You will learn and practice how to: 1  determine thunderstorm base, top, and the trigger needed to get the storm started. 2  identify the boundary layer, cap, troposphere, tropopause, and stratosphere. 3  use the thermo diagram to help calculate various humidities. 4  determine temperature change of vertically moving air parcels.
The term ''immediate precursor'' means a substance 1  -. (A) which the Attorney General has found to be and by regulation designated as being the principal compound used, or produced primarily for use, in the manufacture of a controlled substance; (B) which is an immediate chemical intermediary used or likely to be used in the manufacture of such controlled substance; and.
2. One that precedes another; a forerunner or predecessor: The new principal's precursor was an eminent educator. 3. A biochemical substance, such as an intermediate compound in a chain of enzymatic reactions, from which a more stable or definitive product is formed: a precursor of insulin.recursor. n. 1. a person or thing that precedes and shows or announces someone or something to come; harbinger. 2. a predecessor or forerunner. 3. (Chemistry) a chemical substance that gives rise to another more important substance.