Question

The diagram below shows the flow of nutrients and materials in a prairie ecosystem.

If the ecosystem is a closed system, which of these things does not change as it cycles through the ecosystem?
A.
the form of matter
B.
the location of matter
C.
the total amount of matter
D.
all of these

Answer 1

C. In a closed system matter is conserved — the total amount stays the same. Its form (chemical compounds) and location can change as it cycles through producers, consumers, and decomposers.