Your science project notebook is an important part of your project. All the data gathered during your experiment should be carefully recorded in a notebook. 
This includes:- Data gathered as a result of the experiment itself and much more.
- A list of all the materials used. 
- Notes on all the preparations you made prior to starting your experiment. 
- Information about the resources you use (books, people, libraries, Internet, etc.). 
- Detailed day-by-day notes on the progress of the project. 
- What you are actually doing. 
- Problems you encounter with the experiment. 
- Things you would change if you were doing this investigation again.
- Any drawings that might help explain your work. 
- Data that was gathered during the course of the experiment (notes, charts, tables, graphs). 
Be sure to date each entry in your notebook!