Across
- 2. different substance after change, cannot get back
- 3. number of protons, smaller number
- 4. heat enters, temperature decreases
- 7. negative charge, outside nucleus
- 8. protons + neutrons, larger number
Down
- 1. same substance after change, can get back
- 4. heat exits, temperature increases
- 5. no charge, in nucleus
- 6. positive charge, in nucleus