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.
The Senior Pass replaces the Golden Age Passport and is for citizens or permanent residents of the United States, who are 62 years of age or older. It provides access to, and use of, any Federal recreation site that charges an Entrance or Standard Amenity Fee, and provides a discount on some Expanded Amenity Fees.he cost of the Senior Pass is $10, and it is valid for the lifetime of the pass holder. Photo identification may be requested to verify pass ownership. Existing plastic Golden Age Passports are valid for a lifetime.