Across
- 2. The study of energy
- 6. The essence of our existence
- 7. All matter and energy regarded as a whole
- 9. Measured in joules
Down
- 1. Part of the universe being studied and observed
- 2. Measure of the kinetic energy of the particles
- 3. Energy absorbed by products
- 4. Energy released by reactants
- 5. Everything outside of the system
- 8. Potential energy change of a system during a chemical or physical change