INDIAN GEOGRAPHY

THE EARTH

INTERNAL STRUCTURE OF EARTH

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Radius of solid inner core is _________ miles.
A
740
B
750
C
760
D
770
Explanation: 

Detailed explanation-1: -One layer, the Earth’s core, is the innermost area of the planet and mainly a solid ball with a radius of about 760 miles. It is believed to consist primarily of iron-nickel alloy and to be the same temperature as the surface of the sun.

Detailed explanation-2: -Inner Core The inner core is a hot, dense ball of (mostly) iron. It has a radius of about 1, 220 kilometers (758 miles).

Detailed explanation-3: -Earth’s innermost layer is the core, which is separated into a liquid outer core and a solid inner core. The outer core is 2, 300 kilometers (1, 429 miles) thick, while the inner core is 1, 200 kilometers (746 miles) thick.

Detailed explanation-4: -Inside the Earth The deepest layer is a solid iron ball, about 1, 500 miles (2, 400 kilometers) in diameter. Although this inner core is white hot, the pressure is so high the iron cannot melt. The iron isn’t pure-scientists believe it contains sulfur and nickel, plus smaller amounts of other elements.

Detailed explanation-5: -The Earth is formed of the crust, the mantle and the inner and outer cores. The solid inner core is situated about 3, 200 miles below the Earth’s crust and is separated from the semi-solid mantle by the liquid outer core, which allows the inner core to rotate at a different speed from the rotation of the Earth itself.

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