Wednesday, January 9, 2008

6th Grade - Chapter 14 ONLINE REVIEW

6th Grade - Chapter 14 ONLINE REVIEW

Modified True/False
Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true.

____ 1. The ability of a measurement to be reproduced with the same result is a sign of accuracy. _________________________

____ 2. Zero Celsius is the coldest possible temperature. _________________________

____ 3. A kilogram is 1,000 times as large as a gram. _________________________

____ 4. The mass of an object can vary with the object's location. _________________________

____ 5. A circle graph is always based on percentages. _________________________

____ 6. Speed is an estimation often measured in kilometers per hour. _________________________

____ 7. A line graph shows the relationship between three variables. _________________________

Multiple Choice
Identify the choice that best completes the statement or answers the question.

____ 8. Dorothy drops a rock into a beaker containing 3 mL of water.
What is the volume of the rock?
a.
1 cm3
b.
2 cm3
c.
3 cm3
d.
4 cm3


____ 9. What do qualitative descriptions provide information about?
a.
how far
b.
how much
c.
numbers or measurements
d.
properties or characteristics


____ 10. Chris draws a best-fit line on a line graph.
By extending the best-fit line, how many new students might there be in 2006?
a.
150
b.
200
c.
250
d.
275


____ 11. A car can travel one fourth of a kilometer in a second. How should the car’s speed be expressed?
a.
0.04 km/s
b.
0.25 km/s
c.
0.04 s/km
d.
0.25 s/km


____ 12. Why do you need to use caution when looking at a broken scale on a graph?
a.
It can be misleading if not used with care.
b.
It cannot weigh material accurately.
c.
The x-axis probably does not go down to zero.
d.
The y-axis always goes down to zero.


____ 13. Which can help you make a rough measurement of an object?
a.
determination
b.
estimation
c.
mass
d.
volume


____ 14. How are SI units related?
a.
by multiples of 1
b.
by multiples of 10
c.
by multiples of 100
d.
by multiples of 1,000


____ 15. Which is the SI unit of time?
a.
day
b.
hour
c.
minute
d.
second


____ 16. How do weight and mass differ?
a.
Mass depends on the amount of matter in an object; weight depends on gravity.
b.
Mass depends on the amount of matter in the atmosphere; weight does not.
c.
Weight depends only on pressure in the atmosphere; mass depends on gravity.
d.
Weight depends on the amount of matter in an object; mass depends on gravity.


____ 17.
Precision describes how close a group of measurements are to each other. What does accuracy refer to?
a.
how close a measurement is to a random estimate
b.
how close a measurement is to any other measurement
c.
how close a measurement is to being precise
d.
how close a measurement is to real, actual, or accepted value


____ 18. Where on a line graph is an independent variable placed?
a.
along the horizontal, or y, axis
b.
along the horizontal, or x, axis
c.
along the vertical, or x, axis
d.
along the vertical, or y, axis


____ 19. How can a line graph help make predictions?
a.
by comparing the x-axis data to the y-axis data
b.
by extending the line beyond the last data point on the graph
c.
by comparing the independent variables to the dependent variables
d.
by increasing the independent variables in a given situation


____ 20. Which represents the SI unit of volume?
a.
km2
b.
km3
c.
m2
d.
m3


____ 21. When you measure something in meters cubed, you are measuring ____.
a.
length
c.
volume
b.
area
d.
mass


____ 22. If you were to round off the measurement 2.33501 grams to three digits, you would get ____.
a.
2.33 g
c.
2.35 g
b.
2.34 g
d.
2.36 g


____ 23. A bowler who always left the same three pins standing could be considered a(n) ____ bowler.
a.
accurate and precise
c.
precise
b.
accurate
d.
good


____ 24. A millisecond is to a second as one is to ____.
a.
1,000
c.
10
b.
100
d.
100,000


____ 25. A cubic centimeter can be expressed as ____.
a.
ccm
c.
ct
b.
cm3 or cc
d.
ccm3


____ 26. The value of the boiling point of water on the Kelvin scale is ____ the value of the boiling point of water on the Celsius scale.
a.
equal to
c.
higher than
b.
lower than
d.
10 times


____ 27. To make a scale drawing of a basketball court, which of the following scales would be most useful?
a.
1 cm = 1 m
c.
1 m = 1 km
b.
1 km = 1 m
d.
1 m = 1 cm


____ 28. When evaluating a paper delivery, a homeowner would be most concerned about ____.
a.
the accuracy of the throws
c.
the speed of the throws
b.
the precision of the throws
d.
the timing of the throws


____ 29. In which of the following situations would it NOT be wise to estimate?
a.
the number of miles per gallon an automobile can provide
b.
the time it would take to walk to the grocery store from home
c.
the amount of food to prepare for twelve people
d.
the amount of medicine to give a patient


____ 30. SI units are useful because they are all related by multiples of ____.
a.
two
c.
10
b.
five
d.
50


____ 31. The advantage data in a table has over data presented in a paragraph is the ____.
a.
number of digits that can be included
b.
accuracy of the data
c.
way the data is organized
d.
amount of detail that can be included


____ 32. In which of the following situations would the reply 1 minute, 45 seconds, and ten one-hundredths of a second be a reasonable answer?
a.
describing the time left before the end of class
b.
estimating the length of a cut on a CD
c.
describing the time it takes to bike from your house to school
d.
describing the time of a bobsled run at the Olympic trials


____ 33. Which of the following visual displays would be best for describing the percentages of different gases in the atmosphere?
a.
circle graph
c.
bar graph
b.
line graph
d.
any of the above


____ 34. A pitcher holds 1.725 L. What is the capacity of the pitcher to the nearest liter?
a.
1 L
c.
1.7 L
b.
1.73 L
d.
2 L


____ 35. Which unit would you use to measure the length of a mailbox?
a.
nanometer
c.
meter
b.
centimeter
d.
kilometer


____ 36. The temperature on a spring day is 18°C. To the nearest whole number, what is the temperature in kelvins?
a.
291K
c.
–229K
b.
255K
d.
–255K


____ 37. A scale is marked in tenths of a kilogram. To what precision can the mass of a bag of apples be measured?
a.
the nearest tenth of a kilogram
c.
the nearest kilogram
b.
the nearest one-half kilogram
d.
the nearest ten kilograms


____ 38. Which of the following is NOT a measurement?
a.
age
c.
weight
b.
shoe size
d.
eye color


____ 39. Which multiplier would you use to convert 1.9 km to meters?
a.
1000
c.
1/100
b.
10
d.
1/1000


____ 40. Which unit would you use to measure the distance from Dallas, Texas, to Memphis, Tennessee?
a.
light year
c.
meter
b.
kilometer
d.
centimeter


____ 41. Suppose you traveled to Mars. Compare your weight and your mass on Mars to your weight and mass on Earth.
a.
Both your weight and mass would remain the same.
b.
Your weight would remain the same, your mass would change.
c.
Your weight would change, your mass would remain the same.
d.
Both your weight and your mass would change.


____ 42. A digital thermometer shows the temperature as 21.2°C. The thermometer is precise to the nearest ____.
a.
10°
c.
0.1°
b.

d.
0.01°


____ 43. What property of an object is measured in grams?
a.
volume
c.
mass
b.
capacity
d.
weight


____ 44. A section of a circle graph measures 180°. What percent of a circle graph is this section?
a.
18%
c.
80%
b.
50%
d.
100%


____ 45. What unit would you use to measure the area of a carpet?
a.
meters
c.
cubic centimeters
b.
square meters
d.
square kilograms


____ 46. Which graph would best show what percent of your class wears glasses?
a.
bar graph
c.
line graph
b.
circle graph
d.
any of these graphs


____ 47. Data in a table is organized ____.
a.
from greatest to least
c.
in rows and columns
b.
to the greatest precision
d.
all of these


____ 48. What unit would you use to measure the length of a carpet?
a.
meters
c.
kilograms
b.
kilometers
d.
liters


____ 49. Which is a reasonable estimate of the length around your wrist?
a.
8 mm
c.
36 km
b.
20 cm
d.
58 nm


____ 50. Which is the symbol for the SI unit of temperature?
a.
K
c.
°K
b.
°T
d.
°F


____ 51. How would you calculate the angle to show 20% in a circle graph?
a.
0.20 ¸ 180
c.
0.20 ´ 180
b.
360 ¸ 0.20
d.
0.20 ´ 360


____ 52. Which is NOT an SI unit?
a.
kilograms
c.
ounce
b.
decimeter
d.
millimeter


Completion
Complete each statement.

53. Data displayed in rows and columns is called a(n) ____________________.

54. You can use ____________________ to check that an answer is reasonable.

55. A ____________________ graph uses percentages to relate the parts to the whole.

56. ____________________ graphs show variables on the horizontal axis and the vertical axis.

57. The SI unit of length is the ____________________.

58. ____________________ provides a worldwide standard of physical measurement.

59. The ____________________ is the SI unit for temperature.

60. The ____________________ of an object measures the amount of matter in the object.

Choose the term in parentheses that correctly completes the sentence.

61. The prefix ____________________ (deci-, centi-, deca-) tells you to multiply by 0.1.

62. The most reasonable measurement for the length of a pen is ____________________ (14 cm, 14 mm, 14 m).

63. To show how your body temperature changes every hour, you could use a ____________________ (circle, bar, line) graph.

64. ____________________ (Estimation, Accuracy, Precision) compares a measurement to the real value.

65. To convert 50 kilometers to meters, multiply 50 by ____________________ (10, 100, 1000).

66. ____________________ (Mass, Volume, Weight) is a measurement of force.

67. One kelvin difference in temperature is ____________________ (greater than, equal to, less than) one degree Celsius difference in temperature.

68. On a circle graph, a section with an angle measuring 180° represents ____________________ (18%, 50%, 90%) of the whole.

Matching

Match the units of measurement with the factors that can be measured.
a.
meter
c.
kilogram
b.
liter
d.
kelvin


____ 69. mass of an orange

____ 70. volume of orange juice

____ 71. freezing point of carbon dioxide

____ 72. length of a soccer field

Short Answer

73.
Anna multiplies 5.57 by 6.2. How would rounding affect the answer? How many significant digits should there be in the answer? Explain your answer.

74.
April wants to create a circle graph of the five most popular dog breeds in the United States. She has gathered the following totals: Labrador retriever (146,692), golden retriever (52,550), German shepherd (46,046), beagle (44,555), Yorkshire terrier (43,522). What steps will April need to take to determine the part (angle) each breed will have on the circle graph?

75.
Which unit of measurement is better for determining the volume for a drop of water: a milliliter or a liter? Explain.

76.
In earlier centuries, people used body parts to make measurements. They might take 50 steps and call the distance 50 feet or measure the height of a horse in hand spans. What were the advantages and disadvantages of these types of measurements?

77.
Discuss each of the following descriptions. How precise is the information they supply? (A) The sweatshirt comes in small, medium, or large. (B) The dress is a size 14. (C) The engagement ring is a size 6.

78.
Suppose you have an X ray of an arm, which is taken because the doctor suspects a bone is broken. You also have a drawing showing the locations of the bones in a human body. Explain how both of these visuals could contribute valuable data to the situation.

79.
Describe two advantages of the SI system over the system of measurements that is still commonly used in the United States.

80.
Would your mass and weight be different on Mars than on Earth?

81.
Suppose you read the following description in the want ads for a used car: mint condition, 55,000 miles on the odometer, model XJ4500, willing to accept reasonable offer. Describe the usefulness of each piece of data. What do the more valuable pieces of data have in common?

82.
How can you measure the volume of a solid that does not have a regular shape? What property must the solid NOT have for your method to work?

83.
Water freezes at 32 degrees and boils at 212 degrees on the Fahrenheit temperature scale. Compare the size of a degree of the Fahrenheit scale to the size of a degree on the Celsius scale.

84.
What are the main reasons for preparing a scale drawing? What is the key decision that must be made before you can begin?

85.
Use an example to explain how the available tools can affect the precision of a measurement.

Calories Used While Swimming for 30 Minutes
Type of Stroke
56-kg woman
77-kg man
Backstroke
95
130
Breaststroke
91
125
Fast Crawl
87
120
Slow Crawl
95
130
Sidestroke
68
90
Treading Water
35
48
Table 2-1


86.
There are three factors that vary in Table 2-1. One is the number of Calories. What are the other two?

87.
Describe the type of graph you could make from the data in Table 2-1 that would include all the factors that vary.

88.
There is a fourth variable mentioned in Table 2-1 that is kept constant. What is this variable?

89.
According to Table 2-1, which activity should a swimmer choose to burn the most calories?

Country
Percent of Eligible Voters That Voted
Rank
United States
44.9%
138
Canada
60.1%
107
Costa Rica
84.6%
14
Hungary
66.9%
82
Japan
57.0%
118
Egypt
27.7%
159
South Africa
85.5%
10

Table 2-2



90.
How could you reorganize Table 2-2 so that the data would be more useful?

91.
There were 163 countries studied. Malta was rated number 1. Based on Table 2-2, what can you say about the percent that voted in Malta?

92.
Of the 163 countries studied, Mali was rated number 163. From the data in Table 2-2, what are you able to infer about the percent that voted in Mali?

93.
Could you prepare a single circle graph using the data in Table 2-2? Explain.

94. Write the SI unit that would be the most appropriate way to measure each of the following.

a. mass of an egg:
b. amount of soil a rectangular flower box can hold:
c. distance between Maine and Florida:
d. temperature in Antarctica in winter:
e. thickness of a sheet of tracing paper:
f. rate at which water flows from a faucet:

Use the table to answer the following questions.

Zoo admission Fee Usage
(per dollar)
Use
Amount
Grounds maintenance
$0.55
Animal care
$0.20
Building fund
$0.15
Salaries
$0.10


95. What percentage of every dollar goes to salaries?

96. Which type of graph could not be used to display the data in the table? Why?

97. To make a circle graph of the data in the table, how many degrees would represent animal care?

98. List three measurements and three other facts that describe this container.


The table shows the age and sex of 60 house sparrows.

House sparrows
Number
Percent
Circle graph angle
1. Adult females
15


2. Adult males
12


3. Juvenile females
18


4. Juvenile males
15




99. Find the percent of the total for each type of sparrow. Then complete the table by finding angles you can use to draw a circle graph.

100. Use the angles from the table and your estimation skills to sketch a circle graph.


101. Suppose you want to graph the number of each type of sparrow. What kind of graph would you use?

102. Explain how you would round 2.625 m to the nearest tenth of a meter.

103. How many centimeter cubes can be shipped in this box?


104. List these masses in order from greatest to least: 6471 mg, 9 kg, 76 mg, 422 g.

105. Compare the precision of these rulers. Then list them from most precise to least precise.


Problem

106. Calculate the volume of a container that is 9 centimeters long, 5.2 centimeters wide, and 2.55 cm tall. Choose an appropriate number of digits for your answer based on the precision of the data supplied. (volume = length ´ width ´ height)

107. Convert 255 centimeters to meters, millimeters, and kilometers.

108. What are the two rules for deciding the number of significant digits in the answer to a calculation?

Essay

109. How could you estimate a cat’s length if you did not have a ruler?

110. Jenny says she can identify an SI base unit because a base unit does not contain a prefix. Is she right?
6th Grade - Chapter 14 ONLINE REVIEW
Answer Section

MODIFIED TRUE/FALSE

1. ANS: F, precision

PTS: 1 DIF: Webb's I OBJ: 3/1 STA: SC.H.1.3.4 SC.H.1.3.5

2. ANS: F, Kelvin

PTS: 1 DIF: Webb's I OBJ: 5/2

3. ANS: T PTS: 1 DIF: Webb's I
OBJ: 5/2

4. ANS: F, weight

PTS: 1 DIF: Webb's I OBJ: 5/2 STA: SC.A.1.3.2

5. ANS: T PTS: 1 DIF: Webb's I
OBJ: 8/3

6. ANS: F, a rate

PTS: 1 DIF: Webb's I OBJ: 5/2 STA: SC.C.1.3.1

7. ANS: F, two variables

PTS: 1 DIF: Webb's I OBJ: 8/3

MULTIPLE CHOICE

8. ANS: A PTS: 1 DIF: Webb's II STA: SC.H.1.3.4

9. ANS: D PTS: 1 DIF: Webb's I STA: SC.H.1.3.4

10. ANS: C PTS: 1 DIF: Webb's II STA: SC.H.1.3.4

11. ANS: B PTS: 1 DIF: Webb's II STA: SC.H.1.3.4

12. ANS: A PTS: 1 DIF: Webb's I STA: SC.H.1.3.4

13. ANS: B PTS: 1 DIF: Webb's I STA: SC.H.1.3.4

14. ANS: B PTS: 1 DIF: Webb's I STA: SC.H.1.3.4

15. ANS: D PTS: 1 DIF: Webb's I STA: SC.H.1.3.4

16. ANS: A PTS: 1 DIF: Webb's II STA: SC.A.1.3.2

17. ANS: D PTS: 1 DIF: Webb's I STA: SC.H.1.3.4

18. ANS: B PTS: 1 DIF: Webb's I STA: SC.H.1.3.4

19. ANS: B PTS: 1 DIF: Webb's II STA: SC.H.1.3.4

20. ANS: D PTS: 1 DIF: Webb's I STA: SC.H.1.3.4

21. ANS: C PTS: 1 DIF: Webb's I OBJ: 5/2

22. ANS: B PTS: 1 DIF: Webb's I OBJ: 2/1

23. ANS: C PTS: 1 DIF: Webb's I OBJ: 3/1

24. ANS: A PTS: 1 DIF: Webb's I OBJ: 5/2

25. ANS: B PTS: 1 DIF: Webb's I OBJ: 5/2

26. ANS: C PTS: 1 DIF: Webb's I OBJ: 5/2

27. ANS: A PTS: 1 DIF: Webb's I OBJ: 5/2

28. ANS: A PTS: 1 DIF: Webb's I OBJ: 3/1

29. ANS: D PTS: 1 DIF: Webb's II OBJ: 1/1

30. ANS: C PTS: 1 DIF: Webb's I OBJ: 4/2

31. ANS: C PTS: 1 DIF: Webb's I OBJ: 6/3

32. ANS: D PTS: 1 DIF: Webb's I OBJ: 2/1
STA: SC.C.1.3.1

33. ANS: A PTS: 1 DIF: Webb's I OBJ: 8/3

34. ANS: D PTS: 1

35. ANS: B PTS: 1

36. ANS: A PTS: 1

37. ANS: A PTS: 1

38. ANS: D PTS: 1

39. ANS: A PTS: 1

40. ANS: B PTS: 1

41. ANS: C PTS: 1

42. ANS: C PTS: 1

43. ANS: C PTS: 1

44. ANS: B PTS: 1

45. ANS: B PTS: 1

46. ANS: B PTS: 1

47. ANS: C PTS: 1

48. ANS: A PTS: 1

49. ANS: B PTS: 1

50. ANS: A PTS: 1

51. ANS: D PTS: 1

52. ANS: C PTS: 1

COMPLETION

53. ANS: table

PTS: 1 DIF: Webb's I OBJ: 6/3

54. ANS: estimation

PTS: 1 DIF: Webb's I OBJ: 1/1

55. ANS: circle

PTS: 1 DIF: Webb's I OBJ: 7/3

56. ANS: Line

PTS: 1 DIF: Webb's I OBJ: 7/3

57. ANS: meter

PTS: 1 DIF: Webb's I OBJ: 5/2

58. ANS: SI

PTS: 1 DIF: Webb's I OBJ: 4/2

59. ANS: kelvin

PTS: 1 DIF: Webb's I OBJ: 5/2

60. ANS: mass

PTS: 1 DIF: Webb's I OBJ: 5/2

61. ANS: deci-

PTS: 1

62. ANS: 14 cm

PTS: 1

63. ANS: line

PTS: 1

64. ANS: Accuracy

PTS: 1

65. ANS: 1000

PTS: 1

66. ANS: Weight

PTS: 1

67. ANS: equal to

PTS: 1

68. ANS: 50%

PTS: 1

MATCHING

69. ANS: C PTS: 1 DIF: Webb's I OBJ: 5/2
STA: SC.A.1.3.1

70. ANS: B PTS: 1 DIF: Webb's I OBJ: 5/2
STA: SC.A.1.3.1

71. ANS: D PTS: 1 DIF: Webb's I OBJ: 5/2
STA: SC.A.1.3.1

72. ANS: A PTS: 1 DIF: Webb's I OBJ: 5/2

SHORT ANSWER

73. ANS:
The number of significant digits in a product or quotient is determined by the multiplier or divisor with the fewest significant digits. There are two significant digits in 6.2, so there should be two significant digits in the answer. Multiplying these two numbers yields 34.534. Because there should be two significant digits, the answer is rounded up to 35.

PTS: 1 DIF: Webb's II STA: SC.H.1.3.4

74. ANS:
First, determine the total number of the parts: 333,365. Next, set up ratios and solve for x. Labradors, for example, have the following ratio: 146,692/333,365 = x/360º. This yields an angle of 158º for labradors. The parts (angles) for the other dogs are: golden retriever, 57º; German shepherd, 50º; beagle, 48º; and Yorkshire terrier, 47º.

PTS: 1 DIF: Webb's III STA: SC.H.1.3.4

75. ANS:
A milliliter; an instrument designed to measure liters will not be precise enough to measure such a small volume.

PTS: 1 DIF: Webb's II OBJ: 5/2 STA: SC.A.1.3.1

76. ANS:
Advantage: the measurement device was always available. Disadvantage: because the measurements varied from person to person, they were not accurate.

PTS: 1 DIF: Webb's II OBJ: 3/1

77. ANS:
(A) There is no way to know from these relative descriptions the actual size of the garment. (B) Size 14 items from different designers can have very different measurements. (C) Although the units are not specified, ring sizes have a reproducible value; they are based on standard measurements of finger circumference.

PTS: 1 DIF: Webb's II OBJ: 3/1

78. ANS:
The diagram shows the desired location of the bones; the X ray shows their actual locations. Comparing the two could help the doctor correctly set the bone.

PTS: 1 DIF: Webb's II OBJ: 6/3

79. ANS:
The SI units are a worldwide standard and they are based on multiples of 10, which make calculations easier.

PTS: 1 DIF: Webb's II OBJ: 4/2

80. ANS:
Your mass would be the same because the amount of matter would be the same. Your weight would be less on Mars than on Earth because the gravitational force on Mars is different from the gravitational force on Earth.

PTS: 1 DIF: Webb's II OBJ: 5/2 STA: SC.A.1.3.2

81. ANS:
Mint condition and reasonable offer aren’t very helpful because they depend on the interpretation of the user. The mileage and the model are more useful because they supply specific numerical information about wear and features.

PTS: 1 DIF: Webb's II OBJ: 1/1

82. ANS:
You can immerse the solid in water and measure the volume of the water displaced. The solid cannot dissolve in water.

PTS: 1 DIF: Webb's II OBJ: 5/2

83. ANS:
A degree on the Fahrenheit scale must be smaller because there are 180 degrees between freezing and boiling as compared to 100 degrees for the same range on the Celsius scale.

PTS: 1 DIF: Webb's II OBJ: 4/2

84. ANS:
A scale drawing makes it easier to visualize and work with objects of systems that are very large or very small. The key decision is determining the scale, i.e., the ratio between the dimensions of the object and the scale drawing.

PTS: 1 DIF: Webb's II OBJ: 6/3

85. ANS:
Possible answer: A clock with a second hand is adequate for measuring a pulse rate or boiling an egg; however, a device that can record time in hundredths of a second is required for track meets.

PTS: 1 DIF: Webb's II OBJ: 3/1

86. ANS:
type of stroke; type of swimmer

PTS: 1 DIF: Webb's II OBJ: 6/3

87. ANS:
a bar graph with type of stroke on the x-axis and calories on the y-axis; there would be two bars for each stroke, one for the woman, one for the man

PTS: 1 DIF: Webb's II OBJ: 8/3

88. ANS:
time

PTS: 1 DIF: Webb's II OBJ: 6/3

89. ANS:
either the backstroke or slow crawl, which produce equal results

PTS: 1 DIF: Webb's II OBJ: 6/3

90. ANS:
Place the countries in order of rank.

PTS: 1 DIF: Webb's II OBJ: 6/3

91. ANS:
It was higher than 85.5% (actually 96.7%).

PTS: 1 DIF: Webb's II OBJ: 6/3

92. ANS:
It was lower than 27.7% (actually 21.9%).

PTS: 1 DIF: Webb's II OBJ: 6/3

93. ANS:
no; the percents given are parts of different wholes

PTS: 1 DIF: Webb's II OBJ: 8/3

94. ANS:
a. gram
b. cubic meter
c. kilometer
d. Kelvin
e. micrometer
f. milliliters/second

PTS: 1

95. ANS:
10%

PTS: 1

96. ANS:
line graph—only one variable is a number

PTS: 1

97. ANS:
72°

PTS: 1

98. ANS:
Measurements: diameter, height 10 cm, mass 300 g
Other Facts: container is a cylinder or can, label reads “soup”, label is white

PTS: 1

99. ANS:
1. 15/60 = 25%, 90°
2. 12/60 = 20%, 72°
3. 18/60 = 30%, 108°
4. 15/60 = 25%, 90°

PTS: 1

100. ANS:

PTS: 1

101. ANS:
A bar graph would be the most appropriate to show the number of sparrows in each group. There are between 12 and 18 sparrows in each group. Any scale that includes those numbers would be acceptable, possibly 0–21 in intervals of three.

PTS: 1

102. ANS:
To round to the nearest tenth of a meter, look at the hundredths. There are 2 hundredths. Since digits 1, 2, 3, and 4 are rounded down, round 2.62 to 2.6.

PTS: 1

103. ANS:
4000

PTS: 1

104. ANS:
9 kg, 422 g, 6471 mg, 76 mg

PTS: 1

105. ANS:
Ruler A is precise to the nearest 0.5 cm; ruler B is precise to the nearest millimeter; and ruler C is precise to the nearest cm. So from most precise to least precise, they are rulers B, A, and C.

PTS: 1

PROBLEM

106. ANS:
119.340 cm3 rounded off to 119 cm3

PTS: 1 DIF: Webb's II OBJ: 2/1

107. ANS:
2.55 m; 2550 mm; 0.00255 km or 2.55 ´ 10-3 km

PTS: 1 DIF: Webb's II OBJ: 5/2

108. ANS:
(1) For multiplication and division, you determine the number of significant digits in each number in your problem. The significant digits of your answer is determined by the number with fewer digits. (2) For addition and subtraction, you determine the place value of each number in your problem. The significant digits of the answer is determined by the number that is least precise.

PTS: 1 DIF: Webb's III OBJ: 2/1

ESSAY

109. ANS:
You can use a measurement that you know to estimate the cat’s length. For example, if you know your hand span is about 20 cm, you can use your hand span to estimate the cat’s length.

PTS: 1

110. ANS:
Although it is true that most of the base units do not contain a prefix, the exception is the kilogram, which contains the prefix kilo-. She is wrong.

PTS: 1

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