הָאָֽרֶץ׃ and אֶ֔רֶץ The difference between the planet earth and the crust that we call dry land. The first one being the whole, and the second one being a part of the whole.
but neither word means matter
It does not have to mean the same, both are made up of matter. The verse does not mean nor even define, that God created it a finished product. The point of saying that something was good/finished came later.
You would not say, " I made a metal". You would say, I made a gun". Gun does not mean metal, but metal is understood. Today you can print one from plastic. Gun does not mean plastic either. You could be verbose and let every one know that you created the metal, and all the tools required to fashion the gun, or the printer that printed the plastic and the plastic itself. Or you could just say I created a gun, and depending on what the gun looked like, they may assume all the details or ask you to explain them after they had already seen the finished product.
The Hebrews do seem to have an interesting term for rain though. Water that materializes. This incorporates the understanding that water and matter may be one in the same. When they say the ocean or deep referring to the abyss of Genesis, they may understand that the term used as water was actually the matter and makeup of the universe. They knew about the universe and matter. They called it the deep, or water. This could be why every one thought they were confused about the firmament and water on the 4th day. Instead of the spirit fluttering above an ocean of water, it could be an ocean of matter, or the universe. Not to mention the fact that if the whole universe was an ocean or water instead of matter, where did all the water go? I suppose being just hydrogen and oxygen, which is also the makeup of stars, then we could call a formless star water.
Genesis doesn't say God created matter and "the deep" in Gen 1:2 refers to the ocean
Genesis does not say that the God of the waters came out one day and said, Let there be light."
It says the very first thing God did was create the heavens and earth, not completed, but formless and void matter. Then said, Let there be light."
The deep does not mean ocean in this context. You have to have a formed planet to have an ocean. It meant the abyss or an endless amount of water. This is where you could compare it to the other myths. The name for God here could mean the God of the ocean or sea, and it could mean that he created everything from water. Or it could mean that he created water itself. I still hold as do a lot of humans through history that it is understood that God created the entire universe which has to include matter, and water, and all the gasses.
how can you argue heaven and earth is matter when neither was created on the 1st day?
The universe and earth are still matter today. Why argue they are not? The original Hebrew said that God created all things. During the time of Christ, they still held that God created all things. Why would that change even if science has figured out that all things are made up of atoms, and that atoms are made up of subatomic particles. All things means all things, even the subatomic particles.
the firmament is not air, its the hammered bracelet and is solid
The firmament is the atmosphere between two bodies of water with the earth in the center of one of them. The atmosphere is hardly solid, and it is fixed in it's position as a place encircling the earth. You cannot have the earth with no dry land appearing above the water, without that water encircling the earth. The Flood was not the first time the whole earth was covered in water. Unless the earth before the Flood was a flat disc and humans would fall off the underside if they dug through. Then the earth was a ball totally covered in water, and then there was an atmosphere of gas, and then more water, there is no other way to separate two bodies of water, and still have no dry land.
The firmament is sky or air.
The only other possibility is to separate the water with the earth's crust, so you have water, crust, water, but then you could not put light into the earth's crust, if that is the firmament. The wording IMO can lead to all sorts of science fiction tales. Flat earth with water under the earth, as the earth was floating on water even when it had oceans. Or there was a vast body of water around the whole solar system, or even the rest of the galaxy, or universe. At this point we could say a black hole in the middle of a vast ocean.
then why do the first 3 days have night and day?
Why would a human want to be any where in the universe without there being night and day? We need to have some down time. There was light the first day. According to the standard cosmology, there was also a period of darkness. God said that he separated the darkness from the light. The earth was still without form. It could not spin, until form was given to it. Call it gravity, or God, the earth took form during the next 60 hours of darkness, and then sunlight came through the water canopy, the atmosphere, and the plants started to produce oxygen. Unless you change the definition of formless, and void, then the earth had no form, and was void. Meaning a bunch of matter with huge empty spaces next to an abyss full of water. Or a black hole in the middle of a universe full of water. There is a theory that the edge of the universe is a black hole. Even in space humans tend to synthesize periods of night and day.
the Earth didn't "form" until the 3rd day, therefore the Earth's sky didn't form until the 4th day - that doesn't tell us when the Sun formed
The earth was forming in the darkness between the evening or beginning of the second day and the dawn halfway through the fourth day. The light that dawned was not from any other place in the universe, other than a fully formed sun. Those plants needed sunshine to synthesize oxygen. The whole universe was forming at the same time. Why does formation have to be different in one section of the universe from any other section of the universe? According to observed phenomenon, the universe is homogenous. Even if things are happening differently locally it is all happening at the same time as every other part of the galaxy.
The discrepancy lays in the fact or notion that the oldest rock on earth is not as old as the universe allegedly is, so therefore, we will insert the solar system into a different time slot instead of at the beginning of time. I don't think we have samples of rock from across the universe to prove that each system has their own time stamp when they were inserted into the universe.