In the beginning steps of the scientific method observations are made, questions are posed, and a research hypothesis is formed.
This is a general statement of the answer to the question and is derived by inductive reasoning.
In a controlled experiment, a researcher manipulates or changes one factor and observes other factors that change in response to the manipulated one.
All other factors are controlled or kept constant throughout the experiment. The independent variable is the condition or event under study.
From what you have seen, you decide that Spartan fertilizer helps houseplants grow well, and you design an experiment to test this idea.
You set up the experiment as follows: 25 periwinkle plants of the same size are potted in individual 6” clay pots.
Often, the factor you are manipulating (the independent variable) is stated after the after the “if” part of the hypothesis statement or prediction.
The variable or factor stated after the “then” part of the statement is the dependent variable.
Like hypotheses, theories may be modified or rejected over time in the light of new information and knowledge.
Scientific Method: Scenario #1 You and your lab partner have been given the assignment of growing plants at home for second semester in class.