Noun
(physics) The layer of molecules at the surface of a liquid that is responsible for surface tension
(ecology) The layer of surface water that forms a boundary between sea and air
Source: en.wiktionary.orgThe removal of an electron from the surface of an atom - that is, the ionization of the atom - means a fundamental structural change in its surface layer. Johannes Stark
After sufficient time, humus moves downward and is deposited in a distinctive organic surface layer called the A horizon. Source: Internet
As the Earth spins eastward beneath the moon, the moon's gravity ever so slightly pulls the Earth's surface layer back westward, just as proposed by Alfred Wegener (see above). Source: Internet
In the north the surface layer (down to 15 m) may heat up to 18–20 °C. Source: Internet
Consequently, the thin optical surface layer could be quite different from the regolith underneath, and not representative of the bulk composition of the body. Source: Internet
In the central and western part of the island is the Troodos Massif, a mountain range whose surface layer is mostly basaltic lava rock, and whose maximum elevation is convert. Source: Internet