A system that allows the movement of energy and matter across its boundaries?

A system that allows the movement of energy and matter across its boundaries?

• A. Open System
• B. Closed System
• C. Groundwater Flow
• D. Infiltration

Answer: (A)

The essential idea is how a system interacts with its surroundings through its boundaries. An open system is one that exchanges both energy and matter across those boundaries. In hydrology, a watershed behaves this way: rainfall and runoff move water across the system’s boundaries, evaporation and transpiration transfer energy, and groundwater can flow in or out as well. All of these transfers show matter and energy crossing the boundary of the system. A closed system, by contrast, would exchange energy but not matter, which doesn’t fit natural hydrologic setups where water itself moves across boundaries. The other terms—groundwater flow and infiltration—describe processes that occur within or at the boundaries of a system, not the classification of the boundary exchange itself. They illustrate parts of the open-system behavior but don’t define the system type on their own. So, the system that allows movement of energy and matter across its boundaries is an open system.

The essential idea is how a system interacts with its surroundings through its boundaries. An open system is one that exchanges both energy and matter across those boundaries. In hydrology, a watershed behaves this way: rainfall and runoff move water across the system’s boundaries, evaporation and transpiration transfer energy, and groundwater can flow in or out as well. All of these transfers show matter and energy crossing the boundary of the system.

A closed system, by contrast, would exchange energy but not matter, which doesn’t fit natural hydrologic setups where water itself moves across boundaries. The other terms—groundwater flow and infiltration—describe processes that occur within or at the boundaries of a system, not the classification of the boundary exchange itself. They illustrate parts of the open-system behavior but don’t define the system type on their own.

So, the system that allows movement of energy and matter across its boundaries is an open system.