Why is it not always to represent the natural world with models?
a. a model can have only two things in it.
b. a model cannot always show all real0life conditions.
c. models must always be much smaller than the natural system.

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere