So what interests you? Before we pick a specific science fair idea, we should investigate the branches of science that you find most interesting. Let's look at a list of a few general scientific fields:

FIELD acoustics aerodynamics anatomy anthropology astronomy biology botany chemistry climatology cytology ecology economics geology mathematics mechanics meteorology optics physics psychology seismology semantics sociology urbanology zoology

STUDY OF sound movement in a flow of air or gas structure of the body human cultures celestial objects life plants properties of substances climate living cells environment money and material wealth earth's crust numbers action of force on objects weather light properties of matter and energy mind earthquakes meaning society cities animals

Wow! Quite a few to choose from--and remember that many of these general fields have a lot of sub-categories, so the list of science fair ideas you can investigate is virtually endless. (For a much more extensive list, visit phrontistery.info/sciences.html)

So how do you go about choosing a science fair project idea? Well, one way might be to decide which subject you are best at in school. Do you like math? Then you might be interested in a science fair idea involving early computers, calculating machines, geometry, algebra, or even computer software. What about gym or health class? Then maybe you would be interested in anatomy, which is the study of the human body. If you've ever used a microscope in a science class, then you could try a science fair project idea in microbiology, which is the study of tiny organisms, like bacteria and amoebas.

If none of the subjects in school interest you enough to do a science fair project on them, then think about what you like to do outside of school. Maybe you like the outdoors and the environment. In that case, try botany, which is the study of plants, or geology, which is the study of rocks and minerals, or nature conservation. Or maybe you have a telescope at home and like to look at planets and stars. In that case, astronomy would be a great science fair idea. There are many great books with more science fair project ideas that may help you choose a topic. Click here to see what's available.