Difference between revisions of "Air"
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== Description == | == Description == | ||
| − | The common name for the natural mixture of gases surrounding the earth. Air, or atmosphere, predominately contains [ | + | The common name for the natural mixture of gases surrounding the earth. Air, or atmosphere, predominately contains [[nitrogen|nitrogen]] (75-78 %) and [[oxygen|oxygen]] (21-23 %). Trace levels of other gases ([[argon|argon]], [[carbon%20dioxide|carbon dioxide]], [[neon|neon]], [[helium|helium]], [[methane|methane]], etc.) are also present along with varying amounts of water vapor. The index of refraction of air is 1.0003. Air is the primary source for the manufacture of pure gases (oxygen, nitrogen, etc.). It is also used as a coolant, as a blowing agent, and as a filler in flotation devices. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| Line 7: | Line 7: | ||
Luft (Deut.); air (Fr.); ar (Port.) | Luft (Deut.); air (Fr.); ar (Port.) | ||
| + | == Risks == | ||
| + | |||
| + | Noncombustible; but necessary for combustion. | ||
| + | |||
| + | == Physical and Chemical Properties == | ||
{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | -216.2 to -191.3 | + | | -216.2 to -191.3 C |
|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 1.00 | + | | 1.00 g/ml |
|- | |- | ||
! scope="row"| Refractive Index | ! scope="row"| Refractive Index | ||
| Line 19: | Line 24: | ||
|- | |- | ||
! scope="row"| Boiling Point | ! scope="row"| Boiling Point | ||
| − | | -194.3 | + | | -194.3 C |
|} | |} | ||
| − | == | + | ==Resources and Citations== |
| − | |||
| − | |||
| − | |||
| − | |||
* ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998 | * ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998 | ||
| Line 36: | Line 37: | ||
* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000 | * Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000 | ||
| − | * Wikipedia | + | * Wikipedia: http://en.wikipedia.org/wiki/Air (Accessed Mar. 1, 2006) |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Latest revision as of 14:47, 24 April 2022
Description
The common name for the natural mixture of gases surrounding the earth. Air, or atmosphere, predominately contains Nitrogen (75-78 %) and Oxygen (21-23 %). Trace levels of other gases (Argon, Carbon dioxide, Neon, Helium, Methane, etc.) are also present along with varying amounts of water vapor. The index of refraction of air is 1.0003. Air is the primary source for the manufacture of pure gases (oxygen, nitrogen, etc.). It is also used as a coolant, as a blowing agent, and as a filler in flotation devices.
Synonyms and Related Terms
Luft (Deut.); air (Fr.); ar (Port.)
Risks
Noncombustible; but necessary for combustion.
Physical and Chemical Properties
| Melting Point | -216.2 to -191.3 C |
|---|---|
| Density | 1.00 g/ml |
| Refractive Index | 1.0003 |
| Boiling Point | -194.3 C |
Resources and Citations
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
- Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
- Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000
- Wikipedia: http://en.wikipedia.org/wiki/Air (Accessed Mar. 1, 2006)