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https://www.dkfindout.com/us/earth/structure-earth/inner-core/

Find out more about the Earth's inner core. Get information about the inner core layer and discover interesting facts for kids with DK Find Out.

https://sciencing.com/5-earths-inner-core-13761.html

Apr 20, 2018 ... The planet Earth consists of a series of distinct layers, each of which has a unique structure. The inner core of the Earth has a number of ...

http://www.softschools.com/facts/geology/inner_core_facts/2207/

Earth's innermost section is called its inner core, and is believed to be just as hot as the sun's surface. It was once believed that the earth's inner core was liquid, ...

https://www.nationalgeographic.org/encyclopedia/core/

Aug 17, 2015 ... Another key element in Earth's core is sulfur—in fact 90% of the ... Temperature in the inner core is about 5,200° Celsius (9,392° Fahrenheit).

https://en.wikipedia.org/wiki/Earth%27s_inner_core

Earth's inner core is the innermost geologic layer of the Earth. It is primarily a solid ball with a ... He started from the known fact that the Moon and Sun cause tides in the liquid outer core, just as they do on the oceans on the surface.

https://www.universetoday.com/26710/earths-inner-core/

Mar 9, 2009 ... But the fact that the Earth had two cores, inner and outer, was first discovered in 1936 by seismologist Inge Lehmann. He observed that seismic ...

https://study.com/academy/lesson/earths-inner-core-lesson-for-kids-definition-facts.html

The inner core is located at the very center of the Earth. We can't travel there, so most of what we know about the core is based on scientists'...

http://gamediv1.weebly.com/inner-core.html

The Inner Core is the final layer of the Earth. ... You can also learn how hot the Inner Core is, how thick it is and some interesting facts about the Inner Core.

https://www.nationalgeographic.com/science/earth/surface-of-the-earth/earths-interior/

Jan 5, 2020 ... Learn about the layers inside the Earth, inaccessible to humans. ... Above the inner core is the outer core, a shell of liquid iron. This layer is ...

https://www.discovermagazine.com/the-sciences/20-things-you-didnt-know-about-inner-earth

Dec 10, 2012 ... One theory: The inner core consists of metallic crystals aligned with Earth's poles, and the waves move more rapidly when they go with the ...