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Understanding Experiment Components: Variables, Constants, and Control

Learn about the key parts of an experiment, including independent and dependent variables, constants, and the control group. See examples and explanations to grasp the importance of each element in conducting accurate scientific investigations.

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Understanding Experiment Components: Variables, Constants, and Control

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  1. Parts of an Experiment Beth Roland Eighth Grade Science

  2. Variables • Independent Variable- The factor in an experiment that is purposefully changed by the experimenter. • Dependent Variable- The factor that is influenced (changed) as a result of the independent variable. • Example: What effect does miracle grow have on the number of flowers a tulip will produce? • IV – amount of miracle grow • DV- number of flowers

  3. Constants • In order the isolate the impact that the independent variable has in an experiment it is necessary to keep all other factors constant or unchanging. • Constants- Factors in an experiment that are intentionally kept the same. • Example: Same type of tulips, amount of water, amount and type of soil

  4. Control • Control is the group in an experiment that does not receive the independent variable. • Example: The tulip plant that doesn’t receive the miracle grow

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