UNIVERSE
PLANETARY INTERIORS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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silicon and iron
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silicon and oxygen
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iron and lead
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iron and nickel
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Detailed explanation-1: -The inner core is believed to be composed of an iron–nickel alloy with some other elements. The temperature at the inner core’s surface is estimated to be approximately 5, 700 K (5, 430 °C; 9, 800 °F), which is about the temperature at the surface of the Sun.
Detailed explanation-2: -Outer core (2900 km-5000 km below the Earth’s surface). 30 % of the Earth’s total mass. Inner core (5000 km-6370 km below the Earth’s surface).
Detailed explanation-3: -The boundary between the inner and outer core, which occurs at a depth of roughly 5, 100 km (about 3, 200 miles), is known as the Lehmann discontinuity. Lehmann is also known for researching Earth’s mantle.
Detailed explanation-4: -Inner core An extremely hot, solid sphere of mostly iron and nickel at the center of the earth. It is 3, 200 to 3, 960 miles (5, 150 to 6, 378 km) below the surface and about 750 miles (1, 200 km) in diameter.