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 total amount of matter
B.
the form of matter
C.
the location of matter
D.
all of these

Answers

GPT-4o mini
In a closed system, the total amount of matter remains constant as it cycles through the ecosystem. Therefore, the correct answer is:

**A. the total amount of matter**

While the form (B) and location (C) of matter may change as it cycles through the ecosystem, the total amount of matter does not change. Thus, the answer is not D. all of these.