Three Kinds of Variables

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Presentation transcript:

Three Kinds of Variables

Three Kinds of Variables: 1). MANIPULATED (INDEPENDENT) VARIABLE- It is intentionally manipulated! What we will change is…. What we will change is time

Three Kinds of Variables: 2). RESPONDING (DEPENDENT) VARIABLE- It is affected or responds to the change (the manipulated variable) What we will measure is ____________ What we will measure is the number of bacteria

Three Kinds of Variables: 3). CONTROL (CONSTANTS)- It is not changed at all It is always constant Ensures fairness Same type of seed used; Same amount of water given at the same time each day…

Remember: A controlled experiment will only change one manipulated variable at a time. All other variables will be kept unchanged!

Control Group vs Experimental Group The experimental group has been manipulated by the independent variable. The control group always remains constant!