Across
- 1. the part of the universe being studied and observed
- 2. when energy is absorbed
- 5. all existing matter and space considered as a whole
- 6. the study of energy involved in reactions
- 8. a statement published by a Swiss born, Russian chemist in 1840
- 9. heat content of a system
Down
- 1. everything in the universe outside the system
- 3. measured in joules
- 4. available power
- 7. when energy is released