Research Methods
Middle School
Definition
The systematic techniques scientists use to collect and analyse information, chosen to suit the question being investigated. Methods range from controlled experiments to careful observation, such as astronomical observation of distant objects.
Worked examples
A biologist sets up two identical plant groups, waters one with salt water and one with fresh water, then measures growth over four weeks.
A controlled experiment isolates one variable to test cause and effect.
An astronomer records the brightness and position of a supernova over months without interfering with it.
Observational methods gather data when experiments are impossible or unethical.
A chemist surveys 200 students about recycling habits, then analyzes patterns in the responses.
Survey methods collect large-scale data about behaviors or opinions.
Common mistakes
- Using observation when a controlled experiment is possible and ethical → Choose controlled experiments when you can manipulate variables safely Experiments reveal cause-and-effect more clearly than observation alone.
- Picking a method before defining the research question → Define your question first, then select the method that best answers it The question dictates the method — not the reverse.
- Assuming one method works for every type of investigation → Match the method to the context (lab vs field, ethical limits, scale) Different questions and contexts demand different approaches.
Where you'll use it next
You'll apply research methods when designing science fair projects, lab practicals, and field studies in biology, chemistry, physics, and environmental science courses, and when evaluating the quality of studies you read.
See also
Data CollectionData AnalysisScientific ToolsHypothesis TestingInvestigation DesignObservation Skills
Reviewed by Pat Cheng, M.Ed. — StudyPug Curriculum Lead · Last updated June 6, 2026