1. CST Review
Density

2. CST Review
Density

3. Page 74

4. CST Review Questions

5. How is density calculated?
IV. Density can be calculated using the
following formula:
Density = Mass
Volume
Density = g
mL

6. Mass
Volume
What is speed?
The density equation can be rewritten
to solve different types of density
problems.
Density =

7. Mass
Density Formula
You can rewrite the Density Formula
Density Volume

8. CST Review Questions

9. CST Review Questions

10. Mass
Volume
What is speed?
The density equation can be rewritten
to solve different types of density
problems.
Density =

11. Mass
Density Formula
You can rewrite the Density Formula
Density Volume

12. 5
CST Review Questions

13. 5
CST Review Questions

14. Mass
Density Formula
You can rewrite the Density Formula
Density Volume

15. Mass
Density Formula
You can rewrite the Density Formula
Density Volume

16. 5
CST Review Questions
Mass = Density X Volume

17. 5
CST Review Questions
Mass = Density X Volume
Brick MassA = ?
Brick MassB = ?
Air MassC = ?
Air MassD = ?

18. 5
CST Review Questions
Mass = Density X Volume
Brick MassA = 2000 X 2 = 4000
Brick MassB = ?
Air MassC = ?
Air MassD = ?

19. 5
CST Review Questions
Mass = Density X Volume
Brick MassA = 2000 X 2 = 4000
Brick MassB = 2000 X 4 = 8000
Air MassC = ?
Air MassD = ?

20. 5
CST Review Questions
Mass = Density X Volume
Brick MassA = 2000 X 2 = 4000
Brick MassB = 2000 X 4 = 8000
Air MassC = 1 X 6000 = 6000
Air MassD = ?

21. 5
CST Review Questions
Mass = Density X Volume
Brick MassA = 2000 X 2 = 4000
Brick MassB = 2000 X 4 = 8000
Air MassC = 1 X 6000 = 6000
Air MassD = 1 X 10000 = 10000

22. 5
CST Review Questions
Mass = Density X Volume
Brick MassA = 2000 X 2 = 4000
Brick MassB = 2000 X 4 = 8000
Air MassC = 1 X 6000 = 6000
Air MassD = 1 X 10000 = 10000

23. 5
CST Review Questions
Mass = Density X Volume
Brick MassA = 2000 X 2 = 4000
Brick MassB = 2000 X 4 = 8000
Air MassC = 1 X 6000 = 6000
Air MassD = 1 X 10000 = 10000

24. CST Review Questions
31

25. Why is density important?
V. Density determines what things will
sink and float in a given liquid.

26. CST Review Questions
31

27. CST Review Questions
31

28. 19
CST Review Questions

29. Why is density important?
A. If an object has LESS density
than the liquid it will FLOAT.
The ball has LESS
density than water.
density of ball = less than water

30. Why is density important?
B. If an object has MORE density
than the liquid it will SINK.
The ball has MORE
density than water.
density of ball = more
than water

31. CST Review Questions
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32. CST Review Questions
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33. CST Review Questions
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34. CST Review Questions
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35. CST Review Questions
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36. CST Review Questions
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37. 18
CST Review Questions

38. Mass
Density Formula
You can rewrite the Density Formula
Density Volume

39. Mass
Density Formula
You can rewrite the Density Formula
Density Volume

40. CST Review Questions
18
Density = Mass
Volume
1. Density = 89g = 8.9 g/mL
10mL

41. CST Review Questions
18
1. Density = 89g = 8.9 g/mL
10mL
2. Density = 26g = 2.6 g/mL
10mL
3. Density = 24g = 0.24 g/mL
100mL
4. Density = 160g = 1.60 g/mL
100mL

42. CST Review Questions
18
1. Density = 89g = 8.9 g/mL
10mL
2. Density = 26g = 2.6 g/mL
10mL
3. Density = 24g = 0.24 g/mL
100mL
4. Density = 160g = 1.60 g/mL
100mL
Less than 1.0 g/mL

43. CST Review Questions
18

44. Density
Review

45. Think-Group-Share
An object has a mass of
50g and a volume of 5 mL.
What is its density?

46. Think-Group-Share
An object has a mass of
50g and a volume of 5 mL.
What is its density?
 10 g/mL
Density = Mass/Volume = 50g/5mL = 10g/mL
M
D V
M
D V

47. Think-Group-Share
An object will sink in water
because its density is ____
the density of the water.
 A. higher than
 B. lower than
 C. the same as

48. Think-Group-Share
An object will sink in water
because its density is ____
the density of the water.
 A. higher than
 B. lower than
 C. the same as

49. Why is density important?
C. If an object has MORE density
than the liquid it will SINK.
The ball has MORE
density than water.
density of ball = more
than water

50. Think-Group-Share
An object will float in water
because its density is ____
the density of the water.
 A. higher than
 B. lower than
 C. the same as

51. Think-Group-Share
An object will float in water
because its density is ____
the density of the water.
 A. higher than
 B. lower than
 C. the same as

52. What makes things float and sink?
A. If an object has LESS density
than the liquid it will FLOAT.
The ball has LESS
density than water.
density of ball = less than water

53. Think-Group-Share
What is density?
 A. the amount of matter in an
object
 B. the mass per unit volume
 C. the amount of space an object
takes up

54. Think-Group-Share
What is density?
 the amount of matter in an
object
 B. the mass per unit volume
 the amount of space an object
takes up

55. What is density?
III. Density is an object’s mass per
unit volume.
feathers rocks

56. Think-Group-Share
A boy pours 10 mL of water into
a graduated cylinder and drops
a marble into it. The water rises
to 20mL. What is the volume of
the marble?

57. Think-Group-Share
A boy pours 10 mL of water into
a graduated cylinder and drops
a marble into it. The water rises
to 20mL. What is the volume of
the marble?
 10 mL
Volume = 20mL - 10mL = 10mL

58. Measuring the Volume of an Irregular Solid
Volume of object + water _____
-Volume of water______ - _____
Volume of object _____
mL
mL10
20
10 ml
20 ml
10 ml
Volume = _________10 ml

59. Think-Group-Share
What is the volume of a
rectangular box that has a
length = 6 cm, width= 2 cm,
height = 3 cm?

60. Think-Group-Share
What is the volume of a
rectangular box that has a
length = 6 cm, width= 2 cm,
height = 3 cm?
 36 cm3
Volume = LxWxH = 6cm x 2cm x 3cm
= 36 cm3

61. Volumes are calculated using a
formula.
Volume (box) = length X width X height
How is volume measured?
Volume (ball) = 4/3 X pi X radius3

62. Think-Group-Share
A bottle holds 100 mL. It has a
density of 3 g/mL. What is its
mass?

63. Think-Group-Share
A bottle holds 100 mL. It has a
density of 3 g/mL. What is its
mass?
 300 g
mass = volume x density
= 100 mL x 3 g/mL
= 300 g
M
D V
M
D V

64. Think-Group-Share
A box has a mass of 60g and a
density of 10 g/mL What is its
volume?

65. Think-Group-Share
A box has a mass of 60g and a
density of 10 g/mL What is its
volume?
 6 mL
volume = mass/density
= 60g/10g/mL = 6 mL
M
D V
M
D V

66. Think-Group-Share
Water has a density of 1.0 g/mL.
Alcohol has a density of 0.81
g/mL. A ball has a density of
0.9g/mL. Will it float in water or
alcohol?

67. Think-Group-Share
Water has a density of 1.0 g/mL.
Alcohol has a density of 0.81
g/mL. A ball has a density of
0.9g/mL. Will it float in water or
alcohol?
 It floats in water.

68. Class Work
Volume and Density Practice Problems
Water has a density of 1.0 g/mL.
Alcohol has a density of 0.81 g/mL. A
ball has a density of 0.9g/mL. Will it
float in water or alcohol?
Less Density
Than Water
1.0 g/mL
0.9 g/mL

69. Think-Group-Share
Water has a density of 1.0 g/mL.
Alcohol has a density of 0.81
g/mL. A ball has a density of
0.9g/mL. Will it sink in water or
alcohol?

70. Think-Group-Share
Water has a density of 1.0 g/mL.
Alcohol has a density of 0.81
g/mL. A ball has a density of
0.9g/mL. Will it sink in water or
alcohol?
 It sinks in alcohol.

71. Class Work
Volume and Density Practice Problems
Water has a density of 1.0 g/mL.
Alcohol has a density of 0.81 g/mL. A
ball has a density of 0.9g/mL. Will it
sink in water or alcohol?
More Density
Than Alcohol
0.81 g/mL
0.9 g/mL

72. Think-Group-Share
A metal box has a mass of 90
grams and a volume of 10 mL.
What is its density?

73. Think-Group-Share
A metal box has a mass of 90
grams and a volume of 10 mL.
What is its density?
 Density = Mass/Volume = 9 g/mL
M
D V
M
D V

74. Think-Group-Share
The density of nickel is
8.99 g/mL. The density of zinc is
7.1 g/mL. Is the metal box made
of nickel or zinc?
 9 g/mL

75. Think-Group-Share
The density of nickel is
8.99 g/mL. The density of zinc is
7.1 g/mL. Is the metal box made
of nickel or zinc?
 It is made of nickel
9 g/mL = density

76. Think-Group-Share
What is the volume of the box?
 It sinks in alcohol.
10 cm
5 cm
2 cm
Mass = 300 grams

77. Think-Group-Share
What is the volume of the box?
 100 cm3
V = LxWxH = 10 cm x 5 cm x 2 cm
= 100 cm3
10 cm
5 cm
2 cm
Mass = 300 grams

78. Think-Group-Share
What is the density of the box?
10 cm
5 cm
2 cm
Mass = 300 grams

79. Think-Group-Share
What is the density of the box?
 3 g/cm3
D = Mass/Volume = 300g/100cm3
= 3 g/cm3
10 cm
5 cm
2 cm
Mass = 300 grams

80. Think-Group-Share
The density of water is 1.0 g/mL.
Will the box float or sink in water?
10 cm
5 cm
2 cm
Mass = 300 grams

81. Think-Group-Share
The density of water is 1.0 g/mL.
Will the box float or sink in water?
 It will sink in water.
3 g/cm3 is greater than 1 g/mL
10 cm
5 cm
2 cm
Mass = 300 grams

82. Think-Group-Share
What liquid is A?
A
B
C
D
E

83. Think-Group-Share
What liquid is A?
 vegetable oil
A
B
C
D
E

84. Think-Group-Share
What liquid is B?
A
B
C
D
E

85. Think-Group-Share
What liquid is B?
 water
A
B
C
D
E

86. Think-Group-Share
What liquid is C?
A
B
C
D
E

87. Think-Group-Share
What liquid is C?
 Dawn
A
B
C
D
E

88. Think-Group-Share
What liquid is D?
A
B
C
D
E

89. Think-Group-Share
What liquid is D?
 Karo Syrup
A
B
C
D
E

90. Think-Group-Share
What liquid is E?
A
B
C
D
E

91. Think-Group-Share
What liquid is E?
 Honey
A
B
C
D
E