INDIAN GEOGRAPHY

THE EARTH

INTERNAL STRUCTURE OF EARTH

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Temperature of core could be:
A
4000
B
5000
C
6000
D
None of these
Explanation: 

Detailed explanation-1: -The “popular” estimates range from about 4, 000 kelvins up to over 7, 000 kelvins (about 7, 000 to 12, 000 degrees F). If we knew the melting temperature of iron very precisely at high pressure, we could pin down the temperature of the Earth’s core more precisely, because it is largely made up of molten iron.

Detailed explanation-2: -The Upper Mantle is much stronger than the asthenosphere at about 500-900°C, and the Lower Mantle is denser and hotter, reaching temperatures over 4, 000°C.

Detailed explanation-3: -Inner Core The inner core is a hot, dense ball of (mostly) iron. It has a radius of about 1, 220 kilometers (758 miles). Temperature in the inner core is about 5, 200° Celsius (9, 392° Fahrenheit). The pressure is nearly 3.6 million atmosphere (atm).

Detailed explanation-4: -Lower Mantle: The lower mantle lies between 660-2, 891 km (410-1, 796 miles) in depth. Temperatures in this region of the planet can reach over 4, 000 °C (7, 230 °F) at the boundary with the core, vastly exceeding the melting points of mantle rocks.

Detailed explanation-5: -Above the inner core is the outer core, a shell of liquid iron. This layer is cooler but still very hot, perhaps 7, 200 to 9, 000 degrees Fahrenheit (4, 000 to 5, 000 degrees Celsius).

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