wunder beta🔬 The Scientific Method
How science turns curiosity into evidence you can actually trust.
What you’ll learn
- Describe how science moves from observation to a testable hypothesis.The scientific method reduces bias by testing ideas against evidence. It begins with observation and a focused question, leads to a testable hypothesis, and builds on prior research.
- Explain controlled experiment design, including variables and control groups.Controlled experiments change one independent variable, measure a dependent variable, and hold control variables constant. Control groups provide a baseline, and honest data collection and analysis reveal real patterns.
- Evaluate how conclusions, falsifiability, and peer review make science reliable.Conclusions must be justified and provisional. Falsifiability distinguishes science, while peer review and reproducibility check results, making science self-correcting over time.
Questions this course answers
What is a scientific hypothesis?
A hypothesis is a testable, predictive statement based on prior knowledge that can be supported or refuted by evidence.
What typically comes first in the scientific method?
Science begins with careful observation and curiosity, which is turned into a clear, testable question.
Why do scientists review prior work before experimenting?
Reviewing prior work sharpens the question, reveals proven methods, and lets science build cumulatively.
What is the independent variable in an experiment?
The independent variable is the factor deliberately changed, while the dependent variable is the measured outcome.
Why are control variables kept constant?
Keeping other factors constant ensures that any difference in the outcome can be attributed to the tested factor.
What is the purpose of a control group?
A control group is treated identically except for the tested factor, providing a baseline so real effects can be identified.
Grounded in trusted sources
- Simply Psychology, Steps of the Scientific Method, https://www.simplypsychology.org/steps-of-the-scientific-method.html
- Understanding Science, University of California Museum of Paleontology, https://undsci.berkeley.edu/
- Karl Popper, The Logic of Scientific Discovery (1959)
- Medicine LibreTexts, Overview of the Scientific Method, https://med.libretexts.org/Courses/Chabot_College/BIOS15:_Anatomy_and_Physiology_Textbook/01:_An_Introduction_to_Anatomy_and_Physiology/1.02:_Overview_of_the_Scientific_Method
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