A geophysicist may say that the earth has only one layer which is liquid, the outer core. However a hydrologist may also include the hydrosphere, although whether this can truly be considered a layer of the earth is debatable.
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The upper mantle, the lower mantle and outer core. Elements of the atmosphere are also liquid, but the atmosphere is comprised primarily of gases. Only the crust and inner core are solid.
The Liquid Outer Core.
There is no layer of Earth that is predominantly molten rock. The only layer of Earth that is liquid is the outer core, however this is mainly iron and nickel. The mantle, the thickest layer of the Earth, contains rock that is "ductile" (i.e. very viscous and able to flow very slowly), but not technically "liquid."
The Outer Core.
soler system
Outer core.