Genesis 1:6 – 8 | “And God said, “Let there be an expanse between the waters to separate water from water.” So, God made the expanse and separated the water under the expanse from the water above it. And it was so. God called the expanse “Sky”. And there was evening, and there was morning – the second day.”
This verse does not on the surface appear to have a lot of significance other than the fact that we now have a planet covered in water, and surrounded by sky with an outer belt of water. This becomes more important later in Genesis when we look at the flood. Young earth creationist believe that there was a water canopy that kept the earth in a constant tropical green house. It is an interesting theory that could have caused the earth to remain a constant temperature and humidity in every region. We were not there, so the theory is really only as good as any theory we have today.
One common aspect of creation, is we again see the definition of a 24-hour day, and God approving of his work. God made it a point to make sure we knew these days were literal days. It is important that we understand this to really appreciate God’s absolute power. God is so powerful, that he can create oceans, and sky in a single day. What God made, he made beautiful for you and me. God only wants us to love him in return.