How to write a scientific research hypothesis

Granting agencies and institutions typically have many rules regarding the format, content, and length of a proposal.

How to Write a Hypothesis

What happens if, at the end of your science project, you look at the data you have collected and you realize it does not support your hypothesis? If your science fair is over, leave a comment here to let us know what your hypothesis was for your project.

As Dave explains, "A hypothesis is a possible explanation for something that is observed in nature. They have these rules to protect their reviewers, who commonly review proposals for no recompense other than fulfilling their sense of obligation to the field of study.

A Strong Hypothesis

A single hypothesis can lead to multiple predictions, but generally, one or two predictions is enough to tackle for a science fair project. Educators can also assign students an online submission form to fill out detailing the hypothesis of their science project.

Predictions should include both an independent variable the factor you change in an experiment and a dependent variable the factor you observe or measure in an experiment. When you go and dig a 3-foot by 3-foot-wide and 1-foot-deep hole in the dirt in those two states, you discover Floridian earthworms, but not Alaskan ones.

If they leave the classroom, the students feel free to break the rules and talk more, making the room nosier. A hypothesis is usually written in a form where it proposes that, if something is done, then something else will occur.

Examples of Hypothesis

Answering some scientific questions can involve more than one experiment, each with its own hypothesis. For any other use, please contact Science Buddies.

Keep your language clean and simple. A hypothesis is a statement, not a question. State Your Case Scientists can really change the world with their hypotheses and findings. What you "think" will happen, of course, should be based on your preliminary research and your understanding of the science and scientific principles involved in your proposed experiment or study.

For example, it is a common observation that objects that are thrown into the air fall toward the earth. Drinking sugary drinks daily leads to obesity. State your hypothesis as concisely, and to the point, as possible.

For example, I may want to drink root beer all day, not green tea. Staff Scientist Dave reminds that scientific experiments become a dialogue between and among scientists and that hypotheses are rarely if ever "eternal.

A Summary - best written after the following is written.

A timetable to show how you plan to accomplish the work. A brief explanation of the work previously done, emphasizing why it is inadequate.

If I measure the noise level in a classroom when a teacher is in it and when she leaves the room, then I will see that the noise level is higher when my teacher is not in my classroom. Hypotheses to be tested are that concentrations of Hg and Cd are greater in avocadoes from groves in which groundwater has higher concentrations.

A hypothesis leads to one or more predictions that can be tested by experimenting. Writing a scientific grant proposal: Well, the natural world is complex—it takes a lot of experimenting to figure out how it works—and the more explanations you test, the closer you get to figuring out the truth.

A good hypothesis defines the variables in easy-to-measure terms, like who the participants are, what changes during the testing, and what the effect of the changes will be.Writing a scientific grant proposal: advice for students This is a page to help students, typically beginning graduate students in the sciences, get started on writing proposals for funding.

The hypothesis is a critical part of any scientific exploration. It represents what researchers expect to find in a study or experiment. In some cases, the original hypothesis will be supported and the researchers will find evidence supporting their expectations about the nature of the relationship between different variables.

Newton's hypothesis demonstrates the techniques for writing a good hypothesis: It is testable. It is simple. It is universal.


It allows for predictions that will occur in new circumstances. It builds upon previously accumulated knowledge (e.g., Newton's work explained the observed orbits of the planets). Although you could state a scientific hypothesis in various ways, most hypothesis are either "If, then" statements or else forms of the null hypothesis.

The null hypothesis sometimes is called the "no difference" hypothesis. The null hypothesis is good for experimentation because it's simple to disprove. A hypothesis is a tentative, testable answer to a scientific question.

Once a scientist has a scientific question she is interested in, the scientist reads up to find out what is already known on the topic. A null hypothesis (H0) exists when a researcher believes there is no relationship between the two variables, or there is a lack of information to state a scientific hypothesis.

This is something to attempt to disprove or discredit.

How to write a scientific research hypothesis
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