An Unhealthy pH Level. Tooth decay can occur when the pH level in the mouth is 5.5. For reference, the neutral level is 7.0. When we consume acidic foods and drinks, the pH within the mouth decreases and can cause the pH in the dental plaque to fall rapidly below 5.0.
The Senior Pass is a lifetime entrance pass to United States national parks for those 62 years and older. To obtain this a senior citizen need only go to any National Park Service facility that charges an entrance fee with the following: 1  Proof of age (must be 62 years or older).he Senior Pass provides a 50 percent discount on some Expanded Amenity Fees charged for facilities and services such as camping, swimming, boat launch, and specialized interpretive services. In some cases where Expanded Amenity Fees are charged, only the pass holder will be given the 50 percent price reduction.
Minor passports that are issued to U.S. citizens who are 15 years of age and younger are valid for five years. A limited passport is a US passport valid for less than the full 10 years for an adult passport or the full five years for a passport issued to a minor. These are generally used for emergency travel when all of the proper documentation cannot be provided at the time of application.