Publishing as Benjamin Cummings. 3. A pure substance is classified as. â¢ matter with a specific and constant composition. â¢ an element when composed of one type of atom. â¢ a compound when composed of two or more. elements combined in a definite ratio. Pure Substances.
Hudson is a city in Lenawee County in the U.S. state of Michigan. The population was 2,307 at the 2010 census.
The Hudson River National Estuarine Research Reserve network recently added Haverstraw Bay County Park as a case study site for their Sustainable Shorelines Project. Take a look at the case study report here: Haverstraw Bay Park Case Study.