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.
The prime candidate for WO has 5 - 8 years of active federal service (AFS) and meets all other prerequisites. You can apply regardless of AFS but require a waiver if you have 12 years or more of AFS. The standard for approving an AFS waiver is more stringent than for a prerequisite waiver.