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.
Plastic Golden Age Passports are valid for a lifetime. However, if you do want the new Senior Pass, you may purchase one for $10, with proof of identification (e.g., driver's license, birth certificate, or similar government-issued document).lastic Golden Age Passports are valid for a lifetime. However, if you do want the new Senior Pass, you may purchase one for $10, with proof of identification (e.g., driver's license, birth certificate, or similar government-issued document).
A: Minors between 15 to 18 years of age can apply either for a 10-year validity passport or they can apply for a passport, which is valid till they attain the age of 18 years. Fee for a 10-year validity passport is higher than fee for a passport, which is valid till they attain the age of 18 years.n case of minors, the validity of passport is restricted to 5 years or till they attain the age of 18, whichever is earlier. But the minors between 15 to 18 years of age can apply either for a 10-year validity passport or for a passport which is valid till they attain the age of 18 years.