The lower boundary of the exosphere is called the exobase. It is also called exopause and 'critical altitude' as this is the altitude where barometric conditions no longer apply. Atmospheric temperature becomes nearly a constant above this altitude.
Sodium â the volatility and solvent mineral: essential to life, all body fluids contain sodium â itâs needed for many biochemical processes including water balance regulation, fluid distribution on either side of the cell walls, muscle contraction and expansion, nerve stimulation and acid-alkaline balance.
2. Water in fractures and pores generally reduces the strength. of rocks and clay-bearing soils. It promotes mass movement. because it is under pressure, which tends to push apart. individual grains and open joints and bedding planes. 3. Helps to widen joints and bedding planes by dissolving. soluble minerals.