As the moon revolves around the earth, it also rotates on its axis. why is it that the the same side of the moon is always visible from earth?
a. the moon does not have a day and night cycle.
b. that side of the moon only faces away from earth during the daytime.
c. the speed of the moon's rotation keeps the same side always facing earth.
d. the earth's gravity attracts one side of the moon more than the other.

The moon dosent revolve around earth as the earth rotates the moon stays in the same place

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -