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How many planets have inner and outer cores?

All terrestrial planets, such as Earth, Mercury, Venus, and Mars, have inner and outer cores. These cores are composed of mostly iron and nickel, with the inner core being solid and the outer core in a liquid state. Gas giant planets like Jupiter and Saturn also have cores, but they lack a distinct separation into inner and outer regions like terrestrial planets.


The surfaces of the inner planets are mostly made of?

The surfaces of the inner planets (Mercury, Venus, Earth, Mars) are mostly made of solid rock. This rock is composed of silicate minerals like feldspar, pyroxene, and olivine. Some planets like Venus and Earth also have significant amounts of metal elements like iron and nickel in their cores.


What two metal are in the inner and outer core?

Iron and nickel compose the bulk of the inner and outer core of the Earth.The bulk of the inner and outer cores, around 80%, are composed of iron. A substantial amount, around 10%, is composed of nickel, and the remainder is a mixture of other elements.


How are the compositions of the inner and outer planets different?

A basic, simplified answer is: The inner planets are mainly rock with iron cores. The outer planets are mostly gas, or liquefied gases.


What is the inner core of the earths composed of?

An alloy of solid nickel and iron, mostly.


What is the inner core of the earth is composed of?

An alloy of solid nickel and iron, mostly.


What is the difference between the inner cores and outer cores?

The inner core is a solid, and the outer core is a liquid.


How are the compositions of the inner planets and outer planets different?

A basic, simplified answer is: The inner planets are mainly rock with iron cores. The outer planets are mostly gas, or liquefied gases.


Why are inner planets composed mostly of rock and metal?

The inner planets at made out of rocks because of the sun and the falling rocks.


Of what substance are the inner planets mostly composed of?

The inner planets, including Mercury, Venus, Earth, and Mars, are composed mostly of rock and metal. They have solid surfaces and relatively high densities compared to the outer gas giants.


Define inner planets?

Every inner planet has a core. The cores of Mercury, Venus, and Earth are composed of iron-nickel. Mars's core is made of liquid iron sulfide mixed with some nickel.


What is inner cores thickness?

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