A scientific procedure to make a discovery, test a hypothesis, or demonstrate a known fact is called?

• A. Experiments
• B. Valid
• C. Experimental design
• D. Independent Variable

Answer: (A)

Experiments are the hands-on procedures scientists use to discover, test a hypothesis, or demonstrate a known fact. They involve carrying out a planned set of steps, manipulating an independent variable, and observing the outcomes to gather evidence. This makes the term the best fit because it clearly describes the actual process used to investigate questions and generate data. The other terms refer to aspects of the process or its quality rather than the procedure itself: being valid describes whether results are trustworthy, experimental design is the plan for how the study is conducted, and the independent variable is what you deliberately change during the test.