how does the earth`s core remain liquid after millions of years have passed?

Question

is it through the rotation or neuclear fusion? do any other planets have a liquid centre as well as earth?

Answer 1

The Earth's core stays liqiud becuase of the presure of all the rock aroud it. Gravity adds into this also for with out it the rock would float away. so becuase of the two put together the core stays in it's liqiud form.

to the second part of your question : ye shtere are othe planets that have a molten core in fact most of the planets in our solar system have molten cores.

I hope this is the answer you were looking for .

Answer 2

The core remains liquid because of the intense heat inside the planet. This heat is primarily leftover from the formation of the planet, and is held in by the outer crust. But a certain amount of friction due to the pressure, plus the decay of radioactive elements, contributes to the heat as well.

Note that the inner core, despite being hottest of all, remains solid due to the incredible pressure at the center of the planet.

EDITED TO ADD: Despite what a few other posters have claimed, pressure does NOT cause a solid to become liquid. It's the other way around.

Answer 3

The Victorian scientist Lord Kelvin had a problem with this too, because he calculated that for the core to still be molten from the heat of formation of the planet, it could not be more than about 100 million years old, which was less than a tenth of the time geologists said was needed to lay down all the layers of rock they could identify.

It is the continued decay of the long-lived heavy radioactive isotopes in the core that maintain its heat. This is nuclear fission, not nuclear fusion which is how the Sun creates its heat.

Answer 4

The heat under the Earth's crust keeps the particles in a liquid form resulting in a liquid mantle, and outer core but the inner core is solid and very very dense because of the huge amount of pressure put on it forcing it to take a solid structure. The only planets I know of which also have molten cores are mercury, venus has a partly molten core, and mars.

Answer 5

Mass extinctions caused by a collision of a gigantic comet hitting the earth -- last one created the gulf of Mexico. Direct Quotation: "Computer modeling of asteroid impacts and climatic effects suggest that this devastating sequence of events could happen. Fortunately it is extremely unlikely that this scenario will occur in our time. No known asteroids are on a collision course with Earth. However, every 50 to 100 million years the Earth collides with a comet or asteroid of sufficient size to cause planet-wide devastation. "

Answer 6

The liquid drop called earth solidified and the crust that formed is providing insulation for the molten core inside.

Yes, there could be other planets with molten core.

Answer 7

The Earth contains a fair few radioactive elements, and it is their decay over billions of years that has kept the interior hot and molten. Heat by radioactive decay has been used in power sources for remote space probes. IMagine it on a planetary scale.

Answer 8

the pressure exerted by the upper layers of the earth on the core is so enormous that it cannot volatilize even though it is so hot.as you know the closer you go towards the center,the greater will be the pressure and larger the pressure,the more the molecules are condensed into their most compact state.at one point the pressure is so large it causes the formation of a dense,hot solid core which is what we call the inner core.

Answer 9

Only the outer core is liquid but the inner core is super dense and can only be liquid if the temperatures became as high as no one can imagine