Why is it hard to study the formation of earth
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The Earth has a layered structure made up of the core, mantle and crust. The crust and upper part of the mantle is broken into large pieces called tectonic plates. These move slowly over the mantle.
Volcanoes occur when molten rock pushes up through weaknesses in the crust. The molten rock cools and solidifies to form igneous rock
The Earth is almost a sphere. These are its main layers, starting with the outermost:
crust - relatively thin and rockymantle - has the properties of a solid, but can flow very slowlyouter core - made from liquid nickel and ironinner core - made from solid nickel and iron.
Cross section showing structure of the Earth
The radius of the core is just over half the radius of the Earth. The core itself consists of a solid inner core and a liquid outer core. It is difficult to study the structure of the Earth because:
the crust is too thick to drill all the way throughscientists need to study seismic waves made by earthquakes or man-made explosions
Volcanoes occur when molten rock pushes up through weaknesses in the crust. The molten rock cools and solidifies to form igneous rock
The Earth is almost a sphere. These are its main layers, starting with the outermost:
crust - relatively thin and rockymantle - has the properties of a solid, but can flow very slowlyouter core - made from liquid nickel and ironinner core - made from solid nickel and iron.
Cross section showing structure of the Earth
The radius of the core is just over half the radius of the Earth. The core itself consists of a solid inner core and a liquid outer core. It is difficult to study the structure of the Earth because:
the crust is too thick to drill all the way throughscientists need to study seismic waves made by earthquakes or man-made explosions
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It is difficult to study the structure of the Earth because the crust is too thick to drill all the way through. scientists need to study seismic waves made by earthquakes or man-made explosions
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