Observations should be recorded for each experiment in ink. Observations are what you saw during the experiment, what was seen initially, all the changes that were seen, and the final conditions that were seen. This includes the observable properties of the reactants, all changes that occur during the reactions, and the observable properties of the products of your reactions. Examples include:

Note the important difference between solutions that are clear and solutions that are colorless.

Record your observations during the experiment. DO NOT wait until the end of the experiment to write them down. You will probably have forgotten a lot of the details or may remember them incorrectly.