That depends on your age ability and what area of science you are doing it on and what subject within that area you are doing.
Go to Sciencebuddies.com and you can find all kinds of projects!
There are two kinds of natural science. They are biology and chemistry. Sub branches include astronomy, physics, and earth science.
Science projects for teens include: hometrainingtools.com/a/science-projects 101science.com/science_experiments.htm education.com/science-fair/physical-science/
science buddies,free science fair projects, or just google it
paramedic
the answer is quiet simple Science Projects SO EASY!
Science projects
What if... Science fiction investigates possibilities.
Science studies Chemistry,Physics and Biology.
go on google and type in science fair projects its that simple
Interpolation & extrapolation
biology, pyschology, chemistry