You can try refuting flat earth with science and technology etc, in my Conspiracy thread. This thread is for scriptures and Bible related posts, images and videos.
If you can show a globe or a ball shaped earth that flies millions of miles per hour through endless "outer space" while spinning over a thousand miles per hour and going around the sun, feel free.
No offense, but the Bible doesn't mention bacteria, single-celled organisms, air being a combination of oxygen and nitrogen, trees feeding via photosynthesis through their leaves, etc., etc., etc.
The absence of evidence is not the evidence of absence. The Bible doesn't mention its spherical shape. That doesn't mean it isn't spherical. There are some things the Bible simply doesn't need to teach us relative to our moral existence, which is its primary focus.
And there are a few simple things that entirely destroy this flat earth nonsense. And it
is nonsense.
1) Lunar eclipses are 100% predictable, right down to the minute they will start and end, the magnitude, whether full, partial, penumbral, and where in the sky they will occur, no matter what part of the earth you view it from, if it's visible from your location at all. The reason they are predictable with this level of accuracy is that we know the cause of lunar eclipses, the size and shape of the earth, moon, and sun. We know the distances of the moon and sun from the earth. We know the orbit and speed of the moon around the earth, as well as that of the earth around the sun in our heliocentric solar system.
Because we know these things, we can predict a lunar eclipse a thousand years in advance with no margin of error whatsoever.
The flat earth theory can't even explain such an occurrence in a credible way, much less predict one.
2) Stars and constellations are not all visible along the same points of latitude. What's visible from Maine is not visible in southern Chile. Given the model of the flat earth and the proposed motion of the sun above it, if the earth were flat, night and day would occur simultaneously in both places, and a flat surface would allow visibility of all the same stars. This is simply not the case.
3) Polar days and nights, which we know occur, would be impossible given the circumference of the sun's light footprint in the proposed flat earth model. The sun would have to corkscrew to the center, and then back out again, resulting in equatorial level temperatures in the north and south poles during the two phases of the polar nights and days. For the sun to be far enough away to allow a perpetual night in one pole or the other, its point of fullest intensity would have to be on the opposite pole. Any other model would fail to provide an equidistant sunrise and sunset. And equatorial temperatures at the poles would melt them in short order.
But a correct spherical model of the earth with a sun that is 92.96 million miles away allows equidistant sunrises and sunsets simultaneous to a polar day or night due to the tilted axis of our sphere, while maintaining the full intensity of the sun's light and heat at the known and established equator.
There are many more things that disprove a flat earth model beyond reproach. It's hogwash, and it shouldn't be taught. It takes away from the gospel, which is what we should be teaching and preaching.