  In the work it has been shown that there are two types of the conservation
laws.
  1. The conservation laws that can be called exact ones. They point to an
avalability of some conservative quantities or objects. Such objects are the
physical structures, which the physical fields and relevant manifolds are
constructed of. These are conservation laws for physical fields.
  2. The conservation laws of energy, linear and angular momentum, and mass.
These laws are conservation laws for material systems (material media). They
establish a balance between changes of physical quantities and external
actions. Such conservation laws can be called as balance ones. It has been
shown that the exact and balance conservation laws execute a relation between
the physical structures, which form physical fields, and material systems. The
physical structures, to which the exact conservation laws correspond, are
generated by material systems in the evolutionary processes, whose moving force
is the noncommutativity of the balance conservation laws. These results are
obtained with the help of the mathematical apparatus of skew-symmetric
differential forms.
