ch 1: scientific method
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15 Terms
density
the ratio of a material's mass to its volume
hypothesis
a proposed answer to a question
mass
amount of matter in an object
model
a representation of an object or event
scientific law
a statement that summarizes a pattern found in nature
scientific method
an organized plan used for gathering, organizing, and communicating information
scientific theory
a well-tested explanation for a set of observations or experimental results
independent variable
the variable that causes a change in another variable
volume
the amount of space taken up by an object
observation
information obtained through the senses
dependent variable
a variable that changes in response to the independent variable, what is measured
controlled experiment
an experiment in which only 1 variable, the independent variable, is deliberately changed at a time
scientific notation
a way of expressing a value as the product of a number between 1 and 10 and a power of 10
precision
a gauge of how exact a measurement is
accuracy
the closeness of a measurement to the true value of what is measured