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2. All matter can be classified as mixtures and ______.

3. Pure Substances

4. A substance made of 2 or more elements.

5. compound

6. A) Milk B) Copper C) Granite D) Chicken noodle soup Which one is a pure substance?

7. B) Copper

8. made of 2 or more elements, can not be separated by physical means and is classified as a pure substance.

9. Compounds

10. The quantity or the amount of matter present

11. mass

12. The process of changing from a gas to a liquid

13. condensation

14. The process of changing a liquid to a gas

15. vaporization

16. List the phases of water (in order), from slowest molecular motion to fastest

17. solid-liquid-gas

18. Vaporization that takes place at the surface of a liquid

19. evaporation

20. The temperature at which a solid changes to a liquid

21. Melting point

22. The boiling point of water

23. 100ºC

24. The ability to be drawn into a wire

25. ductile

26. The physical property that describes how light reflects off a substance

27. luster

28. The “thickness” of a liquid or the resistance to flow in a liquid

29. Viscosity

30. The ability to be pounded into a sheet by metals

31. malleable

32. A solid formed by the reaction of 2 liquids

33. precipitate

34. The energy needed to start an exothermic reaction

35. Activation energy

36. A substance used that lowers the amount of activation energy needed to start an exothermic reaction

37. catalyst

38. The type of change indicated by a change in color

39. chemical

40. A reaction that requires energy to be put in to continue the reaction

41. Endothermic reaction

42. Burning, combustion and explosions are type of _____________ reactions.

43. exothermic

44. A substance has a volume of 3.0 cm 3 and a mass of 18 grams. What is its density?

45. 6.0 g/cm 3

46. The graph show the energy change of an __________ reaction.

47. exothermic

48. A reaction with oxygen

49. oxidation

50. The substance being dissolved in a solution.

51. solute