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Name: Timmy
Status: student
Age: 13
Location: N/A
Country: N/A
Date: 1999-2001

What is a controlled variable - This likely refers to the independent variable, the variable that is manipulated in a systematic way by the experimenter.

What is a uncontrolled variable - I have not heard of this term, but it may refer to what is sometimes called a confounding variable - a variable that may introduce errors in the results. Experimenters try to eliminate confounding variables as much as possible.

What is a dependent variable - This is the variable that is being watched and/or measured. We wonder if or how it is affected by the independent variable.

What is a independent Variable - This is the variable manipulated by the experimenter. The name is a little misleading. It is not truly independent, but rather carefully controlled (related to you first term).

Larry Krengel

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