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WorksheetsUnit 2 Scientific Measurement Review
Total questions: 20
Worksheet time: 16mins
Name
Class
Date
1.
The diameter of a carbon atom is 0.000 000 000 154 m. What is this number expressed in scientific notation?
a)
1.54 x 1012 m
b)
1.54 x 10-12 m
c)
1.54 x 1010 m
d)
1.54 x 10-10 m
2.
The expression of 5008 km in scientific notation is ____.
a)
5.008 x 103 km
b)
50.08 X 10-4 km
c)
5.008 x 10-3 km
d)
5.008 x 104 km
3.
The closeness of a measurement to its true value is a measure of its ___.
a)
precision
b)
accuracy
c)
reproducibility
d)
usefulness
4.
Which of the following measurements contains two significant figures?
a)
0.004 00 L
b)
0.004 04 L
c)
0.000 44 L
d)
0.004 40 L
5.
Which group of measurements is the most precise? (Each group of measurements is for a different object.)
a)
2 g, 3 g, 4 g
b)
2.0 g, 3.0 g, 4.0 g
c)
2 g, 2.5 g, 3 g
d)
1 g, 3 g, 5 g
6.
Three different people weigh a standard mass of 2.00 g on the same balance. Each person obtains a reading of 7.32 g for the mass of the standard. These results imply that the balance that was used is ____.
a)
accurate
b)
precise
c)
accurate and precise
d)
neither accurate nor precise
7.
Which of the following measurements is expressed to three significant figures?
a)
0.007 m
b)
7077 mg
c)
7.30 x 10-7 km
d)
0.070 mm
8.
In the measurement 0.503 L, which digit is the estimated digit?
a)
5
b)
the 0 immediately to the left of the 3
c)
3
d)
the 0 to the left of the decimal point
9.
How many significant figures are in the measurement 40,500 mg?
a)
two
b)
three
c)
four
d)
five
10.
What is the measurement 111.009 mm rounded off to four significant digits?
a)
111 mm
b)
111.0 mm
c)
111.01 mm
d)
110 mm
11.
What is the measurement 1042 L rounded off to two significant digits?
a)
1.0 x 103 L
b)
1040 L
c)
1050 L
d)
1.1 x 103 L
12.
The chief advantage of the metric system over other systems of measurement is that it ____.
a)
has more units
b)
is in multiples of 10
c)
is in French
d)
is derived from nature itself
13.
What is the SI unit of mass?
a)
liter
b)
joule
c)
candela
d)
kilogram
14.
What is the temperature of absolute zero measured in oC?
a)
-373oC
b)
-273oC
c)
-173oC
d)
-73oC
15.
If the temperature changes by 100 K, by how much does it change in oC?
a)
0oC
b)
37oC
c)
100oC
d)
273oC
16.
What is the quantity 0.0075 meters expressed in centimeters?
a)
0.075 cm
b)
0.75 cm
c)
7.5 cm
d)
70.5 cm
17.
What is the quantity 7896 millimeters expressed in meters?
a)
7.896 m
b)
78.96 m
c)
789.6 m
d)
789,600 m
18.
What is the quantity 987 milligrams expressed in grams?
a)
0.000 987 g
b)
0.987 g
c)
9.87 g
d)
98,700 g
19.
What is the density of an object having a mass of 8.0 g and a volume of 25 cm3?
a)
0.32 g/cm3
b)
2.0 g/cm3
c)
3.1 g/cm3
d)
200 g/cm3
20.
What is the volume of 45.6 g of silver if the density of silver is 10.5 g/mL?
a)
0.23 mL
b)
4.34 mL
c)
479 mL
d)
none of the above
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