Across
- 3. system releases energy to the surroundings
- 7. substance changes from a gas directly to a solid
- 8. state of matter-definite volume, no definite shape
- 10. atoms of the same element with different number of neutrons
- 12. substance changes from a solid to a liquid
- 13. substance changes from a liquid to a gas
- 16. positively charged subatomic particle
- 17. state of matter-low level of kinetic energy and fixed volume
- 18. state of matter-high level of kinetic energy and variable shape
Down
- 1. subatomic particle with mass so small it is insignificant
- 2. substance changes from a liquid to a solid
- 4. substance changes from a gas to a liquid
- 5. system absorbs energy to the surroundings
- 6. substance changes from a solid directly to a gas
- 9. __ level: possible energy that electrons of an atom have
- 11. subatomic particle found in nucleus with protons
- 14. __ number: the number of protons in an atom
- 15. __ number: the number of protons and neutrons in an atom