Job 28:24-25

"For he looketh to the ends of the earth, and seeth under the whole heaven; To make the weight for the winds; and he weigheth the waters by measure." (Job 28:24-25)
 
It was only discovered by scientists in modern times that the air actually has weight. This passage in Job, however, written thirty-five or more centuries ago, indicated that the two great terrestrial fluids of air and water forming earth's atmosphere and hydrosphere are both "weighed" by God's careful "measure" to provide the right worldwide balance of forces for life on earth.
 
Another remarkable "weighing" act of God is noted in Job 37:16. "Dost thou know the balancings of the clouds, the wondrous works of him which is perfect in knowledge?" Clouds are composed of liquid drops of water, not water vapor, and water is heavier than air, so how are they "balanced" in the sky? "For he maketh small the drops of water: they pour down rain according to the vapour thereof: Which the clouds do drop and distill upon man abundantly