UPSC GEOGRAPHY

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50+ Prelims Score Boosting Tricks (English Medium)

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■ SOURCES OF EARTH’S HEAT [PART 2] #interiorofearth 2. Primordial heat ◇ Heat left over from Earth's formation known as the primordial heat. ◇ Primordial heat is the kinetic energy transferred to Earth by external impacts of comets and meteorites and the subsequent effects (friction caused by sinking of heavy elements like Fe, rising light elements like Si) and latent heat of crystallisation released as the core solidified. ▪︎@upsc_geography_notes

बिना यह देखे Prelims देने मत जाना.. 50+ Prelims Score Boosting Tricks (Hinglish Medium | हिंदी माध्यम) Video हटने से पहले जल्दी से Save & Share कर लेना 👍

50+ Prelims Score Boosting Tricks (English Medium)

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■ SOURCES OF INFORMATION ABOUT THE INTERIOR. [ PART 2] #interiorofearth INDIRECT SOURCES. □ Seismic waves ◇ They are the most important source available to understand the layered structure of the earth. ◇ The velocity of seismic waves changes as they travel through materials with different elasticity and density. □ Meteorites ◇ Meteorites and Earth are born from the same nebular cloud. Thus, they are likely to have a similar internal structure. □ Gravitation ◇ The gravitation force (g) is not the same at different latitudes on the surface. It is greater near the poles and less at the equator. ◇ This is because of the distance from the centre at the equator being greater than that at the poles. ◇ The gravity values also differ according to the mass of material. □ Magnetic field ◇ The geodynamo effect helps scientists understand what's happening inside the Earth's core. ◇ Shifts in the magnetic field also provide clues to the inaccessible iron core. ▪︎@upsc_geography_notes

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