Things to keep in mind…
Remember what you have just done in English Class.
You need 4 sources (not Wikipedia).
You are researching the science behind your topic. For example if you are researching chlorine’s effect on plants. I would research what chlorine is, what it is used for, how it could be harmful etc. I would also research how plants take in nutrients, how plants grow, what can affect plant growth etc.
YOU NEED ENOUGH INFORMATION TO WRITE A 3 PAGE ESSAY
Your notes should be in your own words. If you are writing down something you don’t understand research that until you do!