ch2o – Project Haystack

def

ch2o

Formaldehyde (CH₂O)

meta

supertypes

marker

Marker labels a dict with typing information

    phenomenon

Aspect of scientific interest with measurable quantities

        substance

Matter in one the three states solid, liquid, or gas

            fluid

Liquid or gas

                gas

Substance with neither definite volume nor shape

quantities

concentration

Abundance of substance in the total volume of a mixture

flow

Measure of volumetric flow of fluid

level

Range from 0% to 100%

pressure

Measure of force applied

temp

Temperature - measure of hot and cold

volume

Three dimensional space occupied by a substance