the core is made from iron.
the earths core is the hottest part of the earth. the metals in the earths outer core is liquid because of the heat and the metals in the earths core is solid but still the earths core is the hottest
Geologists are interested in the history of the earth because they want to know how the world became what it is today. Geologists study the history of earth because it's a thing they've grown to like and are in to. History is a major part of earth and the way of life, someone has to know the statsitics.
We know the discontinuity exists because of different types of seismic waves; certain waves can penertrate to different depths. Seismic waves are refracted at the Gutenburg discontinuity, which marks the upper boundary of the earth's core
No one is exactly sure how dense the core of the earth is. All we know is that the core is solid of an unknown density probably the density of a hard rock, and is denser than water for sure.ans2. Studies of the behaviour of seismic waves have given us some ideas about the inner core. It is probably a nickel-iron mixture, with other heavy metal contamination. The heat due to radioactive decay has raised the temperature to 5700 deg C, but it is solid because of the pressure. Some of the temperature is due to gravitational pressure.The inner core possibly rotates slightly faster then the lithosphere, though opinion is not agreed on this.
Contrary to common belief, we cannot be certain of the composition of the Core of our planet because we do not have samples of it. We base our assumption on evidence elsewhere:The Earth's electromagnetic field implies that there is Iron in the Core.Ironic Meteorites from space have a composition of Nickel and Iron. They have the same density as the Core. We therefore say that at the formation of the Earth, such meteorites were accumulated to form the core of the planet.Alternatively, the core could be composed of radioactive elements, which is what supplies the Earth with a constant energy supply. This is shaky however, as it leaves much unexplained. Until there is concrete evidence from below the earth's surface, we cannot know for sure, but for all intents and purposes, yes, it is.
Seismology - echo patterns of sound waves traveling through the earth.
Because of the difference/wavering in the earths magnetic field due to thwe fact the inner core is largely Iron....
I don' t know
because the core is 3,000 kilometers thick!
While pure iron is unlikely is it thought that as much as 35% of the Earths total mass is made of a Nickel/Iron Alloy. The vast majority of this alloy is present within the Mantle and Core of the planet.
1.because earth acts like a bar magnet and we had imagined that there is a magnet in earths core
Although we can not see them, we know from certain meteorites (Nickel/Iron meteorites) and from the density measurements of the rocks we see at the Earth's surface compared to the mass of the whole planet that the two most abundant elements in the Earth's core must be Iron and Nickel. Iron being the predominant of the two.
the earths core is the hottest part of the earth. the metals in the earths outer core is liquid because of the heat and the metals in the earths core is solid but still the earths core is the hottest
Volcanoes allow the molten lava from the outer core to pass through weak spots in the mantle.
The inner core of Earth contains Iron and Nickel. I do not know the percentages of each gas.
Geologists need to know about physics, chemistry, biology and maths.
solid is better as it has no voids that force the lines of flux around them. in AC powered electromagnets, the core is laminated of many thin layers of iron to prevent formation of eddy currents which waste power and cause heating of the core.