What term refers to a scientific test or procedure conducted under controlled conditions to answer a question?

What term refers to a scientific test or procedure conducted under controlled conditions to answer a question?

• A. Observation
• B. Hypothesis
• C. Field Study
• D. Experimental Investigation

Answer: (D)

When you want to answer a question by testing something under careful control, you’re looking at an experimental investigation. This approach involves deliberately changing one factor (the independent variable) while keeping everything else the same (controls) and then measuring what happens (the dependent variable). This setup helps you isolate cause and effect and draw reliable conclusions from the results. Observation, by contrast, is simply watching and recording what happens without manipulating conditions. A hypothesis is a testable statement that you plan to evaluate with data, not the procedure itself. A field study involves collecting data in a real-world setting where conditions aren’t as tightly controlled as in a lab.

When you want to answer a question by testing something under careful control, you’re looking at an experimental investigation. This approach involves deliberately changing one factor (the independent variable) while keeping everything else the same (controls) and then measuring what happens (the dependent variable). This setup helps you isolate cause and effect and draw reliable conclusions from the results.

Observation, by contrast, is simply watching and recording what happens without manipulating conditions. A hypothesis is a testable statement that you plan to evaluate with data, not the procedure itself. A field study involves collecting data in a real-world setting where conditions aren’t as tightly controlled as in a lab.