THE EARTH
INTERNAL STRUCTURE OF EARTH
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Density
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Molten form
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Great weight & pressure
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Heat & Weight
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Detailed explanation-1: -The outer core, about 2, 200 kilometers (1, 367 miles) thick, is mostly composed of liquid iron and nickel. The NiFe alloy of the outer core is very hot, between 4, 500° and 5, 500° Celsius (8, 132° and 9, 932° Fahrenheit).
Detailed explanation-2: -The outer core is not under enough pressure to be solid, so it is liquid even though it has a composition similar to that of the inner core. Sulfur and oxygen could also be present in the outer core.
Detailed explanation-3: -Although having a composition similar to Earth’s solid inner core, the outer core remains liquid as there is not enough pressure to keep it in a solid state.
Detailed explanation-4: -The outer core is the third layer of the Earth. It is the only liquid layer, and is mainly made up of the metals iron and nickel, as well as small amounts of other substances. The outer core is responsible for Earth’s magnetic field. As Earth spins on its axis, the iron inside the liquid outer core moves around.