How long does it take the moon to go from full-moon phase to new-moon phase?

Two weeks or, more precisely, about one half of the synodic period of 29.53 days

It's probably because some types of violets are blue

Aregion is an area of land that has common features. these features can be natural, such as climate or landscape. they can also be artificial, such as language or religion. the xinjiang uyghur autonomous region, above, is an area of china inhabited by uyghurs, a muslim group with ethnic ties to turkish people.