Which of these best describes a scientific model? A) the most recent version of a theory
B) a detailed description of a natural event
C) a way of explaining a complex concept D) a small version of a large object

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

the correct answer is:

a. formation of precipitation