What is the earth's only liquid layer?

It is only 4 to 6 miles (7 to 10 km) thick and usually younger than continental crust. This layer of the earth lies between the mantle and the solid inner core. It is the only liquid layer, a sea of mostly iron and nickel about 1,400 miles (2,300 km) thick. read more

The only liquid layer of the earth is the outer core. The inner core is solid because of the intense pressure from the other layers, and the other layers are made of igneous rock. However, the inner and outer core have the same composition: iron and nickel. read more

The only liquid layer of Earth is the outer core, composed of liquid iron and nickel. Deep in the Earth's interior is an iron and nickel core. The center of that core is solid, but there is a layer a thousand miles or more think that is liquid. read more

It is the only liquid layer, a sea of mostly iron and nickel about 1,400 miles (2,300 km) thick. Pangaea The name given to the supercontinent that existed more than 225 million years ago, in which the present-day continents were joined together in one large landmass. read more