The Earth's Inner Core
is at the very center of the earth
is the element that makes up most of the Earth's inner core
The earth is approximately how old?
5 billion years
are caused by plate movement
Picture of the earth's core
is made up mostly of rock
The center of the earth
is about 4000 miles below the surface
Earth's outer core
is made of liquid metal
study earth's structure and development
is the most massive planet
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