A hypothesis is an educated guess about how things work. It is an attempt to answer your question with an explanation that can be tested. A good hypothesis allows you to then make a prediction: "If _____[I do this] _____, then _____[this]_____ will happen.”
Use this mastery rubric to check your learning for each skill or concept in this section of your science project. Identify which level you think you are currently at, add notes about why you think you're at that level, and plan what you can do to improve and take your project to the next level.