Mr. Wagner Earth Science (Why is The Earth Round?)
Reason 2
A star will change directions when you move (i.e if the star is above you and you move forward, the star will be behind you.)
Reason 1
As a ship goes farther away from you, the bottom of the ship disappears first which can be inferred that the Earth is round.
Reason 5( Observation)
The earth is round from pictures in space
Reason 4
The shadow on the moon during an eclipse is round.
Reason 3
Your weight on Earth is almost the same around the whole place. This is because you are almost (earth has a bulge at the equator) the same distance away from the center meaning that the force of gravity is almost the same.