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Learn the six steps of the scientific method, a process for experimentation that is used to explore observations and answer questions. Find out how to ask a question, do background research, construct a hypothesis, test your hypothesis, analyze your data and draw a conclusion, and communicate your results. See examples of science fair projects that follow the scientific method.
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- Variables
- Overview
- Introduction
- The scientific method
- Scientific method example: Failure to toast
- 1. Make an observation.
- 3. Propose a hypothesis.
- 4. Make predictions.
- 5. Test the predictions.
- 6. Iterate.
How the scientific method is used to test a hypothesis.
1.Make an observation.
2.Ask a question.
3.Form a hypothesis, or testable explanation.
4.Make a prediction based on the hypothesis.
5.Test the prediction.
A biology investigation usually starts with an observation—that is, something that catches the biologist’s attention. For instance, a cancer biologist might notice that a certain kind of cancer can't be treated with chemotherapy and wonder why this is the case. A marine ecologist, seeing that the coral reefs of her field sites are bleaching—turning white—might set out to understand why.
How do biologists follow up on these observations? How can you follow up on your own observations of the natural world? In this article, we’ll walk through the scientific method, a logical problem-solving approach used by biologists and many other scientists.
At the core of biology and other sciences lies a problem-solving approach called the scientific method. The scientific method has five basic steps, plus one feedback step:
1.Make an observation.
2.Ask a question.
3.Form a hypothesis, or testable explanation.
4.Make a prediction based on the hypothesis.
5.Test the prediction.
Let's build some intuition for the scientific method by applying its steps to a practical problem from everyday life.
Let's suppose that you get two slices of bread, put them into the toaster, and press the button. However, your bread does not toast.
A hypothesis is a potential answer to the question, one that can somehow be tested. For example, our hypothesis in this case could be that the toast didn't toast because the electrical outlet is broken.
This hypothesis is not necessarily the right explanation. Instead, it's a possible explanation that we can test to see if it is likely correct, or if we need to make a new hypothesis.
[Can any explanation count as a hypothesis?]
[Is a hypothesis a theory?]
A prediction is an outcome we'd expect to see if the hypothesis is correct. In this case, we might predict that if the electrical outlet is broken, then plugging the toaster into a different outlet should fix the problem.
To test the hypothesis, we need to make an observation or perform an experiment associated with the prediction. For instance, in this case, we would plug the toaster into a different outlet and see if it toasts.
•If the toaster does toast, then the hypothesis is supported—likely correct.
•If the toaster doesn't toast, then the hypothesis is not supported—likely wrong.
The results of a test may either support or contradict—oppose—a hypothesis. Results that support a hypothesis can't conclusively prove that it's correct, but they do mean it's likely to be correct. On the other hand, if results contradict a hypothesis, that hypothesis is probably not correct. Unless there was a flaw in the test—a possibility we should always consider—a contradictory result means that we can discard the hypothesis and look for a new one.
The last step of the scientific method is to reflect on our results and use them to guide our next steps.
And the result is:
Left panel: My bread toasts! Hypothesis is supported. Right panel: My bread still won't toast. Hypothesis is not supported.
•If the hypothesis was supported, we might do additional tests to confirm it, or revise it to be more specific. For instance, we might investigate why the outlet is broken.
•If the hypothesis was not supported, we would come up with a new hypothesis. For instance, the next hypothesis might be that there's a broken wire in the toaster.
In most cases, the scientific method is an iterative process. In other words, it's a cycle rather than a straight line. The result of one go-round becomes feedback that improves the next round of question asking.
Jan 1, 2023 · Scientific Method Steps (sciencenotes.org) The scientific method is a system scientists and other people use to ask and answer questions about the natural world. In a nutshell, the scientific method works by making observations, asking a question or identifying a problem, and then designing and analyzing an experiment to test a prediction of ...
Jul 31, 2023 · Here are the seven steps of the scientific method illustrated by an example scientific hypothesis: 1. Ask a question. The first step in the scientific method is asking a question you want to answer. This question will include one of the key starters: how, what, when, why, where, who or which.
- What questions can the scientific method answer?The scientific method can help researchers, scientists and students answer questions that they can prove or disprove through testing.
- What questions can the scientific method not answer?The scientific method can't answer questions that are difficult or impossible to test, like what the nature of dark matter is or whether we're alon...
- How can you increase the validity of the scientific method?You can improve the scientific method and increase its accuracy by improving the testing technique, controlling a greater number of variables and r...
- Make an Observation (Theory Construction) Every researcher starts at the very beginning. Before diving in and exploring something, one must first determine what they will study – it seems simple enough!
- Ask a Question. Once a researcher has made observations and conducted background research, the next step is to ask a scientific question. A scientific question must be defined, testable, and measurable.
- Form a Hypothesis (Make Predictions) A hypothesis is an educated guess about the relationship between two or more variables. A hypothesis is an attempt to answer your research question based on prior observation and background research.
- Run an Experiment (Gather Data) The next step in the scientific method is to test your hypothesis and collect data. A researcher will design an experiment to test the hypothesis and gather data that will either support or refute the hypothesis.
3 days ago · scientific method, mathematical and experimental technique employed in the sciences. More specifically, it is the technique used in the construction and testing of a scientific hypothesis. The process of observing, asking questions, and seeking answers through tests and experiments is not unique to any one field of science.
The scientific method has five basic steps, plus one feedback step: Make an observation. Ask a question. Form a hypothesis, or testable explanation. Make a prediction based on the hypothesis. Test the prediction. Iterate: use the results to make new hypotheses or predictions.
