The first one is the six-day one:
- [*}Day 1: God creates celestial environments: day and night
- Day 2: God creates far-terrestrial environments: sky and oceans
- Day 3: God creates near-terrestrial environments: land and plants
- Day 4: God creates celestial inhabitants: the Sun, the Moon, and the stars
- Day 5: God creates far-terrestrial inhabitants: aquatic animals and flying animals
- Day 6: God creates near-terrestrial inhabitants: land animals and humanity
- Day 7: God is finished creating, and he takes the first day off in the history of the Universe
The second one is the Adam-and-Eve one:
- God creates land and plants
- God creates the first man, Adam, from the soil
- Adam is lonely
- God creates animals for him
- Adam is still lonely
- God creates the first woman, Eve, from Adam's rib or side
- Adam is less lonely
- A certain mischievous snake convinces Adam and Eve to eat a certain no-no-fruit, and God kicks all three out of the garden that they were in
In the Documentary Hypothesis or JEDP Hypothesis, the first story comes from the P or priestly source and the second from the J or Yahwistic source (the J is a German spelling). The others are E or Elohistic and D or Deuteronomistic.
These two very different stories are often retconned together by supposing the second one to be what happened when God created humanity in the first one.
The first one is a rather obvious charter myth for the Sabbath, since it presents God as observing a Sabbath after six days of work.
The second one has an origin myth or "Just So Story" for why snakes crawl on their bellies -- it is because some ancestral snake was being punished for its misbehavior.