(9) Physical Properties Polycyclic organic matter is made up of chemicals that are formed during the incomplete burning of coal, gas, wood, or other organic substances.
(9) Physical Properties Polycyclic organic matter; is made up; ) (chemicals; are formed; T:during the incomplete burning of coal, gas, wood, or other organic substances)
9) Physical Properties Polycyclic organic matter chemicals
is made up are formed
T:during the incomplete burning of coal, gas, wood, or other organic substances