Genesis 8

1 God uses evaporation to start the water receding.
2 The underground and aerial sources of water were probably depleted.
3 This was probably a time of mountain building where God raised the tall mountains and depressed the ocean floors so that excess water would flow into them, and off the land (Psa 104:5-9).
4 Again, the emphasis here is that these events have a time and place associated with them. They really happened.
7 The raven files around, probably within eyesight of the ark. It does not return, and Noah's experiment does not work.
8 This time, Noah chose a "clean" bird to examine the earth.
9 No trees were found to perch in yet, so the dove returned.
11 A week later, there were signs of plant life being established. The olive was a tree, but at this point, it was most likely a sapling (unless God caused plants to grow more quickly right after the Flood).
12 The dove found a home, and decided to stay there.
13 Noah opened the ark, but he did not go out until God told him to.
17 Everyone was to now leave the ark and refill the earth with animal life. The original command given during the days of creation was to be carried out by the remnant on the ark. It is as if creation were starting all over again. However, instead of a perfect world, they inherited a destroyed world. It was not the beginning -- it was starting over.
20 Noah offers sin and thanksgiving sacrifices.
21 This is not to say that God is appeased by offerings, but He knew that from this point forward, He would always have people who had a relationship with Him. Man was still affected by sin, but God's mercy would prevail as history continued to unfold.
22 The cycle of seasons would continue until the Last Day.