Standards for Measurement



Vocabulary



1.
ratio of two equivalent measurements

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2.
closeness to true value

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3.
narrowness of range of measurements

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4.
known or estimated in a measurement

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The temperature at which the chemical paradichlorobenzene melts is 57.4ºC. A team of three students, conducted the experiment three different times, determined the melting point to be 59.6ºC, 51.2ºC, and 54.4ºC.

5.
the measurements the team obtained were
A.
precise but not accurate
B.
both precise and accurate
C.
neither precise nor accurate
D.
accurate but not precise

6.
What is the team's average results?

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Basics (using scientific notation)



7.
Express 0.0675 in scientific notation.

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8.
The largest number from the following is
A.
4.80x10-4
B.
4.80x10-8
C.
4.80x10-2
D.
4.90x10-6


9.
Express 36600 in scientific notation

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Significant Figures



How many significant figures are in each of the following numbers?

10.
170300

Answer:

11.
0.06040

Answer:

12.

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13.
130,092

Answer:

14.
7.02 x 10-4

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15.
Which answer represents the measurement 0.006248 g rounded to two significant figures?

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16.
There are five significant figures in the measurement 0.00450 m because all zeros to the right of a decimal point in a measurement are significant.
A. True
B. False


17.
32.4 cm x 1.2 cm equals

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18.
What is the result of adding 2.5 x 103 and 3.5 x 102?

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Units



19.
All of the following units can be used for density except
A.
g/cm3
B.
kg/m3
C.
g/mL
D.
kg/m2


20.
Which unit is not a basic SI unit of measurement in the metric system?
A.
gram
B.
Kelvin
C.
meter
D.
m3


21.
Which of these series of units is ordered from smallest to largest?
A.
μg, cg, mg, kg
B.
mm, dm, m, km
C.
μs, ns, cs, s
D.
nL, mL, dL, cL


22.
LAB: A piece of silver foil is 22.2 cm long and 16.1cm wide. It has a mass of 4.3 g. How thick is the foil? HINT: you need to use the density of silver.

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23.
A cube of gold-colored metal with a volume of 61.0 cm3 has a mass of 990.0 g. Mathematically, can the cube be pure gold?

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24.
All of the following except which is an accepted SI unit?
A.
kilogram
B.
meter
C.
mL
D.
Celsius


Temperature Conversion



25.
A temperature in kelvins is always numerically larger than the same temperature in degrees Celsius because a temperature in kelvins equals a temperature in degrees Celsius plus 273.
A. True
B. False


26.
A temperature of 338 K is equivalent to

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27.
On a very warm summer day a Canadian weather report gives the current temperature as 28oC. Determine this temperature on the Fahrenheit scale.

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Density - Please use the density chart in your reference section to complete the following questions.



28.
Arrange these materials in order of increasing density: salt, vegetable oil, aluminum, and ethyl alcohol

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29.
The mass of a block is 8.99 g and its density is 2.23 g/mL. The volume of the block is

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30.
A 22.4 g piece of aluminum is dropped in a graduated cylinder containing 25.9 mL of water. The water level rises to 34.2 mL. The density of aluminum is

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Conversions



31.
What is the cost of one kilogram of sugar if sugar costs $1.37 per 5.0 lbs?

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32.
How many minutes would it take a car traveling at 65.0 miles/hour to cover 23.0 km?

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33.
The number of centimeters in 8.00 ft is

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34.
5.90 feet is how many millimeters?

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35.
The recommended adult dosage of a particular medication used to treat asthma is 6.00 mg per kg of body weight. What dose, in milligrams, is required for a 155-pound person?

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36.
An over-the-counter medicine has 305 mg of its active ingredient per tablet. How many kilograms does this mass represent?

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37.
If 104 μm = 1 cm, how many μm3= 1 cm3?

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38.
5How many meters does a car moving at 95 km/h travel in 2.0 s?

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