Skin
The outer layer of the tooth is enamel.
The outer layer is atmosphere.
The epidermis is the outer layer of skin. The dermis is beneath the epidermis.
The epidermis is the outer layer of skin. The dermis is beneath the epidermis.
The outer layer of the sun is called the corona.
The stratum corneum is the tough outer layer of the skin.
Mercury's outer layer is solid rock like the rest of it
There is no specific term for the outer layer of a volcano.
A thin rocky outer layer is known as the: Crust
The outer layer of blastula is always known as ectoderm.
The mantle is the layer above the outer core.
cell membrane