Stating hypotheses

Every stating hypotheses you read about doing an experiment or starting a science fair project, it always says you need a hypothesis.

How do you write a hypothesis? How do you come up with a good hypothesis? Continue reading «What is a hypothesis? You can give a real share of stock in America’s favorite companies and have the actual stock certificate framed with an engraved custom message to anyone in less than three minutes! Shareholder receives annual reports, dividend checks, and one vote at meetings. Get One Share of Your Favorite Company!

A hypothesis is sometimes described as an educated guess. That’s not the same thing as a guess and not really a good description of a hypothesis either. Let’s try working through an example. If you put an ice cube on a plate and place it on the table, what will happen? A very young child might guess that it will still be there in a couple of hours. An ice cube will melt in less than 30 minutes. You could put sit and watch the ice cube melt and think you’ve proved a hypothesis.

But you will have missed some important steps. For a good science fair project you need to do quite a bit of research before any experimenting. Start by finding some information about how and why water melts. You could read a book, do a bit of Google searching, or even ask an expert. For our example, you could learn about how temperature and air pressure can change the state of water. Don’t forget that elevation above sea level changes air pressure too.

Now, using all your research, try to restate that hypothesis. An ice cube will melt in less than 30 minutes in a room at sea level with a temperature of 20C or 68F. What is the ice made from? What if the ice cube was made from salt water, or you sprinkled salt on a regular ice cube? Would adding salt make a difference?

Would other chemicals change the melting time? Using this new information, let’s try that hypothesis again. An ice cube made stating tap water will melt in less than 30 minutes in a room at sea level with a hypotheses of 20C or 68F.

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Does that seem like an educated guess? No, it sounds like you are stating the obvious. At this point, it is obvious only because of your research. You haven’t actually done the experiment. Now it’s time to run the experiment to support the hypothesis.

A hypothesis isn’t an educated guess. It is a tentative explanation for an observation, phenomenon, or scientific problem that can be tested by further investigation. Once you do the experiment and find out if it supports the hypothesis, it becomes part of scientific theory. Every parent must use their own judgment in choosing which activities are safe for their own children. While Science Kids at Home makes every effort to provide activity ideas that are safe and fun for children it is your responsibility to choose the activities that are safe in your own home.

This is explained more fully on next page.
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