What are two piceds of evdence that establish eath spherical shape?

Answer 1

This is an interesting question, because it is a relatively recent misconception that is now universally accepted to be false. It seems trivial to address but reasoning on this level provides a good template for discussion more complex questions, such as our origins and theology itself, so as an exercise I will address it seriously.

There are probably many more reasons, but some of the easiest are:

1) For any given period of the year and at a fixed latitude and on a relatively flat region of the earth, the sun rises at a time directly in proportion to the longitude at which the observer is standing. This could only occur if the equator formed a circle.

2) The time taken to traverse the earth at a given latitude (ie. following "east" or "west" on a compass) progressively decreases as you approach the poles.

3) The earth is round when you look at it (we have photos).

4) Any mass which acts as a fluid would, in theory, tend towards a spherical shape under gravity as it minimizes gravitational potential. This is the reason other planets are round, and it stands to reason our own is subject to the same phenomenon.

Occam's razor could be applied at this point to conclude that the earth is best described as a sphere.