What's Happening in Erie County. 1  September 1 - September 30 : Agricultural Districts Open Enrollment Period. 2  September 4 : Erie County Government offices are closed today. 3  September 5 : Justice Assistance Grant (JAG) Public Notification - Fiscal Year 2017.
Definition. 1  As a noun, the common definition of chemical is a substance that is produced or used in a process (reaction) involving changes to atoms or molecules. 2  As an adjective, chemical means of or pertaining to chemistry.
An organic chemical is any molecule with at least one carbon atom forming its base, and a few examples of organic molecules include living matter such as the DNA of plants and animals, nonliving naturally occuring matter such as methane, fossil fuels and diamonds, and man-made materials such as carbon fiber.