Why has the center of the earth, after all this time, still not solidified?
959085
the rotation of the earth and the semisic activity
145985
the world is roughly spherical, (a ball) and the reason for this is because something as big as earth pulls itself toogether so that everything falls to the center of the sphere, if there were a substantially eneven spot on the earth (let's say a huge spike 40 miles high) it would most likely fall down into place. I magine a bunch of rocks that are pulling themselves together one rock sticks to the other you have two rocks keep on going now you have three so on and so on. If you take a bunch of weird shape magnets they'll stick together in the shape of a ball because they'll all want to be as close as possible and the only way to do that is a sphere since every point in the surface to the center will give you the same distance. Same as if you pushed clay from every side with equal force it'd form a ball.\n\nDUDE!!! PICK A BEST ANSWER!!!!
821321
All the mass on the earth is being pulled in by gravity, you and me included. the more mass you have the more an object pulls towards itself and others (basically heavy things have a sort of pull, so when you are by a huge mountain you are actually being pulled towards it) \n\nThe easiest way of all the mass to be pulled together is in a sphere, there are no corners and its cannot be compressed without other areas moving further away from the centre, so theoreticlaly the earth SHOULD be a sphere\n\nBUT it isn't; due to its rotation it is fatter than it is tall, because of mass being moved out by centrifugal force. \n\nhope this helps
184304
The 2nd answer is the more popular belief, keep in mind these are just theros, as no one to this day has been to the center of the earth.  So fear not, you can dig that hole in your back yard without fear of falling thru.
220230
You wouldn't. It would melt as it neared the center of the Earth. Assuming you are asking the hypothetical question, it would go to the middle of the earth and stay there...that is where gravity pulls from.
465388
The Earth is round for the same reason that things don't fall off it.  Gravity is a force in the universe that attracts all forms of matter equally, this means that pieces of matter will eventually move together and form clumps, if this is happening from every direction then the most likely shape it will form is a sphere.\n\nThis gravitational attraction is pretty small.  However, the Earth is pretty big, so the combined effect of all that gravity is just enough to keep your feet firmly planted on the surface :)\n\nThere are a few other related effects that come into play, such as centrifugal force, which keeps everything spinning and moving.
883188
The theory that the world was once ice that you are talking about is called snow ball earth. Off the top of my head i can not remember the names of the scientists that came up with the theory. The claimed that they found evidence of rocks deformed by ice in Africa (near the equator). Which was not disbuted. The problem is that once the earth was covered in ice how did it melt? There are several theories to this but i dont really believe them. One is that volcanics in areas of weak ice erupted masses of co2 which allowed for thew atmosphere to rapidly (a few hundred thousand years). But on the other hand the solar radiation (i.e heat) would have been reflected by the ice. For more informatio look it up on ther web. \n\nIn the earths history there have been  many phases of glacial (cold) and interglacial periods so what you are saying is theoretically correct. However there is undisbuted evidence that we have accelarated the proccess of global warming. Naturally these cycles of heating and cooling take thousands of years but we have seen increases of 1-2 degrees in a few decades which, according to records is unprecedented.
427427
There is no populated geographic center of the Earth.  The center of the Earth is many miles underground and obviously not occupied.  \nIf you mean, which country is at the center of the surface of the Earth, there's no answer to that either, because the Earth is a sphere, and there are no edges from which to measure a center.
619711
The earth (and its chemical reactions) wasn't born until about 8 billion years after the Big Bang ... things had slowed down a bit by then.
9991
To a first-order approximation the Earth is round.  This\nis due to gravity.  Gravity pulls with equal strength in all\ndirections; therefore any variations from a spherical\nshape will lead to gravitational forces that\nbring the shape back into that of a sphere.\n \nThis is without considering the rotation of the earth,\nhowever.  The rotation of the earth adds centrifugal\neffects, which cause the earth to bulge slightly at\nits equator and flatten slightly at its poles.\n(This is like twirling a rock on the end of a string\nand then letting go--the rock flies away from the\ntwirler.)  Because of these centrifugal effects, the\ndistance from the center of the earth to the surface\nof the earth is about 0.33% shorter at the poles\ncompared to the equator.
768674
Two reports that may be new evidence.  Gathered in the\n   flight of the Ark around the entire system.  The one point is\n   it is not hot as we know of hot.  That would be igneous and\n   would react through tunneling into the surface.  The center\n    is a similar but cold material, sort of the co2 type of material.\n    Like hot it is outside of our ability to touch, without data our\n    mind cannot concept it and we could hurt our nerves.  The\n    nearby area is also unknown, that is the radiant, reactives,\n    radiological materials that are emitted into space pass through\n    nearly every material without any noticeable change.  This\n    unknown is called the central web iron.  That material is also\n    undefined because there are no samples on the surface to\n    see, or measure.  The general core is magnesium sulfates\n    these have the properties that make the planet warm, sweet,\n    and vegetative.
1150478
It's widely believed in the scientific community that the earth has a liquid mantle (that's where magma/lava comes from) and a solid super-hot iron core.  Good luck digging through that.
64853
First of all the world is not round it is an oblique sphereoid (basically a double ended pear shape.)\n\nThe force of gravity generated by the molten core of the planet acts in all directions equally at any one point in the planet.  This attracted the material from space that formed earth following the Big Bang.  This would form a spherical object.\n\nThe rotation of the planet complicates thia as the equator is rotating faster than parts of the Earth that are further away from the equator, the poles rotate the slowest.  This disparity causes greater centripidal forces to be experienced at the equator than at the poles so the earth bulges out at the centre.
314986
To a first-order approximation the Earth is round. This\nis due to gravity. Gravity pulls with equal strength in all\ndirections; therefore any variations from a spherical\nshape will lead to gravitational forces that\nbring the shape back into that of a sphere.\n\nThis is without considering the rotation of the earth,\nhowever. The rotation of the earth adds centrifugal\neffects, which cause the earth to bulge slightly at\nits equator and flatten slightly at its poles.\n(This is like twirling a rock on the end of a string\nand then letting go--the rock flies away from the\ntwirler.) Because of these centrifugal effects, the\ndistance from the center of the earth to the surface\nof the earth is about 0.33% shorter at the poles\ncompared to the equator.
328636
In essence eveything's floating as the earth's core is liquid.\n\nThe earth's surface is made up of a series of tectonic plates which float about and bump into each other (earthquakes).  Where these plates meet each other are what are known as fault lines, the San Andreas Fault being one such.  The Asian tsunami was the result of two such plates that had been pushing into each other for many years until the force between them was so great that one plate sprung upwards like a giant spring.\n\nOver millions of years these plates have moved huge distances and continents have drifted apart or been pushed together.  If you look at maps showing the world as it would have been say 1 million years ago it's very different to how it is now.  Likewise, in another million years it will be very different from the world as we know it.
1037575
The Earth is about 12,750 kilometers (km) in diameter.\n\nHere are some answers to some more of your questions:\n\nHow old is the earth?\nThe earth is about 4.5 billion years old. That is 45,000,000,000 years. The sun, the moon, the planets, and nearly everything in our solar system was formed at the same time, so they are all 4.5 billion years old. \nHow does the earth spin?\nIf you look around at planets, stars, and galaxies in the universe you will see that EVERYTHING spins! This is because planets like Earth (and stars and galaxies) formed from a large cloud of gas and dust. As gravity pulled the cloud together, any little bit of spin gets multiplied. This is known to scientists as the Conservation of Angular Momentum. You can try this out yourself. Find a chair that spins easily and sit on it. Start out by spinning with your arms outstretched, then pull them in to your body. Did you notice that the chair started to spin faster when you pulled your arms in? The same thing happens as the planet forms — as its gas, dust, and rocks fall together the planet spins up faster and faster. Later other things can affect the spin. Earth and the moon pull on each other, affecting both their spins and the orbit of the moon. It's quite a dance! \n\nHow fast is the earth spinning and why can't we feel it spin?\nThe circumference of (distance around) the earth is 2 x PI x radius, which turns out to be about 24,000 miles. Since the earth turns once per day (or 24 hours), that is 1,000 miles per hour! We don't feel that because everything else is moving with us and because the motion is very, very smooth. It's kind of like sitting in a car and reading a book or playing a game. If the car is going very smoothly, with no stops or bumps, and you don't look out the window, you wouldn't know you were moving. The only reason we know the earth is turning is because the sun and stars move across the sky. \n\nWhat is the exact tilt of the earth? How much does it change throughout the year?\nThe tilt of the earth is 23.45 degrees. This is measured as the tilt of the earth's equator compared to its orbit around the sun. The amount of the tilt doesn't change with time, but the direction that the earth's poles are pointed does. This is called precession. It is just like the wobbling of a spinning top. The direction that the North Pole (and South Pole) is pointed moves in a circle in the sky very slowly, completing each circle once every 26,000 years. \n\nWhy does only Earth have so much oxygen?\nThat's a very good question — no other planet in the solar system has so much oxygen. The answer is — life! Earth did not originally have a lot of free oxygen in the atmosphere. The oxygen was mostly combined with other elements to make carbon dioxide, water, or in rocks. But as early life evolved, especially plants, well they give off oxygen. So the reason we have so much oxygen in our atmosphere — and we are here and can breathe it! — is due to plant life on the earth! \n\nHow can rockets get through the earth's atmosphere, but comets can't?\nObjects hitting our atmosphere usually burn up because they are hitting it so fast. Usually they are moving at hundreds or thousands of miles per second. Rockets and the shuttle move more slowly (although pretty fast compared to cars on the highway). Here's a comparison. If you jump into a swimming pool from the high board and hit the water really hard, it stings and you make a big splash. But if you step into the water slowly, it feels fine and you make only a little ripple. The same thing happens to meteors — they hit the earth's atmosphere real hard and go splat! \n\nIf a comet hit the earth, what would happen?\nIt could cause a big explosion. The nucleus of a comet is thought to be a mile or two in size. The nucleus is made up of ice and rock, but we aren't sure how solid it is. Something that big hitting the earth from space would be bigger than
1137090
Here is something for you to ponder.....\nScientists claim that the earth is millions of years old. They make this claim by studying the layers of the earth (example: The Grand Canyon) If you look at the walls of the grand canyon, you can see many different layers of sediment on the walls of the canyon. The heavier and most dense rocks and solid formations are near the bottom of the canyon itself. The softer, less dense earth materials are nearer to the top of the canyon. Now...they claim this took millions or billions of years to happen.\nHere is a simple experiement to prove that theory wrong. Take a large jar or clear glass container and fill it with water (simulating the great flood of Noahs time) next fill it with sand, rocks, dirt and other earthly materials of your own choice....shake it all up to make a nice mixture. Within mere minutes you will see that the heavier earthly materials like the rocks and clay will sink to the bottom and the softer less dense materials will remain at the top and all of this will occur within minutes, not years. To me, this simple experiemnt is proof that the earth is not billions of years old and that the great flood that God put on this earth happend only a few thousand years ago, just around the time Jesus walked the earth! Think about it! I personally do believe there is a God, but I believe that scientists are wrong when they contemplate the earths age and structure, God does exist, in what form I do not know, but he does exist in some way and I get the feeling he is pissed off at most of us...So have faith my friend....Scientists are not always right by any means, God walked the earth only a few thousand years ago....not billions like scientists claim.