Topic 3 ? Thermal physics Formative Assessment PROBLEM SET NAME: ________________________________ TEAM:__ THIS IS A PRACTICE ASSESSMENT. Show formulas, substitutions, answers, and units! Topic 3.1 ? Thermal concepts [ NGSS Supplement to Topic 3.1 begins at problem 51... ] The following questions are about internal energy. 1. What are the two forms of internal energy? 2. Suppose a liquid?s starting temperature is 20(C and its ending temperature is 35(C. Explain what happens to each form of internal energy. 3. How can you tell if the internal potential energy of a substance has changed? 4. How can you tell if the internal kinetic energy of a substance has changed? The following questions are about temperature scales.