Conducting a fair test is one of the most important ingredients of doing good, scientifically valuable experiments. To insure that your experiment is a fair test, you must change only one factor at a time while keeping all other conditions the same. Scientists call the changing factors in an experiment variables.
Eligibility Requirements for VFW Auxiliary Membership: Members must be citizens of the United States or a United States National, and at least 16 years old.
Eligibility Requirements. 1  Be a minimum of 18 years of age. 2  Successful completion of all initial training requirements for each registration category, including firearms endorsement if applicable. 3  Be a United States citizen or legal resident alien of the United States.