The inner core of the Earth is composed primarily of iron and nickel and is extremely hot (estimated to be between 5,200°C and 6,000°C). While this temperature is well above the melting point of these metals at standard atmospheric pressure, the immense pressure at the Earth's core (estimated to be millions of times atmospheric pressure) significantly raises their melting point. At this extreme pressure, the material remains solid despite the high temperature.
Despite intense heat in the core of the Earth, how can its central part can stay in solid form ?
Asked in GPSC Prelims CSP 2 2017 · Topic: The Earth (Interior of the Earth: Crust, Mantle, Core)
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Answer: A. Due to the intense pressure on the central part, its boiling point is high
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