Across
- 1. the measurement for force
- 3. type of radiation
- 5. something that can be possitive or negative
- 7. the rate of change of speed
- 9. the measured unit in energy
- 11. rate of flow of charge
- 12. the change from liquid to solid
Down
- 2. the change from solid to gas
- 4. contains the neutrons and protons
- 6. the time it takes for radio actiity to decrease by half
- 8. hot air becomes less dense and cold air replaces it
- 10. particals that are closely compacted