What is important to record in an experiment?

Sometimes you can forget what the results of your first test was. It's always good to repeat an experiment more than once, so you can be sure that your tests worked correctly. And, because you should be repeating the tests, you'll want to record the results each time, so you can compare them when you're finished. That way, if something goes wrong, the results will show in which test it went wrong. Plus, if you're doing something for a class, I'll bet you anything that the teacher/professor will want it written down somewhere. Hope this helps!