Scientific Measurement PRACTICE Test
Multiple Choice: Identify the choice that best completes the statement or answers the question.
____
____
1. The symbols for units of length in order from largest to smallest are
a. m, cm, mm, km
b. mm, m, cm, km. c. km, mm, cm, m.
2. The SI units for length and Temperature are
a. centimeter and Fahrenheit.
b. meter and Fahrenheit.
d. km, m, cm, mm.
c. centimeter and Celsius.
d. meter and Celsius.
____
3. How is the measurement 0.000 065 cm written in scientific notation?
a. 65  10–6 cm
b. 6.5  10–5 cm
c. 6.5  10–6 cm
d. 6.5  10–4 cm
____
4. Which of these symbols represents a unit of volume?
a. mL
b. Mg
c. mm
d. cm
____
5. If you are measuring water in a graduated cylinder that reads to the ones place, all your measurements must
be recorded to the ________ place.
a. tens
b. Ones
c. tenths
d. hundredths
____
6. All of the following units are units of measurement, EXCEPT
a. gram.
b. kilometer.
c. volume.
d. ounce.
____
7. Which of these answers show 29,990 rounded to three significant figures?
a. 29,900
b. 29,000
c. 30,000
d. 3.00 x 104
____
8. For which of these measurements are all the zeros significant?
a. 0.0037 mL
b. 60.0 mL
c. 400 mL
d. 0.506 mL
9. Which of these is a measure of the amount of matter?
a. density
b. Weight
c. volume
d. mass
____
____ 10. The number of significant figures in the measurement 0.0005050 kg is
a. 2.
b. 3.
c. 4.
d. 7.
____ 11. The density of an object is calculated by
a. multiplying its mass times its volume.
b. dividing its mass by its volume.
c. dividing its volume by its mass.
d. adding its mass to its volume.
____ 12. The symbol GL represents
a. grams.
b. gigaliter.
c. gigagram.
d. grams/liter.
____ 13. All of the following are units for density except
a. kg/m3.
b. kg/L.
c. g/cm3.
d. g/m2.
____ 14. The unit m3 measures
a. length.
b. area.
c. volume.
d. time.
____ 15. A volume of 1 milliliter is equivalent to
a. 1 cubic centimeter.
b. 1 gram.
c. 1 liter.
d. 10–1 cubic decimeters.
____ 16. The estimated digit in the measurement 8170 cm is:
a. 8
b. 1
c. 7
d. 0
____ 17. The SI base unit for time is the
a. day.
b. hour.
d. second.
c. minute.
____ 18. When 1.92  10–6 kg is divided by 6.8  102 mL, the quotient equals
a. 2.8  10–4 kg/mL. b. 2.8  10–5 kg/mL. c. 2.8  10–8 kg/mL. d. 2.8  10–9 kg/mL.
____ 19. When 6.02  1023 is multiplied by 9.1  10–31, the product is NO GOOD ANSWER.
a. 4.3  10–8.
b. 4.3  1054.
c. 4.3  10–7.
d. 4.3  10–53.
-7
ENTER: 6.02 EE 23 X 9.1 EE 31 +/- = 5.5 X 10
Essay
20. The table below show measurements made on samples of three unknown materials. Explain how this data
could be used to identify the three materials.
Mass and Volume Data
Material
Mass (g)
Volume (mL)
1
6.02
2.23
2
18.42
2.34
3
35.15
3.10
Problem: For the following problems, show the values plugged into the formula, any steps used to simplify, and circle
all answers. Sig Figs & units count!
FOR CONVERSIONS : show all conversion factors & show units cancelling!!!
21. Three samples of 1.12 g, 1.8 g, and 1.562 g are mixed together. The combined mass of the three samples,
expressed to the correct number of significant figures, would be recorded as
22. Using a metric ruler with 1 mm divisions, the sides of a block of wood were measured as 3.54 cm, 2.7 cm,
and 4.85 cm. Calculate the volume of this piece of wood. (V = l x w x h)
23. 0.05 m is the same as how many dm?
24. Density of mercury is 13.5 g/mL. What is the mass of a a sample of mercury with a volume=1.50 mL?
25. When 3.91  1018 is divided by 7.2  10–3, the quotient is
26. The measurement 2.1 ML is the same as how many liters?
27. A sample of an unknown liquid has a mass of 96.5 g and a volume of 2.89 mL. The density is
28. The density of lead is 11.3 g/cm3. What is the volume of a piece of lead with a mass of 0.25 g?
Scientific Measurement PRACTICE Test
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
5.
6.
7.
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
D
D
B
A
C
C
D
8.
9.
10.
11.
12.
13.
14.
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
B
D
C
B
B
D
C
15.
16.
17.
18.
19.
ANS:
ANS:
ANS:
ANS:
ANS:
A
C
D
D
C
ESSAY
20. ANS: The density of each sample could be calculated. Then each value could be compared to known values
to identify the substances.
PROBLEM
21. ANS:
1.12 g
1.8 g
+1.562 g
4.482 g
= 4.5 g
22. ANS:
A = (3.54 cm) (2.7cm)(4.85 cm)
A = 46.3563 cm3
A = 46 cm3
23. ANS:
0.05 m
x
101 dm = 5 x 10-1 dm or 0.5 dm
1m
NOTE: Plug this in very carefully, as shown below:
0.05 x 1 EE 1 =
24. ANS:
M=DxV
M = (13.5 g/mL) (1.50 mL)
M = 20.3 g
25. ANS:
5.4 x 1020
(plug this into your calculator: 6.02 EE 23 x 9.1 EE -31 )
26. ANS:
2.1 ML
x 106 L
= 2.1 x 106 L
1 ML
27. ANS:
D = M/V
D = 96.5 g/2.89 cm3
D = 33.4 g/cm3
28. ANS:
V =M/D
V = 0.25 g
11.3 g/cm3
V = 0.071428571
V = 0.022 cm3