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.
Requirements for Using the Visa Waiver Program (VWP) Citizen or National of VWP Designated Country*. Citizens or nationals of the following countries* are currently eligible to travel to the United States under the VWP, unless citizens of one of these countries are also a national of Iraq, Iran, Syria, or Sudan.