Surface
A surface is the outer part of something. Most surfaces have a width and a length, but no depth.[1]
Examples of Surfaces
- An apple has a skin on its surface.
- People live on the Earth's surface.
- A piece of metal is put in red paint. The metal is taken out of the paint. After, the outside of the piece of metal is red. The parts of the metal that are now red are called the surface of the object.
- Boats move on the surface of the sea.
- Small insects can walk on the surface of the water, because of surface tension.
Surface Media
The surface of an apple has various perceptible characteristics, such as curvature, smoothness, texture, color, and shininess; observing these characteristics by sight or touch allows the object to be identified.
Water droplet lying on a damask. Surface tension is high enough to prevent floating below the textile.
The Sun, like all stars, appears from a distance to have a distinct surface, but on closer approach has no set surface.
Notes
- ↑ Another way to say this is "Most surfaces are two-dimensional. The two dimensions are width and length."
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