Question

the flow of matter such as water, carbon, nitrogen, phosphorus and oxygen are finite (we only have so much). therefore, it must be re - used and cycled through abiotic and biotic parts of an ecosystem. this is considered a _______________, because the matter is finite (no matter is added to or taken out of the system). closed system open system rewatch

Explanation:

In a closed system, matter is neither created nor destroyed within the system boundaries. Since the flow of water, carbon, nitrogen, phosphorus and oxygen is finite and no matter is added or taken out of the ecosystem - like system described, it fits the definition of a closed system. In an open system, matter can be exchanged with the surroundings.

Answer:

closed system