It might not seem like it, but the air has weight. Anything with mass has weight, and we know air has mass because (for example) we can feel it when the wind blows. It was once thought that air was weightless. Yet 4,000 years ago Bible declared that God established a weight for the wind. For this, please read below Job Chapter 28 verse 25
Job 28: 24-25: For he looketh to the ends of the earth, and seeth under the whole heaven;24 To make the weight for the winds; and he weigheth the waters by measure.25 When he made a decree for the rain, and a way for the lightning of the thunder. 26 (KJV)
The total weight of the atmosphere exerts a pressure of about 14.7 pounds per square inch at sea level. We don’t notice this weight, however, because we are used to it. If we live at the top of Mount Everest, only 30% of the atmosphere lies above us, leaving an air pressure of only 4.4 pounds per square inch.
Many centuries ago, Job wrote 28:25 “When He imparted weight to the wind and meted out the waters by measure” (NASB). In fact, the relative weights of air and water are needed for the efficient functioning of the world’s hydrologic cycle. Although this cycle pretty much sustains life on the earth, it wasn’t scientifically proven until only about 300 years ago.