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9Sci CH1

9th Science CH1 The Nature of Science

TermDefinition
constant in an experiment, a factor that doesn’t change
control in an experiment, a standard for comparison that is often needed to draw a meaningful conclusion
dependent variable in an experiment, the factor whose value changes because of a change in the independent variable
experiment an organized procedure for testing a hypothesis. An experiment typically has a control and dependent and independent variables
hypothesis a testable prediction used to see how something works or to solve a problem
Independent variable in an experiment, the factor adjusted to a different value by the experimenter to see what effect it will have on the dependent variable
model a symbolic representation of an idea, system, or structure to make something understandable
observation using your senses to gather information; in science, we use instruments such as microscopes and balances to carefully gather accurate and detailed observations
physical science the study of matter and energy; topics for study include chemistry and physics
scientific law a rule that describes, but doesn’t explain, a pattern in nature and predicts what will happen under specific conditions
technology the practical use of scientific information to improve the quality of human life
theory the most logical explanation of why things work the way they do; a theory is a former hypothesis that has been tested with repeated experiments and observations and found always to work