Science
is a system of knowledge and the methods you use to find that knowledge
Technology
is the use of knowledge to solve practical problems
Chemistry
is the study of the composition, structure, properties, and reaction of matter
Scientific Method
an organized plan for gathering, organizing, and communicating information
Observation
is information that you obtain through your senses
Hypothesis
is a proposed answer to a question
Manipulated variable
the speed with which you run or walk
Responding variable
the amount of water that you accumulate
Controlled experiment
experiment in which only one variable, the manipulated variable, is deliberately changed at a time.
Scientific theory
a well-tested explanation for a set of observations or experimental results
Scientific law
is a statement that summarizes a pattern found in nature
Model
a representation of an object or event
Scientific notation
way of expressing a value as the product of a number between 1 and 10 and a power of 10
Length
the straight-line distance between 2 points
Mass
the amount of matter in an object
Volume
the amount of space taken up by an object
Density
the ratio of a material's mass to its volume
Conversion factor
a ratio of equivalent measurements that is used to convert a quantity from one unit to another
Precision
a gauge of how exact a measurement is
Accuarcy
the closeness of a measurement to the true value of what is measured