Scientific Method | Definition, Steps & Examples

The scientific method is a process scientists use to explore and understand how the world works. It involves a series of steps designed to help researchers test ideas systematically and evaluate them against evidence.

Starting with an observation, scientists ask questions, develop hypotheses, collect and analyze data, and draw conclusions. By documenting their methods and results, they enable other researchers to repeat the process and verify the findings.

Put the scientific method into practice. Use Quillbot’s AI Checklist Generator to turn the key steps into a simple checklist you can use to guide your own investigation.

What is the scientific method?

The scientific method starts with a question prompted by an observation. For example, a scientist might ask, “Which material is the best insulator?” or “Does the amount of sunlight affect plant growth?”

To answer questions like these, scientists gather and examine evidence, test possible explanations, and use the results to draw conclusions. The process is generally described as a series of steps, although the exact number and order can vary depending on the research question, research method, or field of study.

New evidence or ideas may also lead scientists to revisit an earlier step, refine a hypothesis, or repeat part of the process. This makes the scientific method less of a fixed sequence and more of an ongoing process of testing and refining explanations.

What are the steps of the scientific method?

The scientific method is often described as a series of steps that guide scientists as they investigate a question and test possible explanations. Sources vary in how they group these steps, with some describing five steps and others as many as eight, but the overall process is similar.

1. Make an observation
2. Ask a question
3. Form a hypothesis
4. Test the hypothesis
5. Analyze the results
6. Draw a conclusion
7. Communicate the findings

1. Make an observation

The process often begins with an observation: something a scientist notices about the world that raises a question. For example, a scientist might notice that a metal spoon placed in hot water becomes warm quickly, while a wooden spoon does not.

2. Ask a question

The observation leads to a specific research question that can be investigated. In this case: “Does the material of a spoon affect how quickly it heats up?”

3. Form a hypothesis

A hypothesis is a proposed explanation for an observation or a testable answer to a research question. The scientist might hypothesize that spoons made from different materials heat up at different rates.

4. Test the hypothesis

A hypothesis needs to be tested against evidence to determine whether it holds up. In the spoon example, the scientist could place spoons made from different materials in water at the same temperature and collect data by measuring their temperatures at regular intervals.

5. Analyze the results

Scientists examine the data they collected to identify patterns and determine what the results show. In the spoon example, they might compare the temperature measurements to see whether some materials heated up faster than others.

6. Draw a conclusion

Scientists use their analysis to determine whether the evidence supports the hypothesis. If the results do not support it, they may revise the hypothesis and test it again.

7. Communicate the findings

Scientists document and share their methods, data, and conclusions so that others can evaluate the research, repeat the process, or build on its findings.

Scientific method example

Consider a correlational research study investigating whether higher levels of air pollution are associated with more frequent asthma symptoms.

1. Observation: Researchers observe that asthma symptoms vary among populations living in areas with different levels of air pollution.
2. Question: Is there a relationship between air pollution levels and asthma symptoms?
3. Hypothesis: Higher levels of air pollution are associated with more frequent asthma symptoms.
4. Test the hypothesis: Researchers collect air-quality and health data from relevant populations without manipulating either variable.
5. Analyze the results: They use statistical analysis to determine whether the two variables are significantly related.
6. Draw a conclusion: Researchers determine whether the evidence supports the hypothesis while considering other factors that could affect asthma symptoms.
7. Communicate the findings: Researchers publish their findings so other scientists can evaluate the evidence and build on the research.

Why is the scientific method important?

The scientific method matters because it’s what separates a good guess from a tested finding.

• The scientific method helps produce reliable findings. Because it’s systematic, researchers follow an organized procedure rather than random chance. They document their methods and results so other scientists can repeat the process and check whether the findings hold.
• It can lead to serendipitous discoveries. A key characteristic of the scientific method is its adaptability. Even though it’s a step-by-step process, that doesn’t mean it’s a fixed one; scientists may move back and forth, repeat parts of the process, or adapt their methods to the realities of conducting research. This leaves room for new and unexpected findings that push the scientific field forward.
• The scientific method allows science to evolve, advancing our understanding of the world. By putting ideas to the test, scientists can contribute to the development of new theories when their hypotheses are supported by evidence, or investigate further when their hypotheses are not.  Sometimes, new evidence leads the scientific community to revise older theories or even discard them.

Reliability gives science a solid foundation, flexibility keeps it from getting stuck, and the willingness to revise is what lets it keep improving. Together, these qualities help scientists produce findings that can be tested, challenged, and built upon.

Frequently asked questions about the scientific method

How many steps are in the scientific method?

There is no single agreed-upon number of steps in the scientific method. Sources commonly describe five to eight steps, depending on how they group different activities together.

In general, the process involves making an observation, asking a question, forming and testing a hypothesis, analyzing the results, drawing a conclusion, and communicating the findings.

Use Quillbot’s AI Chat if you want to further explore the scientific method and see how different sources present and group its steps.

Who invented the scientific method?

No single person invented the scientific method. It developed gradually over centuries, with thinkers such as Aristotle, Ibn al-Haytham, Galileo Galilei, Francis Bacon, and Isaac Newton contributing to the development of systematic approaches to studying the natural world.

If you’re curious about the history of the scientific method, Quillbot’s AI Chat can help you explore the key ideas and figures that shaped modern scientific inquiry.

Can the scientific method answer every question?

No. The scientific method works best for questions that can be investigated using observable evidence.

For example, scientists can study whether a drug lowers blood pressure or whether air pollution is linked to asthma symptoms.

But questions such as whether a painting is beautiful or whether people have a moral duty to protect the environment cannot be settled through scientific testing.

Curious whether a question can be investigated scientifically? Use Quillbot’s AI Chat to explore different questions and consider what evidence you would need to answer them.

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