chemistry crossword

1. a fourth state of matter
6. a change from a liquid to a gas
10. compound when two non-metals combine
13. when oxygen reacts with a substance to form a new substance and give off energy
15. compounds are pure substances consisting of at least one metal and one non-metal
18. a change from a gas to a liquid
20. have both metallic and non-metallic properties
21. the amount of mass in a given volume of substance
23. properties used to identify matter ex- color and luster
24. point changes from a solid to liquid

1. change its appearance or state may be altered,but its composition stays the same
2. substances ability to resist being scratched
3. substance that help a reaction proceed faster
4. is a material that cannot be broken down into any simpler substance
5. is the ability of a substance to conduct electricity or heat
7. mass is the mass or one atom or an element
8. respiration a chemical reaction that takes place in the cells in your body
9. chemical reaction that releases heat energy
11. a slow chemical change that occurs when oxygen in the air reacts with a metal
12. substance that can be pounded or rolled into sheets
14. mixture different substances that make up the mixture are visible
16. any solid that can be stretched into a long wire
17. chemical reaction that absorbs heat energy
19. the ability of a substance to be dissolved in another
22. point changes from a liquid to a gas