the outer core
only liquid layer of the earth
If there were such a thing it would not be soft, it would be liquid, and would be called magma. There really is no completely molten layer of Earth except for the outer core which is composed primarily of liquid iron along with some nickel and other trace elements.
The Earth's liquid layers are (working outward from the core):The outer core (Molten iron and nickel)The mantel (A layer of hot rocks with the consistency of asphalt which flows)The hydrosphere (oceans)The atmosphere
The outer core.
The Earth's outer core is a layer of liquid metal.
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."
mantle, core, outer core, or crust
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 Earth's crust
The hydrosphere is the layer of Earth composed of water.
The outer core is the only layer with molten in it.
The outer core is a liquid that is in between the inner core and mantle. It is 2,000km thick.