Exactly what do you hope to figure out? What is the "what if " question? You should be able to write the research question in a simple sentence.
In fact, keep the whole project simple. This is important to the scientific process: the simpler the experiment, the easier it is to keep "all other conditions" the same and change only one thing.
That's how you can be sure that the thing you are changing is actually causing any difference you measure.
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The Hypothesis ...
"Hypothesis" means "what do you expect to happen in your experiment?" Suppose your research question is, "what happens to seeds if I change the temperatures at which they are kept before they are planted?" The hypothesis might be "the higher the temperature at which seeds are kept, the quicker I expect them to sprout."
It's important to phrase your hypothesis correctly. For example, don't say "higher temperatures are better for seeds." "Better" cannot be measured. Decide on a hypothesis that can be proved in a measurable way. For example, "higher temperatures will make the seeds sprout faster."
It is perfectly fine for your experiment to disprove your hypothesis. If something unexpected happens during your experiment, the project doesn't need to be trashed. You just discovered something new and showed that what we expect is not always what we get.
Do some studying before you decide on your hypothesis. Sources of information include school and public libraries and the Internet. Also, once you have some background, you might consider writing, or e-mailing a scientist who works in the field you've chosen for your project.
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The procedure is how you plan to do things: how you are going to conduct your experiment.
An experiment can only have one variable. That means you can only change one condition in each experiment.
For example, with the seed-sprouting experiment, if you vary the temperature at which the seeds are stored before you plant them, keep each group of seeds at that temperature for the same amount of time. And make sure all of the seeds get the same amount of light and water after you plant them.
If there's more than one variable, the experiment becomes flawed. It can be hard to figure out what other conditions must stay the same. But it may help to think it through before you start your experiment.
Also think about how long your experiment will take before you decide on your procedure. If you only have a few weeks to do your experiment, don't decide on a procedure that will take months to carry out.
Think about your "sample size." How many seeds will you test at each temperature? Allow a big enough sample so you can have a few duds in each group.
Once you decide on a procedure, write it down step by step. That way, you can prove what you did and can follow the same procedure if you need to repeat the experiment.
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This is where you collect the information or data. Your data should be in numbers, not just what you see. For example, say that some of your plants grew 1 centimeter the third day. Don't say that the plants "look bigger today than they did yesterday." Words like "bigger" mean different things to different people, so reporting your results using only words can lead to confusion. You want to tell people exactly how much your plants grew.
Keep all your results in one notebook.
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It can be hard to understand the difference between results and conclusion, but the two are very different.
Results are the specific data collected during the experiment. The conclusion is what you learned from doing the experiment, and what the results mean. You might also think of the conclusion as a summary. In just a few sentences, you need to explain what happened in your experiment and whether it agreed with your hypothesis.
Did your data (the measurements you took) support your hypothesis? If not, that's a result, too. It doesn't mean that the experiment didn't work. Also, consider other possible explanations for your results. Did your treatment kill your plants or was it that you left them outside and some insects ate some of the leaves? You're not out to "prove" your hypothesis but to test it. Think more along the lines of "here's what I thought was going to happen and here's what actually happened." Then go on to explain why you think things happened the way they did.