I can improve my school community by helping out more. I can stay after class to tidy up classrooms. Help students who need the extra help. I can sharpen pencils after class. I can donate extra school supplies for the kids that don’t have.
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. ... As an adjective, "chemical" means "of or pertaining to chemistry". Chemistry is the study of matter and its transformations.
A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds.
The definition of a chemical is a substance created by chemistry. An example of chemical is a pesticide. noun. Of or relating to chemistry. adjective.
Examples of chemicals include the chemical elements, such as zinc, helium, and oxygen; compounds made from elements including water, carbon dioxide, and salt; and more complex materials like your computer, air, rain, a chicken, a car, etc.
