Every living thing in the planet lives on the Earth’s crust, which is the outermost layer. It can vary, in terms of depth, between 5 and 75 km. It is composed of silicates, mostly, with a large amount of oxygen mixed in. As a matter of fact, 47% of the crust is made up of oxygen.
http://planetfacts.org/what-is-earth-made-of/
Answer 2: It may be made of a mixture of other magnetic metals however there are several reasons to believe that the core is made of predominantly iron. First, iron is one of the most abundant elements on Earth. Secondly, asteroids are composed predominantly of iron.
http://scienceline.ucsb.edu/getkey.php?key=3318
Scientists believe that this core is comprised mostly of iron, around 80% of it, which were pulled together and into the planet’s middle during it’s formation about 4.5 billion years ago. The earth is a lot more than what our eyes can see and is truly a spectacular, curious thing.
http://planetfacts.org/what-is-earth-made-of/
The Earth's outer core is most likely made up of an iron-nickel alloy while the inner core mostly iron and a bit of nickel and cobalt. This is due to inferences that iron, cobalt and nickel are denser than other materials found at different levels in the structure of Earth, such as magnesium in the mantle. The outer core is made up of liquid iron and nickel, along with lighter elements such as sulfur and oxygen. The inner core is made up of solid nickel and iron, and contains heavy and radioactive elements as well. There are two parts to the Earth's core: the inner and outer core.
http://www.answers.com/Q/What_is_the_Earth's_core_made_up_of
Because of the temperature difference between the Earth’s surface and outer core, there is a convective material circulation in the mantle. This consists of the slow, creeping motion of the Earth’s silicate mantle across the surface, carrying heat from the interior of the Earth to the surface.
https://www.universetoday.com/40229/what-is-the-earths-mantle-made-of/
The outer core is about 1,400 miles thick, and it's made mostly of a combination (called an alloy) of iron and nickel, along with small amounts of other dense elements like gold, platinum, and uranium. These metals can, of course, be found on the surface of Earth in solid form. In the outer core, they're in a very hot liquid form.
http://wonderopolis.org/wonder/what-is-earths-core-made-of/
Now this does not entirely rule out different elements in the core. There may be other trace (small) amounts of other elements. However from what we see in asteroid composition, gravity of Earth, and how energy (seismic) waves travel through the core we have reason to infer the core is made predominantly of iron.
http://scienceline.ucsb.edu/getkey.php?key=3318
Existing theory states The field exists because Earth has a giant ball of iron at its core surrounded by an outer layer of molten metal.. EVERYTHING heavier than, and including iron is at the core! Iron 7.874. Gadolinium 7.895. Terbium 8.229. Dysprosium 8.55. Niobium 8.570.
http://www.answers.com/Q/What_elements_is_the_earth%27s_core_made_up_of
Over the past two centuries, we have gained a much better understanding of the atomic elements and how they have formed. One of the things we have learned is that we—and every other living thing on Earth—are made up mostly of four elements. These four atomic elements are oxygen, carbon, hydrogen, and nitrogen. Together they make up about 96% of our bodies, as you can see in the figure.
https://briankoberlein.com/2014/04/18/four-elements/
This Is a Certified Answer. Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest. This is because iron is a very dense element.
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what core element is earth mostly made of
The core element of earth mostly made is most likely made up of an iron-nickel alloy while the inner core mostly iron and a bit of nickel and cobalt. The Earth's outer core is mostly made up of an iron-nickel alloy and the inner core is mostly made up of iron.