That red hen is a good layer.2. A visible stratum or the overlapping of materials: At the point where the road was cut, Randy could see the layer of sandstone between the layers of soft clay.
The lair of the foxes was lined with several different materials; the last layer was soft and comfortable for the new fox cubs.
2. The thin layer of air adjacent to the earth's surface, usually considered to be less than 300 feet (91 meters) high.
3. The thin layer of air adjacent to the earth's surface, extending up to the so-called anemometer level (the base of the Ekman layer [thin top layer of the sea]); within this layer the wind distribution is determined largely by the vertical temperature gradient and the nature and contours of the underlying surface, and shearing stresses are approximately constant.
2. One of several strata or layers of the earth's atmosphere.
Temperature distribution is the most common criterion used for denoting the various shells.
It is made up of ions of one charge type which are fixed to the surface of the solid and an equal number of mobile ions of the opposite charge which are distributed through the neighboring region of the liquid.2. The area of a charge separation formed when an electrode meets an ionic conductor.
A metal electrode in a water solution forms a specific structure consisting of the metal surface itself, an adjoining layer of adsorbed (adhesion to the surfaces of solids) water molecules and ions, and an outer region of oppositely charged ions diffused in the liquid.
This causes an electric field of considerable intensity.3. An interfacial region, near the boundary between two different phases of a substance, in which physical properties change significantly.
4. A structure that appears on the surface of a charged object when it is placed into a liquid.
This object might be a solid particle, a gas bubble, a liquid droplet, or a porous body.
The hot plastic asthenosphere, part upper mantle and lower crust about 186 miles (300 kilometers) thick, separates the more brittle crust-mantle lithosphere above from the mesosphere below.
This is thought to be responsible for the movement of the lithospheric plates (crustal plates) which slowly "carry" the continents around the planet.
The more solid mesosphere, which is located below he asthenosphere, includes part of the upper and all of the lower mantle.
2. The nuclear zone of the developing neural tube between the marginal layer and the ependymal layer (covering of internal and external surfaces of the body, including the lining of vessels and other small cavities); which forms the gray matter of the central nervous system.
2. The layer of the upper atmosphere, from 15 to 50 kilometers (10 to 30 miles) above the earth's surface, where most atmospheric ozone collects, absorbing harmful ultraviolet radiation from the sun.
In the 1980's it was realized that industrial pollutants such as CFC's were damaging the ozone layer and that holes had appeared in it, especially over the Antarctic.
CFC refers to a gas containing carbon, hydrogen, chlorine, and fluorine; some forms of which are said to damage the ozone layer in the earth's atmosphere.
This layer is reasonably homogenous in terms of its temperature, salinity, and nutrient concentrations; this is also the layer where most primary production occurs.
2. Negative semiconductor material in which there are more electrons than holes; current is carried through it by the flow of electrons.
Its height is variable and ranges from 100 to 3,000 meters.