science
what is suspension
suspension is a heterogeneous mixture made of parts that separate upon standing
what is emulsion
emulsion is a suspension of two liquids that usually do not mix together
what is periodic table
the periodic table is a chart that shows the element in order of increasing atomic number
what is molecule
the molecule is the smallest particle of a compound that still has all the qualities of that compound
what is temperature
temperature is a measurement of how hot on cold something is
what is sublimation
sublimation occurs when a substance changes directly from a solid to a gas without going through a liquid state
what is melting point
melting point a solid that is a pure substance has a characteristic
freezing point
freezing point the temperature at which a liquid freezes
boiling point
the temperature at which a liquid becomes a gas
vaporization
is the process by which a liquid change to a gas
pressure
physical change
altering the size shape or state of a substance without forming a new substance
mixture
a physical combination of two on more substance that blend together without forming new substances
colloid
is a stable mixture in which small fine particles of one material are scattered throughout another material blocking passage of light without setting out
solution
a homogeneous mixture of one substance dissolved in another
alloys
are mixtures of one or more metals with other solids
solubility
is a physical property of solutes in different solvents
distillation
separates the parts of a mixture by vaporization and condensation
chemical bonds
chemical changes
produce new substances with chemical properties that are different from those of the original substances
reactant
a substance present before a chemical change
product
a substance produced by a chemical change
chemical equation
use letters and numbers to represent the amounts of reactants the amounts of reactants and products involved in ac chemical change
exothermic
reactions that release energy
endothermic