The scientific method
01 // What it is
The scientific method is a process for testing an idea in a way other people can check. It is not a single fixed checklist — different textbooks list four, five, or seven steps — but the core idea is always the same: ask a question you can test, make a prediction, run a fair test, look at what actually happened, and change your thinking if the evidence disagrees with you.
Real scientists rarely move through the steps once in a straight line. A weird result usually sends them back to an earlier step: to run the test again, to control a variable they missed, or to ask a narrower question. Treat the steps below as a loop, not a one-way staircase.
02 // The six steps
1. Ask a question
Notice something and turn it into a question you can actually test, like "does more light make bean plants grow taller?"
2. Do background research
Find out what is already known, so you are not testing something already answered and your hypothesis is grounded in real information.
3. Form a hypothesis
Write a testable if-then-because prediction. See how to write a hypothesis.
4. Test it
Design a fair test: change one independent variable, measure one dependent variable, and hold everything else constant.
5. Analyze the data
Organize your measurements in a table, graph them, and look for a pattern between the variable you changed and the one you measured.
6. Conclude and report
State whether the data supports or does not support your hypothesis, and share your method so someone else could repeat it.
03 // Common mix-ups
- A hypothesis that turns out wrong is not a failed experiment. The test still worked if it was fair — you just learned the answer was no.
- A scientific theory is not a guess. In science, a theory is a well-tested explanation backed by a large body of evidence, like the theory of evolution or plate tectonics.
- A scientific law describes what happens (for example, Newton's laws of motion). A theory explains why it happens. Neither one is "more proven" than the other — they answer different questions.
04 // Questions people ask
Is the scientific method always followed in the same order?
No. It is normally taught as a straight list, but real investigations loop back constantly — an odd result sends a scientist back to check a controlled variable, refine the question, or run the test again before drawing any conclusion.
How many steps does the scientific method have?
It depends on the textbook — you will see it broken into four, five, six, or seven steps. This page uses six: question, background research, hypothesis, test, analyze, conclude. All versions cover the same ground; they just split or combine steps differently.
What is the difference between a scientific theory and a scientific law?
A law describes a pattern, usually as a rule or equation (Newton's second law: F = ma). A theory explains why the pattern happens, backed by a large body of evidence gathered over time. A theory does not "graduate" into a law — they are different kinds of statement.