Indications of a Chemical Change. 1  Evolving bubbles or releasing gas. 2  Absorbing or releasing heat. 3  Changing color. 4  Releasing an odor. 5  Inability to reverse the change. 6  Precipitation of a solid from a liquid solution. 7  Formation of a new chemical species. This is the best and surest indicator.
Definition of packaging. 1 : an act or instance of packaging something or someone: such asa : the enclosing of something in a container or covering â¦ damage caused by static charge during packaging, storing, and shipping.
CORE CURRICULUM. All packaging majors must complete a core curriculum consisting of eight packaging courses which accounts for 32 of the 120 credits required for the degree, and includes more than 100 hours of practical laboratory experience. Core courses include studies in the following areas: 1  Technical principles for packaging. 2  Materials (glass, plastic, paper and metals in packaging). 3  Computer applications. 4  Packaging processes & systems. 5  Distribution dynamics.