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Earth seems to be the correct size to enable a slowly cooling environment for the interior of the planet. Smaller planets cool much more quickly. Earth's solid inner core is gradually growing larger, however, and will someday completely solidify.
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Why do other terrestrial planets have little or no magnetic field?
The core is molten iron (magnetic) and is constantly moving. This moving iron is creating a magnetic field. Some planets don't have molten cores, therefore don't produce this. This process was also kickstarted by the suns solar flares.
What other planets are likely to have visable northern lights?
Only planets that have an active iron core. Only planets with a magnetic field
Is the planet Mercury core mostly made of metal?
Yes. Mercury's core is molten metal. SPECIFICALLY: Mercury has a large iron core which is partially molten and generates a magnetic field about 1% as strong as that of Earth's. Mercury's interior appears to resemble that of the Earth. Both planets have a rocky layer called a mantle beneath their crust and both planets have an iron core. http://www.aerospaceguide.net/planet/planetmercury.html this link will take you to an excellent website on more about Mercury. Also it has links to other planets if you would like to know more about those too.
Is mantle made of molten metal?
No. Only the outer core is molten.
Does the earth have large molten core?
Earth has a two-part core. The outer portion is molten while the inner portion is solid.
What is the heart of the planet called?
The core. The heart of the planet is called the core, Earth's core is molten while some other planets have solid cores.
Why is the interior of the earth and other inner planets hot?
Inner part of planet contains molten magma or core. Its hot due to intense pressure.
Why do other terrestrial planets have little or no magnetic field?
The core is molten iron (magnetic) and is constantly moving. This moving iron is creating a magnetic field. Some planets don't have molten cores, therefore don't produce this. This process was also kickstarted by the suns solar flares.
What is inside of all of the planets?
Different for each planet. Earth has a core of molten iron and rock. The Moon appears to be solid to the core, having cooled a long time ago. Venus is probably still molten at the core; heck the SURFACE is nearly molten. Mars is smaller and further away, so may have a small molten core or may be solid iron and rock. The gas giant planets may have small rocky cores, or may be gasses compressed to metallic solids by the immense pressure. We will have to do more studies to find out.
What are other facts about the outer core?
it is molten rock
Is the core of the earth molten?
Part of it is. The outer core is molten while the inner core is solid.
Why is the Earth's outer core molten while other planets have solid cores or do they?
Earth seems to be the correct size to enable a slowly cooling environment for the interior of the planet. Smaller planets cool much more quickly. Earth's solid inner core is gradually growing larger, however, and will someday completely solidify.
What sort of surfaces do the inner planets have?
The inner, or terrestrial planets are more dense than the outer planets/gas giants/jovian planets. Through a process of differentiation we find inner planets to typically consist of a molten iron core and a less dense silicate crust.
What layer of earth is made up of hot molten rocks?
The outer core is the only molten layer of the Earth. == ==
Do earthquakes occur on other planets?
Usually, no. Earth is the only planet to have a molten core, which means it's Tectonic plates have something to 'Float' on and move around on. On Mars for example, the core is solid, and there are no tectonic plates, which means earthquakes aren't possible.
How does radioactivity affect the planet?
Among other things, it keeps the core hot (and molten).
Is molten iron and nickel in the outer core spinning?
Yes! The molten iron and nickel in the outer core is spinning.
