As you do experiments, record all numerical measurements made. Data can be amounts of chemicals used, how long something is, the time something took, etc. If you are not making any measurements, you probably are not doing an experimental science project. Your Observations Observations can be written descriptions of what you noticed during an experiment, or problems encountered. Keep careful notes of everything that happens.
Observations are valuable when drawing conclusions, and useful for locating experimental errors.
Do any calculations needed from your raw data to obtain the numbers needed to draw your conclusions. Not all experiments need a calculation section. However, if you do not have any calculations to make, you may not be using the scientific experimental method. Summarize results Summarize what happened. This can be in the form of a graphs or a written statement of what occurred during the experiments.