Boundary 1.2. WP __ Closed system 1.3. WP __ Control volume 1.4. WP __ Extensive property 1.5. WP __ Intensive property 1.6. WP __ Process 1.7. WP __ Property 1.8. WP __ State 1.9. WP __ Surroundings 1.10. WP __ System A. The condition of a system as described by its properties B. A region of space through which mass may flow C. Whatever is studied D. A transformation from one state to another E. A property whose value for an overall system is the sum of its values for the parts into which the system is divided F. Everything external to the system G. A fixed quantity of matter H. A property whose value is independent of the size or extent of a system and may vary from place to place within the system at any moment I. Distinguishes the system from its surroundings J. A macroscopic characteristic of a system to which a numerical value can be assigned at a given time without knowledge of the previous behavior of the system