Just before the last part is gone, what is it called?
It is called the Old Moon.
How long is it from one full moon to another full moon?
It is a lunar month.
How many full moons are there in a year?
There are thirteen full moons in a year.
Is the sun much larger than the moon?
The sun is many thousand times larger than the moon.
Why does the moon appear nearly as large as the sun?
Because it is so much nearer to us.