See also. 1  Orthos (disambiguation) 2  Ortho Mode Transducer. 3  Orthochromatic. 4  Orthophotography. 5  Orthogonality. 6  Orthonormality. 7  Orthographic projection. 8  Orthoptera.
Doing a Fair Test. It is important for an experiment to be a fair test. You conduct a fair test by making sure that you change one factor at a time while keeping all other conditions the same. For example, let's imagine that we want to measure which is the fastest toy car to coast down a sloping ramp.ou conduct a fair test by making sure that you change one factor at a time while keeping all other conditions the same. For example, let's imagine that we want to measure which is the fastest toy car to coast down a sloping ramp.
Question. In order to do an experiment, you need to have a science fair question that you are trying to answer. When you have a question in mind, you will want to identify an Independent Variable, your Dependent Variable(s), and your Controlled Variables.This is a very important step in order to make your science fair experiment valid.ut simply: Pick a some interesting aspect of your topic and choose a question about that which you can answer by doing a science fair experiment. When doing your experiment it will be very important for you to identify any Controlled Variables that might affect the outcome of your experiment.