PS Module 1 Flashcards
physical science
the study of the structure of the earth as well as its place in the solar system
atom
the smallest chemical unit of matter
molecule
two or more atoms linked together to make a substance with unique properties
element
substances made of billions and billions and billions of the same atom
compound
substances made of billions and billions and billions of molecules
mixture
substances we see (i.e. cereal, plastics, woods) which are composed of several different substances, each of which is made up of either atoms or molecules
unit
a definite magnitude of a physical quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same physical quantity
metric system
a standard set of units that will be used by everyone
mass
how much matter exists in an object
slug
in the English system, the base English unit for mass
gram
in the metric system, the base metric unit for mass
foot
in the English system, the base English unit for distance
meter
in the metric system, the base metric unit for distance
gallon
in the English system, the base English unit for volume
litre
in the metric system, the base metric unit for volume
second
in the English system, the base English unit for time
second
in the metric system, the base metric unit for time
Newton
in the English system, the base English unit for weight
factor-label method
the sequential application of conversion factors expressed as fractions and arranged so that any dimensional unit appearing in both the numerator and denominator of any of the fractions can be cancelled out until only the desired set of dimensional units is obtained
Celsius
the unit scientists use when measuring temperature, sometimes called the “centigrade” temperature scale
concentration
the quantity of a substance within a certain volume
