THE TREE DOES NOT MAKE A SOUND
Basic Philosophy lessons teaches you that...gawd...it makes the air molecules move in the exact same way, but does not make the sound there, sound is a sense created in our brains, nothing more
The same with colours don't exist full stop...It's just wavelengths of light
EDIT:
OMG at the guy who said record there!
It doesn't mean that just because there isn't anyone there it wont make a sound...it still would make the sound if there was someone there, but as there isn't, 'sound' isn't heard, just everything else is the same. If it were to be recorded, then yes it obviously would seem to make a sound, as then you would hear it seperatly.....some people just cannot grasp the idea that it DOES NOT MAKE A SOUND!!!
It's so difficult to explain typing..