Describe theories or models for the nature of matter and/or energy at the level of atoms and molecules that explains observations in the macroscale world related to the nature of matter and/or energy in bulk.

provide an answer the following prompt:

Given what you have learned in this course, describe as specifically as you can your understanding of an example from among the theories or models for the nature of matter and/or energy at the level of atoms and molecules that explains observations in the macroscale world related to the nature of matter and/or energy in bulk.