Scientific Investigation Design
STEP 1: Ask a QUESTION
Include both the manipulated and responding variable.
STEP 2: Gather Relevant BACKGROUND Information.
STEP 3: Make a PREDICTION (Hypothesis)
Provide a cause-effect reason for the responding variable to behave as predicted. If _____, then _____ , because _____.
STEP 4: Design an EXPERIMENT
b. Detailed Procedure
- One manipulated variable (independent) - state at what interval or how the manipulated variable will be changed.
- One responding variable (dependent) - state at what intervals or when the responding variable will be measured and recorded.
- Identify at least two controlled variables (kept the same).
- Identify an experimental control condition to serve as a basis of comparison.
- Include repeated trials. The procedure should be carried out more than just once.
- Account for issues affecting validity, for example cleaning equipment between trials.
- Be specific enough that someone else who reads your procedure and repeated your investigation would likely get the same results.
STEP 5: Record DATA
Use a data table to record results. Describe the trend of the data using calculations and graphs.
STEP 6: Draw a CONCLUSION
- Answer the question or respond to the hypothesis. Support your conclusion with data.
- Evaluate your work (quality control).
- What new questions might you ask?
Revised Nov. 2004 | Oak Harbor School District | Grades 9 - 10