Why is the moon grey in some parts and white in the other?

Question

Especially in the full moon, when I see it, half of it is grey and the other half white.

Answer 1

It's just the chemical composition. The dark stuff is solidified lava and the brighter stuff are rocks in the highlands. Here's a pretty good explanation. ...

http://csep10.phys.utk.edu/astr161/lect/moon/moon_surface.html

Answer 2

The parts which are seen darker or grey in colour are the deep holes or craters on the moon surface but the parts which are seen lighter or white in colour are the plain surface on the moon....

Answer 3

the white part is lunar dust. its basicly "moon dirt" the darker parts are the remnants of lakes of lava that once covered the moon and some of the smaller dark places are the pits of craters.

Answer 4

The "white" part is illumination directly from the sun. The "grey" part is indirect illumination by the sun, reflected off the earth. The reflected light from the earth is called the earth's "albedo".

See Wikipedia, the free, online encyclopedia at:
http://en.wikipedia.org/wiki/Albedo
and,
http://en.wikipedia.org/wiki/Earthshine#Earthshine

Hope this helps!