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.
1 Science Fair Project Ideas lets you browse through hundreds of science fair project ideas. 2  If Your Teacher Assigned a Specific Area for your science fair project (like biology or earth science), then you should go to Science Fair Project Ideas. If you can't measure the results of your experiment, you're not doing science! 2  You must be able to control other factors that might influence your experiment, so that you can do a fair test. 3  A fair test occurs when you change only one factor (variable) and keep all other conditions the same.