def
gas
Substance with neither definite volume nor shape
meta
supertypes
marker |
Marker labels a dict with typing information |
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phenomenon |
Aspect of scientific interest with measurable quantities |
substance |
Matter in one the three states solid, liquid, or gas |
fluid |
Liquid or gas |
subtypes
air |
The mixture of gases which surrounds the earth |
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ch2o |
Formaldehyde (CH₂O) |
ch4 |
Methane (CH₄) |
co |
Carbon monoxide (CO) |
co2 |
Carbon dioxide (CO₂) |
hfc |
Hydrofluorocarbons |
n2o |
Nitrous oxide (N₂O) |
naturalGas |
Fossil fuel energy source consisting largely of methane and other hydrocarbons |
nf3 |
Nitrogen trifluoride (NF₃) |
nh3 |
Ammonia (NH₃) |
no2 |
Nitrogen dioxide (NO₂) |
o2 |
Oxygen (O₂) - the common dioxygen allotrope in the air |
o3 |
Ozone (O₃) |
pfc |
Perfluorocarbons |
propane |
By-product of natural gas processing and petroleum refining (C₃H₈) |
sf6 |
Sulphur hexafluoride (SF₆) |
steam |
Water in its gas form |
tvoc |
Total volatile organic compound (TVOC) |