Unit 5 Vocabulary
Review Words
Chemical Bond – a means by which atoms, ions, or groups of atoms
are held together in a molecule or crystal
Density – the amount of matter in a given space or volume, a
relationship between mass and volume
Physical Change – a change that does not alter the identity of a
substance; it only alters the appearance
Physical Properties - those characteristics that can be observed
without changing the identity of the substance such as size,
shape, luster, conductivity, malleability, and magnetic attraction
Substance – what something consists of
Temperature – how hot or cold something is
Content Words
Chemical Change: a change that alters the identity of a substance
resulting in a new substance or substances with different
properties
Chemical Property: those characteristics that can be observed
when a chemical reaction changes the identity of the substance,
such as potential to rust, corrode, or combust
Chemical Reaction: the process by which one or more substances
change to produce one or more different substances
Combustion: the process of burning; a chemical change, especially
oxidation, accompanied by the production of heat and light
Corrosiveness: the result of a chemical reaction between a metal
and its surroundings during which the metal is oxidized
Flammability: how capable something is of being easily set on fire
and of burning rapidly
Precipitate: evidence of a chemical reaction; a solid substance in
suspension (making the solution cloudy) or settled to the bottom
of the solution
Rotting: to decay due to the action of fungi or bacteria
Rusting: red oxides, formed by the reaction of iron and oxygen in
the presences of water or air moisture
Tarnish: to make or become dull, dim, or discolored