What type of change is indicated when a new substance is formed from altering the composition of a substance?

The formation of a new substance through the alteration of the composition of a substance is referred to as a chemical change. In a chemical change, the molecules of the original substances rearrange to form new molecules, resulting in products that are chemically different from the reactants. This process often involves the breaking and forming of chemical bonds, as well as changes in energy, which are not characteristics of physical changes.

Physical changes, in contrast, involve changes in physical properties such as shape, size, or state of matter, but do not alter the chemical composition of the substance. Biological changes typically refer to processes related to living organisms and may involve biochemical transformations, but they do not specifically describe the change of a substance's composition. Mechanical changes pertain to physical alterations resulting from forces and do not involve chemical reactions or the formation of new substances.

Recognizing that a chemical change specifically involves the creation of new substances helps in understanding the broader principles of chemistry and material science, which are essential in various fields, including funeral service education. Understanding the difference between these changes is crucial for handling substances safely and appropriately.