Systems encountered in nature at Earthʹs surface,such as a forest,are
A)open systems in terms of matter.
B)closed systems in terms of energy.
C)open systems in terms of energy.
D)both open systems in terms of energy and open systems in terms of matter.
E)both closed systems in terms of energy and open systems in terms of matter.

Question

Quizplus · Accepted Answer

Natural systems at Earth's surface, such as a forest, are open systems in terms of both energy and matter. Energy flows into the system through sunlight and is transformed by photosynthesis, and matter is exchanged with the atmosphere and soil through processes such as respiration and nutrient cycling. Therefore, choice D is the best answer.

Systems Encountered in Nature at Earthʹs Surface,such as a Forest,are