Thematic Bible: Second day, making the firmament or atmosphere, and separating the waters

And God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters. And God made the firmament; and divided the waters which were under the firmament from the waters which were above the firmament: and it was so. And God called the firmament Heaven: and the evening and the morning were the second day.