1 Air-Altitude, Density and Specific Volume-The density and the specific volume of air varies with elevation above sea level.  Tag Search.
What is the natural process that causes rocks to break down? Weathering from mechanical and chemical means is the process that causes rocks to become smaller and smaller; wind, rain, the sun, the freeze/thaw cycle, moving glaciers, chem â¦ ical reactions, and gravity are some of the causes of weathering.
cracks causes the rock to break apart. Plant roots that grow in the cracks of rocks and animals that burrow beneath the ground are also agents of physical weathering. As a plant grows,its roots invade the crevices of a rock and hold them open.When animals burrow, they ex-pose new rock surfaces to weathering. When ï¬owing water in a stream carries rock