1. 1. Matter that always has exactly the same composition is
A) a heterogeneous mixture.
B) a homogeneous mixture.
C) a solution.
D) a pure substance.

2. Correct !!
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3. B) homogeneous mixture. C) suspension. D) compound.
2. A mixture with parts that are so evenly distributed that it is difficult to distinguish one substance from another is a
A) colloid.
B) homogeneous mixture.
C) suspension.
D) compound.

4. Correct !!
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5. 3. A substance that cannot be broken down into simpler substances is
A) a compound.
B) an element.
C) a solution.
D) a mixture.

6. Correct !!
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7. 4. Two examples of pure substances are
A) copper and soda.
B) air and water.
C) aluminum and table salt.
D) tap water and oxygen.

8. Correct !!
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9. 5. If a substance must be shaken before use it would most likely be
A) a compound.
B) an element.
C) a colloid.
D) a suspension.

10. Correct !!
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11. 6. Which of the following is a false statement.
A) The particles of a solution are the smallest of heterogeneous mixtures.
B) The particles of a suspension settle out over time.
C) The particles of a colloid settle out over time.
D) The size of the particles of a colloid are between the size of those found in solutions and suspensions.

12. Correct !!
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13. 7. Which of the following is a compound?
A) Si
B) KI
C) Bi
D) Li

14. Correct !!
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15. 8. Sand is an example of a A) compound. B) homogeneous mixture.
C) solution.
D) heterogeneous mixture.

16. Correct !!
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17. 9. The symbol for silver is
A) Ag
B) AG
C) ag

18. Correct !!
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19. 10. Coffee is an example of
A) an element.
B) a compound.
C) a homogeneous mixture.
D) a colloid.

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21. 11. Which of the following is an example of a homogeneous mixture?
B) tap water
C) gold
D) a can of mixed nuts

22. Correct !!
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23. 12. According to the table, nitrogen would be a liquid at
B) -194°C
C) -196°C

24. Correct !!
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25. 13. All are physical properties except
A) hardness.
B) viscosity.
C) density.
D) reactivity.

26. Correct !!
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27. 14. The type of change in which the composition of the material changes chemically is a
A) physical change.
B) chemical change.

28. Correct !!
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29. 15. Which of the following is not evidence that a chemical change may have occurred?
A) formation of a precipitate
B) change of shape
C) formation of a gas
D) change of color

30. Correct !!
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31. 16. A solid has a high melting point, is hard and malleable is most likely to be
A) glass.
B) putty.
C) iron.
D) plastic.

32. Correct !!
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33. 17. Since both have particles small enough to pass through paper, the method used to separate two liquids is
A) distillation.
B) filtration.

34. Correct !!
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35. 18. A material’s resistance to flow is
A) conductivity.
B) viscosity.
C) hardness.
D)malleability.

36. Correct !!
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