Structure and properties of matter vocabulary

Term Definition
Thermal energy Thermal energy is the internal energy of an object due to the kinetic energy of its atoms and/or molecules.
Solid firm and stable in shape; not liquid or fluid.
Liquid having a consistency like that of water or oil, i.e., flowing freely but of constant volume.
Gas an air like fluid substance which expands freely to fill any space available, irrespective of its quantity.
Plasma a fourth state of matter distinct from solid or liquid or gas and present in stars and fusion reactors; a gas becomes a plasma when it is heated until the atoms lose all their electrons, leaving a highly electrified collection of nuclei and free electrons
Colloid a homogeneous, noncrystalline substance consisting of large molecules or ultra-microscopic particles of one substance dispersed through a second substance. Colloids include gels, sols, and emulsions; .
Phase change The states in which matter can exist: as a solid, liquid, or gas. When temperature changes, matter can undergo a phase change, shifting from one form to another.
Particle a tiny or very small bit:
Melting point the temperature at which a solid substance melts or fuses.
Freezing point the temperature at which a liquid freezes:
The freezing point of water is 32°F, 0°C.
Boiling point the temperature at which the vapor pressure of a liquid is equal to the pressure of the atmosphere on the liquid, equal to 212°F (100°C) for water at sea level.
Evaporation the act or process of evaporating. liquid to gas
Condensation the state of being condensed.
Volume the amount of space, measured in cubic units, that an object or substance occupies.
Mass the quantity of matter as determined from its weight or from Newton's second law of motion.
Density the state or quality of being dense; compactness; closely set or crowded condition.
Pure substance A material that is composed of only one type of particle; examples of a pure substance include gold, oxygen and water.
Atom the smallest component of an element
Molecule the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound.
Element the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound.
Compound a pure substance composed of two or more elements whose composition is constant.
Extended structure
Physical change a usually reversible change in the physical properties of a substance, as size or shape
Chemical change a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance
Natural resource the natural wealth of a country, consisting of land, forests, mineral deposits, water, etc.
Synthetic material Something made of artificial material, not natural items, can be described as synthetic.

Hi there, would you like to get such a paper? How about receiving a customized one? Check it out