपीय उभार और गहरी महासागरीय खाइयाँ आदि शामिल है |
  3. The Continental rise connects the continental shelf and the ocean basins./महाद्वीपीय उभार महाद्वीपीय मग्नतट महासागरीय बेसिन को जोड़ता है |
Which of the above statement/s is/are correct/इनमे से कौन सा कथन सही है –
  • Only 3
  • 1 and 2  
  • 2 and 3
  • 1,2,3
[showhide type=”links1″ more_text=”Show Answer” less_text=”Hide Answer”] Ans. B is correct.
  • Statement 1 is correct The continental shelf is the extended margin of each continent occupied by relatively shallow seas and gulfs.
  • Statement 2 is correct Continental margin include continental shelf, continental slope, continental rise and deep-oceanic trenches.
  • Statement 3 is not correct The continental slope connects the continental shelf and the ocean basins.
[/showhide] Q2. Consider the following statements/निम्नलिखित कथनों पर विचार करें
  1. The depth of the continental slope region varies between 200 and 3,000 m. /महाद्वीपीय ढाल क्षेत्र की गहराई 200 से 3000 मीटर के बीच है |
  2. Continental floor is always heavier than Oceanic floor so continental floor gets subducted./महाद्वीपीय अधस्तल सर्वदा महासागरीय अधस्तल से भारी  होता है एवं नष्ट हो जाता है |
  3. The continental shelf ends at a very steep slope, called the shelf break./मग्नतट अत्यंत तीव्र ढाल पर समाप्त होता है इन्हे  शेल्फ ब्रेक कहा जाता है
Which of the above statement/s is/are correct/इनमे से कौन सा कथन सही है
  • Only 1
  • 1 and 2
  • 1 and 3
  • 1,2,3
[showhide type=”links2″ more_text=”Show Answer” less_text=”Hide Answer”] Ans. C is correct.
  • Statement 1 is correct The depth of the continental slope region varies between 200 and 3,000 m.
  • Statement 2 is not correct Oceanic floor is always heavier than Continental floor so oceanic floor gets subducted.
  • Statement 3 is correct The continental shelf ends at a very steep slope, called the shelf break.
[/showhide] Q3. Consider the following statements/निम्नलिखित कथनों पर विचार करें
  1. The gradient of the continental slope region varies between 2-5°/ढाल वाले प्रदेश की प्रवणता 2 से 5 डिग्री के बीच होती है |
  2. Mariana Trench is the deepest part of the world’s oceans./मारियाना गर्त दुनिया के महासागरों का सबसे गहरा भाग है |
  3. Deep sea plains are covered with fine-grained sediments like clay and silt./गंभीर सागरीय मैदान महीन कणों वाले अवसादों जैसे मृतिका  एवं गाद से ढके होते है |
Which of the above statement/s is/are correct/उपरोक्त में से कौन सा कथन सही है
  • Only 1
  • 1 and 2  
  • 2 and 3
  • 1,2,3
[showhide type=”links3″ more_text=”Show Answer” less_text=”Hide Answer”] Ans. D is correct.
  • Statement 1 is correct The gradient of the continental slope region varies between 2-5°.  
  • Statement 2 is correct Mariana Trench is the deepest part of the world’s oceans.It is located in the western Pacific Ocean, an average of 200 kilometres to the east of the Mariana Islands, in the Western Pacific East of Philippines.
  • Statement 3 is correct  Deep sea plains are covered with fine-grained sediments like clay and silt.
[/showhide] Q4. Consider the following statements/निम्नलिखित कथनों पर विचार करें :
  1. Mid oceanic ridge, as the name suggests, always pass through middle of ocean./मध्य महासागरीय कटक , जैसा की नाम से पता चलता है की यह महासागर के मध्य से गुजरता है
  2. A mid-oceanic ridge is composed of two chains of mountains separated by a large depression/मध्य महासागरीय कटक दो पर्वतीय  श्रृंखला से बना है जो एक विशाल अवनमन द्वारा अलग किये गए होते हैं |
  3. The rim of the Pacific is also called ring of fire due to the existence of active volcanoes in this area./प्रशांत महासागर के किनारों को सक्रीय ज्वालामुखी के क्षेत्र होने के कारण “रिंग ऑफ़ फायर ” कहा जाता है |
Which of the above statement/s is/are correct ?/उपरोक्त में  से कौन सा कथन सत्य है
  • Only 1
  • 2 and 3  
  • Only 2
  • 1,2,3
[showhide type=”links4″ more_text=”Show Answer” less_text=”Hide Answer”] Ans. B is correct.
  • Statement 1 is not correct Mid Oceanic ridge does not always pass through middle of ocean like in Pacific ocean and Indian ocean.
  • Statement 2 is correctA mid-oceanic ridge is composed of two chains of mountains separated by a large depression.
  •  Statement 3 is correct The rim of the Pacific is also called ring of fire due to the existence of active volcanoes in this area.
[/showhide] Q5. Consider the following statements/निम्नलिखित कथनों पर विचार करें
  1. Wherever falling limbs of ocean currents meet, oceanic ridges are formed on the seafloor./जहां कहीं भी इन धाराओं के ऊपर उठते हुए भाग  मिलते हैं, समुद्री कटकों का निर्माण समुद्र के तल पर होता है
  2. Paleomagnetism is the study of the record of the Earth’s magnetic field in rocks, sediment etc./ पुराचुम्बकत्व चट्टानों और अवसादों के भीतर  पृथ्वी के चुंबकीय क्षेत्र के लेखा-जोखा का अध्ययन है |
  3. Paleomagnetic studies of rocks and ocean sediment have demonstrated that the orientation of the earth’s magnetic field has never alternated over geologic time./चट्टानों तथा महासागरीय अवसादों के पुराचुम्बकत्व  अध्ययन ने यह प्रमाणित किया की भू-वैज्ञानिक समय के साथ पृथ्वी  के चुंबकीय क्षेत्र ने बार बार परीवर्तन नहीं किया है |
Which of the above statement/s is/are correct/उपरोक्त में से कौन सा कथन सही है ?
  • Only 1
  • 1 and 3  
  • Only 2
  • 1,2,3
[showhide type=”links5″ more_text=”Show Answer” less_text=”Hide Answer”] Ans. C is correct.
  • Statement 1 is not correct Wherever rising limbs of these currents meet, oceanic ridges are formed on the seafloor and wherever the failing limbs meet, trenches are formed.
  • Statement 2 is correct Paleomagnetism is the study of the record of the Earth’s magnetic field in rocks, sediment etc.
  • Statement 3 is not correct Paleomagnetic studies of rocks and ocean sediment have demonstrated that the orientation of the earth’s magnetic field has frequently alternated over geologic time.
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