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Scientific Method

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A logical and systematic approach to solving a scientific problem.

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Hypothesis

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A testable prediction; an educated guess about the outcome of an experiment.

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Experiment

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A scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.

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Manipulated variable

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The variable that is deliberately changed.

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Responding variable

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The factor in an experiment that a scientist wants to observe, which may change in response to the manipulated variable.

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Controlled variable (constant)

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A variable in an investigation or experiment that is kept constant

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Control group

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The group that does not receive the experimental treatment.

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Experimental Group

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The group in an experiment that receives the variable being tested.

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Observation

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Information obtained through the senses.

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Qualitative data

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Information describing color, odor, shape, or other physical characteristics