Chapter 2:
Data Analysis
Practice Test
1.
What is the area in square millimeters of a rectangle that is 7.431 cm long and 23.33 mm wide?
a.
173.4 mm
2
b.
1.734 mm
2
c.
1734 mm
2
d.
17.34 mm
2
Hint
2.
Which of the following numbers has 4 significant figures?
a.
0.0520
b.
0.05208
c.
0.52089
d.
0.0521
Hint
3.
In the SI system of measurement, there are seven ________ units.
a.
metric
b.
derived
c.
base
d.
English
Hint
4.
A measure of the closeness of a series of measurements is their ___________ .
a.
precision
b.
percent error
c.
error
d.
accuracy
Hint
5.
The closeness of an experimental value to an accepted value is its ______.
a.
percent error
b.
accuracy
c.
precision
d.
error
Hint
6.
How many milliliters are there in 1.0 microliter?
a.
1.0 × 10
-2
mL
b.
1.0 × 10
-1
mL
c.
1.0 × 10
-3
mL
d.
1.0 × 10
-4
mL
Hint
7.
Below is a list of
physical properties
and the
base unit
in the SI system used to measure each property. Which unit is not the correct base unit?
a.
time----------second
b.
mass----------gram
c.
temperature----------kelvin
d.
length----------meter
Hint
8.
What scale provides the base unit for temperature in the SI system?
a.
Kelvin scale
b.
Fahrenheit scale
c.
Centigrade scale
d.
Celsius scale
Hint
9.
What volume is occupied by 16.4 g of mercury? The density of mercury is 13.6 g/mL.
a.
1.21 mL
b.
223 mL
c.
30.0 mL
d.
0.829 mL
Hint
10.
The representation of data on graph that resembles a pizza is a _________.
a.
circle graph
b.
bar graph
c.
inverse
d.
line graph
Hint
11.
The sum of 4.824 + 2.03 + 4.72319 + 123.4567 + 111.1 expressed to the proper number of significant figures is ____________.
a.
246.1
b.
246.13
c.
246.134
d.
246
Hint
12.
Which of the following is not a significant figure?
a.
a value of 1 through 9
b.
zeros to the right of a significant digit when a decimal point is present
c.
zeros to the left of the first significant digit
d.
a zero between two digits that have values of 1 through 9
Hint
13.
What is the temperature 51°C expressed in kelvins?
a.
326 K
b.
222 K
c.
273.0 K
d.
324 K
Hint
14.
How many kilograms of lead are present in 426 pounds of lead? Each kilogram contains 2.20 pounds.
a.
193.6 kg
b.
194 kg
c.
937.2 kg
d.
937 kg
Hint
15.
Perform the indicated mathematical operations and report the answer to the proper number of significant figures.
( 21.55 × 4.12 ) ÷42.42
a.
2.09
b.
2.093
c.
2.1
d.
2.0930
Hint
16.
What is the percent error if a measured value is 24.59 g/mL and the accepted value is 25.49 g/mL?
a.
96.47%
b.
103.7%
c.
3.531%
d.
3.66%
Hint
17.
What is the density of a sample with a mass of 24.47 g and a volume of 13.2 mL?
a.
1.8537 g/mL
b.
1.9 g/mL
c.
1.854 g/mL
d.
1.85 g/mL
Hint
18.
Dimensional analysis is a method of problem-solving that focuses on ________ .
a.
accuracy
b.
precision
c.
error
d.
units
Hint
19.
Below is a list of common prefixes used in the SI and metric systems. Included with each is an abbreviation and a definition. Which set contains an error?
a.
deci------d------10
-1
b.
mega------m------10
6
c.
centi------c------10
-2
d.
micro------
------10
-6
Hint
20.
A unit that is defined by a combination of base units is a(n) __________.
a.
metric unit
b.
SI unit
c.
English unit
d.
derived unit
Hint
