1. The expanse he called 'sky' (6-8)
On the second day, God stretched out the sky and made the atmosphere. Perhaps the waters above were the clouds. How delicately God balanced the oxygen, nitrogen, CO2 and all the components of the air so that the atmosphere could sustain life and support birds in flight. The water below the sky was ready to be filled with fish. So God prepared the environment for his work of filling on the 5th day.
2. The dry ground he called 'land' (9-13)
On the third day God spoke and the water under the sky gathered to one place; the dry land appeared, and God saw that it was good. Then God commanded all kind of vegetation to grow out of the ground. Plants and trees bore fruit with seed in it according to their kinds. So God made a beautiful and orderly world. It was ready for animal inhabitants and for mankind. God saw that it was good. He created the world for his glory and for man's happiness; God is good.
Application: Father, thank you for creating a beautiful world, a world made for your glory and our highest good.
One Word: The heavens declare his glory