Across
- 3. a mixture in which elements are not uniformly spread out
- 6. does not depend on the amount of matter present
- 8. temperature at which all three states of matter may exist
- 12. An atoms or group of atoms that can have a positive or negative
- 14. energy is released
- 16. observation made with a measuring instrument
- 18. an atom or group of atoms with a positive charge
- 19. matter and energy flow in and out of the system
- 21. a substance made up of two or more elements
- 22. distance between two crests
- 23. takes up space
Down
- 1. depends on amount of matter present
- 2. energy required to change the temperature of a system
- 4. a mixture in which elements are uniformly spread out
- 5. how efficient the solution will be
- 7. define the space of the system
- 9. all matter and energy is contained within the system
- 10. descriptive
- 11. manage the inputs and outputs of a system
- 13. must have 8 valence electrons in its outer shell
- 15. matter made up of two or more different substances
- 17. an atom or group of atoms with a negative charge
- 18. limitations of a design
- 20. energy is absorbed