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