How many layers does the earth have?

The Earth consists of four layers: crust, mantle, outer core and inner core. Each layer has its own properties and characteristics that separates it from the other layers. The crust, also known as the lithosphere, is the top layer and is made up of rock material. read more

That adds up to either 9 or 10 or 11 "layers" if you ignore the fact that that the crust has numerous layers. , and I @ Ocean, sea creatures, boats, sand @haven't mentioned all the layers the oceans and seas have. read more

Earth's mantle extends to a depth of 2,890 km, making it the thickest layer of Earth. The mantle is divided into upper and lower mantle. The upper and lower mantle are separated by the transition zone. read more