Which term describes the experimental factor that is manipulated to observe its effect?

Which term describes the experimental factor that is manipulated to observe its effect?

• A. Independent Variable
• B. Dependent Variable
• C. Control
• D. Constant

Answer: (A)

The factor you deliberately change in an experiment to see its effect is the independent variable. This is the variable researchers manipulate to test how it influences the outcome being measured. The result you observe and quantify is the dependent variable. Conditions kept the same to ensure a fair test are controls, and values that don’t vary across trials are constants. For example, in studying how sunlight affects plant growth, the amount of sunlight is the independent variable, plant height is the dependent variable, and other factors like soil type or water are kept constant as controls.

The factor you deliberately change in an experiment to see its effect is the independent variable. This is the variable researchers manipulate to test how it influences the outcome being measured. The result you observe and quantify is the dependent variable. Conditions kept the same to ensure a fair test are controls, and values that don’t vary across trials are constants. For example, in studying how sunlight affects plant growth, the amount of sunlight is the independent variable, plant height is the dependent variable, and other factors like soil type or water are kept constant as controls.