Science & Tech: Silicon identified as ‘missing element’ in Earth’s core

KPSC KAS IAS Coaching State Updates National

  • Silicon likely makes up a significant proportion of the Earth’s core after iron and nickel, say scientists who claim to have identified the ‘missing element’ in the deep interiors of our planet that has eluded us for decades.
  • The discovery could help us to better understand how our world formed, researchers said.
  • For the study, researchers from Tohoku University in Japan recreated the high temperatures and pressures found in the deep interior of the Earth.
  • The Earth consists of four general sections, the outermost being the crust (that’s where we live). Below that is the mantle, which makes up the bulk of Earth’s volume.
  • The core is around 2,200 miles in diameter, but it is usually separated into the outer and inner core. It’s the inner core is 760 miles in diameter, and it is this region that is of particular interest to scientists.
  • While it’s incredibly hot at more than 5,400 degrees Celsius, the pressure from all the layers pushing down on it make it a solid ball.
  • The outer core is a highly viscous fluid. We know the inner core is mostly composed of nickel and iron in a 10-85% split. It’s that missing 5% that is the topic of research in the study from Tohoku University.
  • Since we cannot examine the core of the Earth directly, the best way to study it is to monitor how seismic waves pass through this region. In order to assess different elements as components of the core, the Tohoku University team basically created a scale model of it in the laboratory.
  • They used samples of nickel and iron and mixed in silicon.
  • The resulting alloy was subjected to high temperature and pressure like it would experience in the inner core. The behavior of this alloy was a good match for the seismic data acquired from observing the Earth’s core.
  • It is mainly composed of iron, which makes up about 85 per cent of its weight and nickel, which accounts for about 10 per cent of the core.
  • To study the unaccounted five per cent of the core, researchers created alloys of iron and nickel and mixed them with silicon, ‘BBC News’ reported. They then subjected them to the immense pressures and temperatures that exist in the inner core.
  • They discovered that this mixture matched what was seen in the Earth’s interior with seismic data.
Related Posts
Researchers have identified a brain region that links anxious temperament to low social status. In the study, researchers performed a series of experiments on rats to identify the brain areas involved ...
Get ready for the Budget 2018
Expected big news - Budget expected to focus on direct taxes While there are unlikely to be any major changes in indirect tax as most of them are now under the ...
“14th ಏಪ್ರಿಲ್  2018 ಕನ್ನಡ ಪ್ರಚಲಿತ ವಿದ್ಯಮಾನ”
ಚುನಾವಣೆ ಕುರಿತ ಗೀತೆ ಬಿಡುಗಡೆ ಮತದಾನದ ಕುರಿತು ಜನ ಜಾಗೃತಿ ಮೂಡಿಸಲು ಸಿದ್ಧಪಡಿಸಿರುವ ಕರ್ನಾಟಕ ಚುನಾವಣಾ ಗೀತೆಯನ್ನು ಮುಖ್ಯ ಚುನಾವಣಾಧಿಕಾರಿ ಸಂಜೀವ್​ಕುಮಾರ್ ಬಿಡುಗಡೆ ಮಾಡಿದರು. ರಾಜ್ಯದಲ್ಲ ಮೊಟ್ಟಮೊದಲ ಬಾರಿಗೆ ಚುನಾವಣೆಗೆಂದೆ ಗೀತೆ ರೂಪಿಸಲಾಗಿದೆ. ಈ ಗೀತೆ ಮತದಾನದ ಅರಿವು ಮೂಡಿಸಲು ಜನಸಮುದಾಯವನ್ನು ಮುಟ್ಟಲಿದೆ. ಈ ಗೀತೆ ...
ರೈತರ ಕೃಷಿ ಉತ್ಪನ್ನಗಳನ್ನು ಪಟ್ಟಣದ ಮಾರುಕಟ್ಟೆಗೆ ಸುರಕ್ಷಿತವಾಗಿ ಸಾಗಿಸುವುದಕ್ಕೆ ಮತ್ತು ಗ್ರಾಮೀಣ ಪ್ರದೇಶದ ಜನರಿಗೂ ಉತ್ತಮ ಸಂಪರ್ಕ ರಸ್ತೆ ಅನುಕೂಲ ಕಲ್ಪಿಸುವ ಯೋಜನೆ. ರಸ್ತೆ ನಿರ್ಮಾಣಗೊಂಡ ನಂತರದ ಐದು ವರ್ಷಗಳವರೆಗೆ ಗುತ್ತಿಗೆದಾರರೇ ನಿರ್ವಹಣೆ ಮಾಡಬೇಕು, ಆರನೇ ವರ್ಷ ಮತ್ತೆ ಮರುಡಾಂಬರಿಕರಣಗೊಳಿಸಿ ಸರ್ಕಾರಕ್ಕೆ ಹಸ್ತಾಂತರಿಸುವುದು ಯೋಜನೆಯಲ್ಲಿರುವ ...
Karnataka Current Affairs – KAS/KPSC Exams – 17th Nov 2017
Council passes Road Safety Authority Bill The Karnataka State Road Safety Authority Bill, 2017, which seeks to curb accidents by making roads safer was passed in the Council on 16th Nov. The ...
The IS claims to be more than a militant group, selling itself as a government for the world’s Muslims that provides a range of services in the territory it controls. The ...
IMD urges govt to encourage farmers to register on portal
The officials of the India Meteorological Department (IMD) on Tuesday met the state government officials and urged them to speed up the process of making farmers register on M-Kisan portal. Union ...
Karnataka Current Affairs – KAS/KPSC Exams – 20th & 21st September 2017
Karnataka: Status report sought on illegal slaughterhouses The High Court on 20th Sep directed the State police to submit a status report on steps taken to identify illegal slaughterhouses and close them ...
Karnataka Current Affairs- KAS/KPSC Exams- 17th Oct 2017
Schools to be penalised if they fail to implement Kannada phase-wise Students from other States who enrol in schools in Karnataka between classes two and eight will have to study class ...
Karnataka Current Affairs – KAS/KPSC Exams – 15th April 2018
KLS GIT students win hackathon event Three teams of students from KLS Gogte Institute of Technology have won the first round of the “Smart India Hackathon-18”. The three teams comprised Kartik Kumar ...
Anxiety is related to social status
Get ready for the Budget 2018
“14th ಏಪ್ರಿಲ್ 2018 ಕನ್ನಡ ಪ್ರಚಲಿತ ವಿದ್ಯಮಾನ”
‘ನಮ್ಮ ಗ್ರಾಮ ನಮ್ಮ ರಸ್ತೆ’
Karnataka Current Affairs – KAS/KPSC Exams – 17th
Islamic State losing support
IMD urges govt to encourage farmers to register
Karnataka Current Affairs – KAS/KPSC Exams – 20th
Karnataka Current Affairs- KAS/KPSC Exams- 17th Oct 2017
Karnataka Current Affairs – KAS/KPSC Exams – 15th