The inner core; outer core; mantle; and crust
the core is the most dense because it has all the other layers pushing on it.
A Different Answer:
Scientifically, the Lithosphere is the least dense because it has no pressure from other layers against it. It is the crust and the upper mantle.
The Asthenosphere is known as the "weak sphere" and it is under the Lithosphere which has more density from the pressure.
The Mesosphere is the middle sphere. It is the stronger lower mantle. It is under the Asthenosphere and the Lithosphere. It has even more density.
Under that is the outer core, which is liquid iron and it is 2,200 Km thick (very, very thick).
Lastly there is the inner core, which is the most dense of all with all of the other layers pressing against it!
If you want to make all of the info I have listed easier/simpler here it is:
The crust, the mantle (67% of Earth's mass) and the core, made mostly of iron and other dense materials.
The layers of the sun, from the center outward, are the core, the radiative zone, the convective zone, the photosphere, the chromosphere, and the corona.
Most do not. Stars about 10 times more massive than the sun or larger will explode. Smaller stars shed their outer layers gradually.
The three layers of the Sun's atmosphere are the photosphere, the chromosphere, and the corona. The photosphere is the visible surface where sunspots are found. The chromosphere is a thin layer above the photosphere where solar flares occur. The corona is the outermost layer of the Sun's atmosphere, extending millions of kilometers into space.
The process that carries the Sun's energy to its surface involves two main stages: radiative transfer and convective transport. In the core, nuclear fusion generates energy, which is absorbed and re-emitted by particles in a dense, radiative zone, taking millions of years to reach the outer layers. Once in the convective zone, energy is transported more rapidly through convection currents, where hot plasma rises to the surface, cools, and sinks, eventually reaching the photosphere, from which sunlight is emitted.
tropic of cancer
300
photosphere
The Photosphere
Chromosphere and corona
The photosphere
Sunspots
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The corona, the suns atmosphere.
Fart
Chromosphere A + LS.
The layers of the sun, from the center outward, are the core, the radiative zone, the convective zone, the photosphere, the chromosphere, and the corona.
"The core is made of hot, dense gas in the plasmic state"