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Sigma KEE - EarthsAtmosphere
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EarthsAtmosphere
EarthsAtmosphere is the layer of gases, a mixture of mainly oxygen and nitrogen, surrounding PlanetEarth. See also Air.
Relationships      
InstancesAtmosphereAtmosphere is a Mixture of gases surrounding any celestial object that has a gravitational field strong enough to prevent the gases from escaping.
 EntityThe universal class of individuals. This is the root node of the ontology.
 ObjectCorresponds roughly to the class of ordinary objects. Examples include normal physical objects, geographical regions, and locations of Processes, the complement of Objects in the Physical class. In a 4D ontology, an Object is something whose spatiotemporal extent is thought of as dividing into spatial parts roughly parallel to the time-axis.
 PhysicalAn entity that has a location in space-time. Note that locations are themselves understood to have a location in space-time.
 RegionA topographic location. Regions encompass surfaces of Objects, imaginary places, and GeographicAreas. Note that a Region is the only kind of Object which can be located at itself. Note too that Region is not a subclass of SelfConnectedObject, because some Regions, e.g. archipelagos, have parts which are not connected with one another.
Belongs to Class Entity


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