Chemistry (5245) Praxis Practice Questions and Answers

phase change The term phase transition is most commonly used to describe transitions between solid, liquid and gaseous states of matter, and, in rare cases, plasma Gas gas is one of the four fundamental states of matter Energy transformation energy transformation or energy conversion is the process of changing one form of energy to another form of energy Physical properties A physical property is any property that is measurable, whose value describes a state of a physical system Element In mathematics, an element, or member, of a set is any one of the distinct objects that make up that set Work In physics, a force is said to do work if, when acting there is a displacement of the point of application in the direction of the force mixture In chemistry, a mixture is a material system made up of two or more different substances which are mixed but are not combined chemically chemical bonds A chemical bond is a lasting attraction between atoms that enables the formation of chemical compounds fission In nuclear physics and nuclear chemistry, nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts heat In physics, heat is energy that spontaneously passes between a system and its surroundings in some way other than through work or the transfer of matter system A system is a set of interacting or interdependent component parts forming a complex/intricate whole Thermal energy In thermodynamics, thermal energy refers to the internal energy present in a system due to its temperature