Across
- 1. closed system
- 6. malleability
- 7. chemical change
- 9. element
- 12. open system
- 14. flammability
- 17. ductility
- 18. luster
- 19. exothermic reaction
- 20. matter
Down
- 2. solubility
- 3. heterogeneous mixture
- 4. substance pure substance
- 5. mixture
- 8. homogeneous mixture
- 10. physical change
- 11. Insoluble
- 13. endothermic reaction
- 15. solution
- 16. compound