When you write your hypothesis, it should be based on your "educated guess" not on known data.
Similarly, the hypothesis should be written you begin your experimental procedures—not after the fact.
If you keep in mind the format of a well-constructed hypothesis, you should find that writing your hypothesis is not difficult to do. The above hypothesis is too simplistic for most middle- to upper-grade science projects, however.
You'll also find that in order to write a solid hypothesis, you need to understand what your variables are for your project. As you work on deciding what question you will explore, you should be looking for something for which the answer is not already obvious or already known (to you).
Kristin says: "This statement may or may not be true, but it is not a scientific hypothesis. There are no observations that a scientist can make to tell whether or not the hypothesis is correct.
This statement is speculation, not a hypothesis." Sandra says: "This statement is not 'bite size.' Whether or not something is a 'good natural pesticide' is too vague for a science fair project.It’s a given that, if you’re allowed to choose your topic, then you should choose something you’re interested in.You’ll be spending a lot of time with this topic, after all. If not, read How to Choose a Research Paper Topic That Wins Big.Remember, this is scientific and scholarly stuff we’re talking about, so don’t think Google will have everything you need.If you insist on using Google, opt for Google Scholar.If you need to write survey questions, read 2 Types of Sample Survey Questions for Your Research Paper and How to Write Perfect Survey Questions for Your Paper.After the study is complete, you’ll need to write the paper.Look for fresh angles on the topic to see where you might add to the current studies or create something completely new.For instance, let’s say you’re studying sleep patterns.Keep in mind that writing the hypothesis is an early step in the process of doing a science project.The steps below form the basic outline of the Scientific Method: To help demonstrate the above principles and techniques for developing and writing solid, specific, and testable hypotheses, Sandra and Kristin, two of our staff scientists, offer the following good and bad examples.