How much if the temperature in the center of earth?

Question

If no body has ever reached there, then how come we could get an accurate answer !!

Answer 1

It is approximately 4000°C at the centre of the Earth. To put this in context:

The centre of the Sun is approximately 15 million°C
The surface of the Sun is 5500°C
Iron melts at 1535°C (when at atmospheric pressure)
Water boils at 100°C (when at atmospheric pressure)
Human skin is comfortable with temperatures up to about 60°C
The highest temperature recorded on the Earth's surface is 58°C (Libya 1922)
It is not possible to directly measure the temperature at the centre of the Earth and four thousand degrees is nothing more than our most well-established piece of guesswork to date. Most modern calculations rely on the fact that we believe the inner core to be made up of iron and nickel that is just about at melting point. It is under a lot of pressure, which prevents it from melting, even at such high temperatures. There is also a lot of evidence regarding how the outer core of the Earth convects and that helps to establish the temperature. However, recently British scientists have suggested that the temperature of the Earth's core may in fact be as high as the surface of the Sun, so the question is still open.

http://www.physlink.com/Education/AskExperts/ae621.cfm

answer 2)
There is no way to measure the temperature at the Earth's core
directly. We know from mines and drill holes that, near
the surface of the Earth, the temperature increases by about
1 degree Fahrenheit for every 60 feet in depth. If this
temperature increase continued to the center of the Earth, the
Earth's core would be 100,000 degrees Celsius!

But nobody believes the Earth is that hot; the temperature increase
must slow down with depth and the core is probably
about 3000 to 5000 degrees Celsius.

This estimate of the temperature is derived from theoretical
modeling and laboratory experiments. This work is very
difficult (and speculative) since nobody can reproduce
in a laboratory the high temperatures and pressures that
exist in the core. Also it is not known exactly what
the core is made of.

http://www.newton.dep.anl.gov/askasci/gen99/gen99256.htm

answer by: FARES AL-SAGRI

Answer 2

There is no way to measure the temperature at the Earth's core
directly. We know from mines and drill holes that, near
the surface of the Earth, the temperature increases by about
1 degree Fahrenheit for every 60 feet in depth. If this
temperature increase continued to the center of the Earth, the
Earth's core would be 100,000 degrees Celsius!

But nobody believes the Earth is that hot; the temperature increase
must slow down with depth and the core is probably
about 3000 to 5000 degrees Celsius.

This estimate of the temperature is derived from theoretical
modeling and laboratory experiments. This work is very
difficult (and speculative) since nobody can reproduce
in a laboratory the high temperatures and pressures that
exist in the core. Also it is not known exactly what
the core is made of.

Answer 3

The Science channel just had a program about the beginning of our solar system. Can't remember how the sun began but 4 of the largest planets began from magnetic fields circurling around the sun. as the sun kept haveing volcanic eruptions, 4 large pieces got caught in the magnetic fields. these pieces were pieces of iron, more and more smaller pieces kept attaching to the large pieces every time they circled the sun. It was soooo hot that these small pieces kept melting, the iron would run to the center and the lighter stuff would stay to the outside. So they said the center of the earth is made of molten Iron. Our moon is actually a piece of earth, which was knocked of by a meteor during the big BOOM. Which may have caused the earth to tilt on its axis, which causes our seasons. They never said the exact temp of the earths core. Infa-red shows different colors for different temps. I guess they figure that if earth originated from the sun, then the temp. of the core of earth is the same as the surface of the SUN.

Answer 4

Earth's core temperature is about 6,000° C. By coincidence, this is about the same as the Sun's surface temperature (but much cooler than the Sun's core temperature, which is about 15,600,000° C). The Earth's core is cooling, but at a very slow rate. Over the past three billion years it has probably cooled by a few hundred degrees. Currently, the Earth's core temperature is not changing much because, through radioactive decay (nuclear fission - the breakup of the nuclei of heavy elements, like uranium), it is generating about as much heat as it is losing.

Answer 5

It is about 7000degC.No one can ever reach there. We compute these values by studying data geological activities such as Earth Quakes, Volcanoes etc.

Answer 6

Those are separate questions. One question per person. No answer for you.