1. Chemical property A property that describes the ability of a substance to react

2. Chemical bond The forces that join atoms to each other

3. element A substance made up of only one kind of atom

4. compound A substance made up of 2 or more different elements

5. Physical property A property that describes the characteristics of a substance that can be measured without changing the characteristics of the substance

6. solubility The ability to be dissolved

7. mixture A combination of 2 or more kinds of matter, each of which keeps its own physical properties

8. Change of state Occurs when heat is added to or taken away from a substance

9. melting Occurs when a solid becomes a liquid

10. evaporation Occurs when a liquid becomes a gas

11. condensation Occurs when a gas becomes a liquid

12. freezing Occurs when a liquid becomes a solid

13. Water H₂OH₂O

14. salt NaCl

15. sugar C ₆ H ₁₂ O ₆

16. Physical change A window breaking

17. Physical change Butter melting

18. Chemical change A nail rusting

19. Chemical change Paper burning

20. chemical Metal reacting

21. Physical change Water freezing

22. Chemical change Production of gas

23. 20 mL of water in a pie pan Which will evaporate 1 st ? 20 mL of water in a pie pan OR 20 mL of water in a glass

24. 3 mL of water at 60 ◦c Which will evaporate 1 st ? 3 mL of water at 60◦c OR 3 mL of water at 30 ◦c

25. 10 mL of water in the sun Which will evaporate 1 st ? 10 mL of water in the shade OR 10 mL of water in the sun

26. 15 mL of water in an area with low humidity Which will evaporate 1 st ? 15 mL of water in an area with high humidity OR 15 mL of water in an area of low humidity

27. 5 mL of water Which will evaporate 1 st ? 15 mL of water OR 5 mL of water