Nothing.
Those are human terms & arbitrary.
Rain sinks into the surface of the Earth where it can. There is no bottom or top to the Earth since it continuously spins on its axis.
Surveyors
Southern Hemisphere
South Pole
The bottom of the Earth. :)
The North and South Poles.
there things on planet earth
The maker's mark.
the marks have to be pointing each other in the center of the gears
Everyone is 'attracted' to Earth because of gravity. And there is really no bottom of the Earth.
it marks the end of the 10th year on earth because your first birthday marks the end of your first year on earth and it continues from there.
The Earth doesn't have a top or a bottom because it spins on its axis always changing the top or the bottom
On your top and bottom pulleys ,you have timing marks,they should line up when time is correct.
The North Pole.
Date of manufacture and location
Rain sinks into the surface of the Earth where it can. There is no bottom or top to the Earth since it continuously spins on its axis.
Antartica