We find this in Genesis 1:6-8 (NIV) And God said, “Let there be an expanse between the waters to separate water from water.” 7 So God made the expanse and separated the water under the expanse from the water above it. And it was so. 8 God called the expanse “sky.” And there was evening, and there was morning—the second day. But God did NOT say: “It was good”
The creation story is interesting reading. God takes a whole day out His busy schedule of creation just to form an environment with water in all its forms in what we call the atmosphere or “sky”. He has yet to create life. Could it be, that water in all its forms are necessary to form and sustain life, so a sustainable ecosystem had to be prepared first?
God created the earth too be just heavy enough to hold on to water vapor, and water is unique because its melting point and boiling point is within the range of bring able to participate in sustaining life. It also has the second (after ammonia) highest specific heat capacity of all known substances. To melt 1 gram of ice takes 80 calories, to heat it takes 1 calorie per gram and to boil it at ground levels takes 539 calories. (The calories you eat are actually kilo-calories). This makes water the ideal substance to moderate and regulate climate. Water vapor evaporates from the ocean, cooling it down and water vapor, being lighter than air rises and condenses as clouds form. The clouds are the most important temperature regulator, much more important than all other greenhouse gases combined. Clouds transport heat from the equator to the temperate areas and to the poles. Without this the equator temperature would be in excess of 145 F. In addition clouds have a high reflection of incoming sunlight, reflecting incoming heat back into space. The earth has never been to warm to sustain complicated life, nor is there any danger of overheating unless clouds disappear. In fact, the next major climate change is the next ice age.
The picture above shows the friendly earth we are living in today. On the second “day” of creation situation was quite different. The sun was not fully created yet, and the earth was still in its chaotic state. All God did was to prepare the ecosystem. The earth was still cooling down from creation, and water evaporated and formed a cloud that covered the whole earth. This is why God did NOT say “it was good” on the second day, it was just the preparation.
Next: The creation of life.
Len Bilén's blog, a blog about faith, politics and the environment. 