1. LecturePLUS Timberlake
Chapter 1 Measurements
Prefixes and
Equalities
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2. LecturePLUS Timberlake
Metric Prefixes
Increase or decrease basic unit by 10
Form new units larger or smaller than the basic units
Indicate a numerical value
prefix = value
1 kilometer = meters
1 kilogram = grams
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3. Prefixes that Increase A Unit
Prefix Symbol Value
giga- G
mega- M
kilo- k
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4. Prefixes that Decrease A Unit
Prefix Symbol Value
deci- d 0.1
centi- c
milli- m
micro-  (mu)
nano n
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5. LecturePLUS Timberlake
Learning Check
Match 1) length 2) mass 3) volume
____ A. A bag of tomatoes is 4.6 kg.
____ B. A person is 2.0 m tall.
____ C. A medication contains 0.50 g Aspirin.
____ D. A bottle contains 1.5 L of water.
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6. LecturePLUS Timberlake
Solution
Match 1) length 2) mass 3) volume
_2 A. A bag of tomatoes is 4.6 kg.
_1_ B. A person is 2.0 m tall.
_2_ C. A medication contains 0.50 g Aspirin.
_3_ D. A bottle contains 1.5 L of water.
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7. LecturePLUS Timberlake
Learning Check
Select the unit you would use to measure
A. Your height
1) millimeters 2) meters 3) kilometers
B. Your mass
1) milligrams 2) grams 3) kilograms
C. The distance between two cities
1) millimeters 2) meters 3) kilometers
D. The width of an artery
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8. LecturePLUS Timberlake
Solution
A. Your height
2) meters
B. Your mass
3) kilograms
C. The distance between two cities
3) kilometers
D. The width of an artery
1) millimeters
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9. LecturePLUS Timberlake
Learning Check
Indicate the prefix to use for
1. A mass that is 1000 times greater than 1 gram
1) kilo 2) milli 3) mega
2. A length that is 1/100 of 1 meter?
1) deci 2) centi 3) milli
3. A unit of time that is 1/1000 of a second.
1) nanosecond 2) microsecond 3)millisecond
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10. LecturePLUS Timberlake
Solution
1. 1) kilo
2. 2) centi
3. 3) millisecond
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11. LecturePLUS Timberlake
Equalities
State the same measurement in two different units
length
10.0 in.
25.4 cm
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12. Some Metric Equalities
Length
1 m = 100 cm
Mass
1 kg = g
Volume
1 L = 1000 mL
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13. LecturePLUS Timberlake
Learning Check
A m = 1 ___ 1) mm 2) km 3) dm
B g = 1 ___ 1) mg 2) kg 3) dg
C L = 1 ___ 1) mL 2) cL 3) dL
D m = 1 ___ 1) mm 2) cm 3) dm
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14. LecturePLUS Timberlake
Solution
A m = 1 ___ 2) km
B g = 1 ___ 1) mg
C L = 1 ___ 3) dL
D m = 1 ___ 2) cm
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15. LecturePLUS Timberlake
Learning Check
Give the value of the following units:
A. 1 kg = ____ g
1) 10 g 2) 100 g 3) g
B. 1 mm = ____ m
1) m 2) m 3) 0.1 m
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16. LecturePLUS Timberlake
Solution
A. 1 kg = ____ g
3) 1000 g
B. 1 mm = ____ m
1) m
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17. Some American Equalities
1 ft = inches
1 lb = 16 oz
1 quart = pints
1 quart = 4 cups
Why are the quantities in each pair equal?
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18. Some American Equalities
1 ft = 12 inches
1 lb = 16 oz
1 quart = pints
1 quart = 4 cups
The quantities in each pair give the same measured amount in two different units.
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19. Some Metric-American Equalities
1 in. = 2.54 cm
1 qt = 946 mL
1 L = 1.06 qt
1 lb = 454 g
1 kg = 2.20 lb
Remember these for exams.
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20. Equalities given in a Problem
Example 1
At the store, the price of one pound of red peppers is $2.39.
Equality: 1 lb red peppers = $2.39
Example 2
At the gas station, one gallon of gas is $1.34.
Equality: 1 gallon of gas = $1.34
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21. LecturePLUS Timberlake
Conversion Factors
Fractions in which the numerator and denominator are quantities expressed in an equality between those units
Example: in. = 2.54 cm
Factors: 1 in and cm
2.54 cm in.
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22. LecturePLUS Timberlake
Learning Check
Write conversion factors that relate each of the following pairs of units:
A. Liters and mL
B. Hours and minutes
D. Meters and kilometers
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23. LecturePLUS Timberlake
Solution
A. quarts and mL 1 L = 1000 mL
1 L and mL
1000 mL L
B. hours and minutes 1 hr = 60 min
1 hr and min
60 min 1 hr
C. meters and kilometers 1 km = 1000 m
1 km and m
1000 m km
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