Answer:
because they consider the the difference of chemical components
Scientists divide Earth's core into outer and inner core because ; ( A ) They exist in different states of matter
The inner core of the earth is very hot and is composed mainly of Iron, it is as big as the size of the moon and is solid in nature. while the outer core which is liquid in nature is composed of iron and nickel and surrounds the Earth's inner core, acting as a boundary between the inner core the Earth's mantle.
Therefore the main reason why scientists divide the Earth core into outer and inner core is due to the difference in state of the inner and outer earth core, and not its chemical composition because they both contain Iron.
Hence we can conclude that Scientists divide Earth's core into outer and inner core because, They exist in different states of matter.
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