1. What do you call the energy possessed by a substance at the particle level? A. Heat C. System B. Internal Energy D. Work 2. Which is also known as energy in transit? A. Heat C. System B. Internal Energy D. Work 3. Which is true about the internal energy of a system? I. It increases when heat is added. II. It increases when heat is removed. III. It increases when work is done by the system IV. It increases when work is done on the system. A. I