Is our earth round or flat give good reason

It is round because from space, it is a sphere. It might not seem like it from our point of view, but the gravity earth has makes us think that Earth is flat, but it is round. For example, if you walk on Neptune, which barely has any gravity, you could clearly see a round planet from space and from where you are standing (or floating). It is gravity that is the main cause of us thinking that the earth is flat, but it is round. Gravity is pushing the earth down, creating a sphere. I hope this information was useful.

Round. If you observe the rotational patterns of earth around the sun, and the moon around earth, you get your answer. If the earth were flat the moon wouldn't have phases like it does, and would be visible at all times because it would have no other place to go during the day. Also, if the earth were flat, time zones wouldn't be as they are.