Science glossary This blog will be related to my program : Science. This Science glossary will focus on the three main branches: chemistry, biology, and physics. Its purpose is to help students like me or people interested in this field of study to remind them of some of the words presented in the first year of the program and to teach them the meaning of these words often used. acceleration noun The rate of change of velocity per unit of time. Example: This is the centripetal ACCELERATION, component for point C with respect to A in the open configuration. en: accéléation Your browser does not support the audio element. atom noun The basic building block of matter, representing the smallest unit of a chemical element. Example: In 1913 Niels Bohr released his initial model of the ATOM, as time has passed numerous flaws have arisen in this model. en: atome ...