,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
Supplemental Test Items to accompany OpenStax Chemistry. Note that not all chapters of OpenStax
Chemistry have accompanying test items. Building on the community-oriented nature of OpenStax
resources, we invite you to submit items to be considered for future inclusion.
Chapter 01: Essential Ideas
1. A 0.150 kg metallic block measures 25.0 mm in length, 43.0 mm in width, and 19 .0 mm in
height. What is the density of the metallic block in g/cm3? (Outcome # 3) (DOK 2)
A. 7.34 x 10-6 g/cm3
B. 7.34 x 10-3 g/cm3
C. 7.34 g/cm3*
2. An object with a mass of 0.255 kg and density of 2.89 g/cm3 measures 34 mm in length and
46 mm in width. What is the height of the object? (Outcome # 3) (DOK 3)
A. 5.6 cm*
B. 5.6 x 10-2 cm
C. 7.2 x 10-4 cm
3. How would you determine the density of an irregular object? (Outcome # 3) (DOK 3)
A. It would be impossible to determine the mass of the object without more
information.
B. D = m/v, so measure the mass of the object using a balance. Then to find volume,
measure the height, width, and length using an appropriate measuring tool.
C. D = m/v, so measure the mass of the object using a balance. Then to find volume, fill
a graduated cylinder with a known amount of water and immerse the object in the
water. The amount of displaced water is the volume in cm3 or mL.*
4. What is the base unit for length in the metric system? (Outcome # 6) (DOK 1)
A. m*
B. km
C. mm
5. What is the base unit for mass in the metric system? (Outcome # 6) (DOK 1)
A. kg
B. g*
C. mg
6. What is the base unit for volume in the metric system? (Outcome # 6) (DOK 1)
A. L*
B. mL
C. dL
7. It is important that scientists use units that are understood on a global level. These units are
referred to as SI units which stands for _____. (Outcome # 6) (DOK 1)
A. standard international units
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,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
B. standard intercontinental units
C. international system of units*
8. Convert 18.50 ft to the SI unit for length. (Outcome # 6) (DOK 2)
A. 563.9 cm
B. 5.639 m*
C. 0.005639 km
9. An experimental mouse weighs about 4.41 x 10-2 lbs. What would the weight be in the SI
unit for mass? (Outcome # 6) (DOK 2)
A. 20.0 g
B. 0.0200 kg*
C. 20,003 mg
10. Accuracy is defined as how close a measured value comes to a _____. (Outcome # 6) (DOK
1)
A. core value
B. fixed value
C. true value*
11. Precision is defined as how _____ the measured values are to one another. (Outcome # 6)
(DOK 1)
A. common
B. reproducible*
C. accurate
12. An experiment requires you to make several measurements. Based on the values in the
table below, what would be the best statement that represents the data set if the true
value is 0.2135? (Outcome # 11) (DOK 2)
Trial A Trial B Trial C
0.2139 0.2893 0.2135
0.2130 0.3210 0.2134
0.2133 0.2999 0.3712
0.2135 0.2998 0.3715
A. The measurements in Trial A are accurate and precise, Trial B is neither accurate nor
precise, and Trial C is accurate however, not precise.
B. The measurements in Trial A are accurate and precise, Trial B is neither accurate nor
precise, and Trial C is precise however, not accurate.
C. The measurements in Trial A are accurate and precise, Trial’s B and C are neither
accurate nor precise.*
13. An experiment requires you to make several measurements. Based on the values in the
table below, what would be the best statement that represents the data set if the true
value is 2.73? (Outcome # 11) (DOK 2) (Paired item 1)
Page 2 of 8
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,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
Trial A Trial B Trial C
2.73 3.00 2.77
3.05 3.03 2.79
3.09 2.99 3.31
2.44 3.01 2.05
A. The measurements in Trial B are precise, however, not accurate. Trial’s A and C are
neither accurate nor precise.*
B. The measurements in Trial B are accurate, however, not precise. Trial’s A and C are
neither accurate nor precise.
C. The measurements in Trial’s A, B, and C are neither accurate nor precise.
14. Which of the following would be considered a chemical change? (Outcome # 9) (DOK 1)
A. a rusting nail*
B. melting ice
C. crushing an aluminum can
15. Which of the following would be considered a physical change? (Outcome # 9) (DOK 1)
A. digesting food
B. burning paper
C. boiling water*
16. A salt water solution is classified as what type of matter? (Outcome # 9) (DOK 1)
A. homogeneous mixture*
B. heterogeneous mixture
C. pure substance
17. How many significant figures are in 0.0000401 kg? (Outcome # 5) (DOK 1)
A. 3*
B. 7
C. 2
18. How many significant figures are in 0.20 L? (Outcome # 5) (DOK 1) (Paired item 1)
A. 3
B. 1
C. 2*
19. Express 1.40 x 10-3 L in decimal notation. (Outcome # 5) (DOK 1)
A. 0.00140 L*
B. 0.0014 L
C. 0.001 L
20. What is the answer for the following calculation: (1.249 - 0.0234) x 139.37? (Outcome # 5)
(DOK 2)
A. 170.812
B. 170.8*
Page 3 of 8
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,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
C. 170.81
21. What is the SI unit for mass? (Outcome # 7) (DOK 1)
A. kilogram*
B. gram
C. milligram
22. What is the SI unit for length? (Outcome # 7) (DOK 1)
A. meter*
B. kilometer
C. millimeter
23. What is the SI unit for temperature? (Outcome # 7) (DOK 1)
A. Celsius
B. Fahrenheit
C. kelvin*
24. How many grams of iron are in 350 mg of iron? (Outcome # 7) (DOK 1)
A. 3.50 g
B. 0.350 g*
C. 35.0 g
25. The prefix milli- in the metric system represents a factor of _____. (Outcome # 7) (DOK 1)
A. 103
B. 10-3*
C. 1/10-3
26. The prefix kilo- in the metric system represents a factor of _____. (Outcome # 7) (DOK 1)
A. 103*
B. 10-3
C. 1/103
27. The prefix nano- in the metric system represents a factor of _____. (Outcome # 7) (DOK 1)
A. 109
B. 10-6
C. 10-9*
28. An explanation for the collection of observations is considered a _____. (Outcome # 10)
(DOK 1)
A. theory*
B. law
C. hypothesis
29. A statement about mass always being conserved in a chemical reaction is an example of a
_____. (Outcome # 10) (DOK 1)
A. hypothesis
B. theory
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,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
C. law*
30. The scientific method involves various techniques which allow researchers to investigate
scientific questions through _____ and _____. (Outcome # 10) (DOK 1)
A. analysis and observations
B. observations and experimentation*
C. analysis and predictions
31. Why has Galileo been called the father of modern science? (Outcome # 10) (DOK 1)
A. because he made observations and conducted experiments*
B. because he discovered electrochemical cells
C. because he was a philosopher
32. List the basic steps of the scientific method process in the order they must be carried out.
(Outcome # 10) (DOK 1)
A. observation, hypothesis, prediction, experimentation, and conclusion*
B. hypothesis, observation, prediction, experimentation, and conclusion
C. prediction, observation, hypothesis, experimentation, and conclusion
33. Which of the following is not part of the scientific method process? (Outcome # 10) (DOK 1)
A. observation
B. prediction
C. discussion*
34. Which of the following would be a good example of an observation in the scientific method
process? (Outcome # 10) (DOK 2)
A. a researcher watching a chemical reaction
B. a researcher watching a chemical reaction and noting color and temperature
changes*
C. a researcher setting up a chemical reaction in a flask and allowing it to stir for 2
hours
35. Which of the following would be a good example of an observation in the scientific method
process? (Outcome # 10) (DOK 2) (Paired item 1)
A. a physician observing a patient's reaction to some medication*
B. a physician observing his watch
C. a physician speaking with and observing a patient in an examination room
36. Which of the following would be good tools for making scientific observations during a
chemical reaction? (Outcome # 10) (DOK 2)
A. barometer, thermometer, scale
B. thermometer, your eyes, clock*
C. thermometer, your eyes, tape measure
37. Which of the following would be a good tool for making scientific observations after
isolating a solid product from a chemical reaction? (Outcome # 10) (DOK 2)
Page 5 of 8
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from the William and Flora Hewlett Foundation. Licensed Creative Commons Attribution 4.0.
,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
A. balance*
B. clock
C. tape measure
38. What can be used to measure the mass of an object? (Outcome # 10) (DOK 1)
A. balance*
B. tape measure
C. caliper
39. Which of the following would be a good example of a hypothesis in the scientific method
process? (Outcome # 10) (DOK 3)
A. a researcher considers that the more sunlight a green plant receives, the larger the
plant will grow*
B. a researcher wonders amount the effect of more sunlight on green plant growth
C. a researcher watches as a green plant exposed to more sunlight grows over a period
of 1 month
40. Which of the following would be a good example of a hypothesis in the scientific method
process? (Outcome # 10) (DOK 3) (Paired item 1)
A. a clinician confirms that taking a vitamin every day will decrease the level of
tiredness in people
B. a clinician tells a patient that taking a vitamin every day, may decrease the level of
tiredness in people
C. a clinician contemplates that taking a vitamin every day, may decrease the level of
tiredness in people*
41. Which of the following would be a good example of a hypothesis in the scientific method
process? (Outcome # 10) (DOK 3) (Paired item 2)
A. a botanist adds 20 mL of water to his plants on a daily basis and he notices a healthy
growth, therefore, he believes that adding 40 mL of water on a daily basis will
enhance their growth further*
B. a botanist adds 20 mL of water to his plants on a daily basis and he notices a healthy
growth
C. a botanist adds 20 mL of water to his plants on a daily basis and he notices a healthy
growth, therefore, adding 40 mL of water on a daily basis will definitely enhance
their growth further
42. Once a hypothesis has been established, it can be tested by conducting an _____. (Outcome
# 10) (DOK 1)
A. observation
B. experiment*
C. analysis
43. Which statement is correct about the scientific method process? (Outcome # 10) (DOK 1)
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,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
A. after testing a hypothesis, a conclusion can be drawn on whether it will be accepted
or rejected*
B. after testing an observation, a conclusion can be drawn on whether it will be
accepted or rejected
C. after testing a conclusion, it can be predicted whether a hypothesis will be accepted
or rejected
44. Why is chemistry considered a central science? (Outcome # 10) (DOK 1)
A. because it is a core course required for most majors in college
B. because it is the fundamental science for many other disciplines*
C. because it is very important in medicine
45. What is applied research? (Outcome # 10) (DOK 1)
A. it deals primarily with solving practical real-world problems*
B. it deals primarily with solving practical laboratory problems
C. it deals primarily with the fundamentals of science that may result in future
applications
46. What is basic research? (Outcome # 10) (DOK 1)
A. it deals primarily with solving practical real-world problems
B. it deals primarily with the fundamentals of science that may result in future
applications*
C. it deals primarily with solving practical laboratory problems
47. Which of the following is an example of applied research? (Outcome # 10) (DOK 2)
A. a researcher tries to develop a new anti-cancer drug*
B. a researcher tries to extract a newly found natural product from plants to study its
medicinal properties
C. a researcher studies a hormone and its prospect as a cell signaling molecule
48. Which of the following is an example of applied research? (Outcome # 10) (DOK 2) (Paired
item 1)
A. a researcher tries to extract a newly found natural product from plants to study its
medicinal properties
B. a researcher tries to study the effect of a new drug on HIV-inhibition*
C. a researcher studies a hormone and its prospect as a cell signaling molecule
49. Which of the following is an example of basic research? (Outcome # 10) (DOK 2)
A. a researcher tries to study the effect of a new drug on HIV-inhibition
B. a researcher tries to develop a new anti-cancer drug
C. a researcher studies a hormone and its prospect as a cell signaling molecule*
50. Which is of the following is an example of a physical property? (Outcome # 10) (DOK 1)
A. carbon monoxide is poisonous
B. acids are sour and bases are bitter*
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,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
C. an iron nail rusts
51. Which is of the following is an example of a physical property? (Outcome # 10) (DOK 1)
(Paired item 1)
A. water freezes at 273.15 K*
B. carbon monoxide is poisonous
C. an iron nail rusts
52. Which is of the following is an example of a physical property? (Outcome # 10) (DOK 1)
(Paired item 2)
A. lead forming lead oxide in the presence of air
B. the color of paint*
C. digestion
53. Which is of the following is an example of a chemical property? (Outcome # 10) (DOK 1)
A. water boils at 100 °C
B. acids are sour and bases are bitter
C. an iron nail rusts*
54. Which is of the following is an example of a chemical property? (Outcome # 10) (DOK 1)
(Paired item 1)
A. water boils at 100 °C
B. carbon monoxide is poisonous*
C. a copper penny weighs 3.00 g
55. The following is an example of a chemical change. (Outcome # 10) (DOK 1)
A. cutting paper
B. burning paper*
C. folding paper
56. The following is an example of a chemical change. (Outcome # 10) (DOK 1) (Paired item 1)
A. shredding paper
B. decomposing waste*
C. dissolving sugar
57. A website claims that there is a natural cure for all cancers; however, doctors do not want
to recommend natural remedies because it would make them obsolete. Is this statement
logical? (Outcome # 10) (DOK 3)
A. yes, doctors can cure all patients
B. yes, doctors can cure some patients with natural remedies
C. no, doctors cannot cure all patients and regardless of treatment, some patients still
remain ill and die*
Page 8 of 8
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, OpenStax ChemistryAF Supplemental Test Items
Chapter 02: Atoms, Molecules, and Ions
Supplemental Test Items to accompany OpenStax Chemistry. Note that not all chapters of OpenStax
Chemistry have accompanying test items. Building on the community-oriented nature of OpenStax
resources, we invite you to submit items to be considered for future inclusion.
Chapter 02: Atoms, Molecules, and Ions
1. Structural isomers are considered molecules with the same ____________. (Outcome #
1,5,9) DOK 1
A. kinds and number of atoms but a different arrangement of these atoms*
B. number of electrons and protons but a different number of neutrons
C. molecular formula but with a different overall charge
2. Which of the following is not a correct element name-symbol combination? (Outcome # 1)
DOK 1
A. copper, Cu
B. arsenic, Ar*
C. gold, Au
3. Isotopes of carbon differ with respect to the number of _________. (Outcome # 1,8) DOK 1
A. protons
B. neutrons*
C. electrons
4. Elements in group 17 are considered _____________. (Outcome # 1,2) DOK 1
A. alkali Metals
B. halogens*
C. noble Gases
5. Due to periodicity, which of the following elements has chemical behavior similar to that of
Oxygen? (Outcome # 1,2,8) DOK 1
A. bromine
B. sulfur*
C. carbon
6. Where would you expect to find a stored bottle of HCl in the laboratory? (Outcome # 5)
(DOK 1)
A. in the storage cabinet labeled strong bases
B. in the storage cabinet labeled strong acids*
C. in the storage cabinet labeled solvents
7. Where would you expect to find a stored bottle of NaOH in the laboratory? (Outcome # 5)
(DOK 1) (Paired item 1)
A. in the storage cabinet labeled strong bases*
B. in the storage cabinet labeled strong acids
C. in the storage cabinet labeled solvents
Page 1 of 7
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from the William and Flora Hewlett Foundation. Licensed Creative Commons Attribution 4.0.
Chapter 01: Essential Ideas
Supplemental Test Items to accompany OpenStax Chemistry. Note that not all chapters of OpenStax
Chemistry have accompanying test items. Building on the community-oriented nature of OpenStax
resources, we invite you to submit items to be considered for future inclusion.
Chapter 01: Essential Ideas
1. A 0.150 kg metallic block measures 25.0 mm in length, 43.0 mm in width, and 19 .0 mm in
height. What is the density of the metallic block in g/cm3? (Outcome # 3) (DOK 2)
A. 7.34 x 10-6 g/cm3
B. 7.34 x 10-3 g/cm3
C. 7.34 g/cm3*
2. An object with a mass of 0.255 kg and density of 2.89 g/cm3 measures 34 mm in length and
46 mm in width. What is the height of the object? (Outcome # 3) (DOK 3)
A. 5.6 cm*
B. 5.6 x 10-2 cm
C. 7.2 x 10-4 cm
3. How would you determine the density of an irregular object? (Outcome # 3) (DOK 3)
A. It would be impossible to determine the mass of the object without more
information.
B. D = m/v, so measure the mass of the object using a balance. Then to find volume,
measure the height, width, and length using an appropriate measuring tool.
C. D = m/v, so measure the mass of the object using a balance. Then to find volume, fill
a graduated cylinder with a known amount of water and immerse the object in the
water. The amount of displaced water is the volume in cm3 or mL.*
4. What is the base unit for length in the metric system? (Outcome # 6) (DOK 1)
A. m*
B. km
C. mm
5. What is the base unit for mass in the metric system? (Outcome # 6) (DOK 1)
A. kg
B. g*
C. mg
6. What is the base unit for volume in the metric system? (Outcome # 6) (DOK 1)
A. L*
B. mL
C. dL
7. It is important that scientists use units that are understood on a global level. These units are
referred to as SI units which stands for _____. (Outcome # 6) (DOK 1)
A. standard international units
Page 1 of 8
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,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
B. standard intercontinental units
C. international system of units*
8. Convert 18.50 ft to the SI unit for length. (Outcome # 6) (DOK 2)
A. 563.9 cm
B. 5.639 m*
C. 0.005639 km
9. An experimental mouse weighs about 4.41 x 10-2 lbs. What would the weight be in the SI
unit for mass? (Outcome # 6) (DOK 2)
A. 20.0 g
B. 0.0200 kg*
C. 20,003 mg
10. Accuracy is defined as how close a measured value comes to a _____. (Outcome # 6) (DOK
1)
A. core value
B. fixed value
C. true value*
11. Precision is defined as how _____ the measured values are to one another. (Outcome # 6)
(DOK 1)
A. common
B. reproducible*
C. accurate
12. An experiment requires you to make several measurements. Based on the values in the
table below, what would be the best statement that represents the data set if the true
value is 0.2135? (Outcome # 11) (DOK 2)
Trial A Trial B Trial C
0.2139 0.2893 0.2135
0.2130 0.3210 0.2134
0.2133 0.2999 0.3712
0.2135 0.2998 0.3715
A. The measurements in Trial A are accurate and precise, Trial B is neither accurate nor
precise, and Trial C is accurate however, not precise.
B. The measurements in Trial A are accurate and precise, Trial B is neither accurate nor
precise, and Trial C is precise however, not accurate.
C. The measurements in Trial A are accurate and precise, Trial’s B and C are neither
accurate nor precise.*
13. An experiment requires you to make several measurements. Based on the values in the
table below, what would be the best statement that represents the data set if the true
value is 2.73? (Outcome # 11) (DOK 2) (Paired item 1)
Page 2 of 8
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,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
Trial A Trial B Trial C
2.73 3.00 2.77
3.05 3.03 2.79
3.09 2.99 3.31
2.44 3.01 2.05
A. The measurements in Trial B are precise, however, not accurate. Trial’s A and C are
neither accurate nor precise.*
B. The measurements in Trial B are accurate, however, not precise. Trial’s A and C are
neither accurate nor precise.
C. The measurements in Trial’s A, B, and C are neither accurate nor precise.
14. Which of the following would be considered a chemical change? (Outcome # 9) (DOK 1)
A. a rusting nail*
B. melting ice
C. crushing an aluminum can
15. Which of the following would be considered a physical change? (Outcome # 9) (DOK 1)
A. digesting food
B. burning paper
C. boiling water*
16. A salt water solution is classified as what type of matter? (Outcome # 9) (DOK 1)
A. homogeneous mixture*
B. heterogeneous mixture
C. pure substance
17. How many significant figures are in 0.0000401 kg? (Outcome # 5) (DOK 1)
A. 3*
B. 7
C. 2
18. How many significant figures are in 0.20 L? (Outcome # 5) (DOK 1) (Paired item 1)
A. 3
B. 1
C. 2*
19. Express 1.40 x 10-3 L in decimal notation. (Outcome # 5) (DOK 1)
A. 0.00140 L*
B. 0.0014 L
C. 0.001 L
20. What is the answer for the following calculation: (1.249 - 0.0234) x 139.37? (Outcome # 5)
(DOK 2)
A. 170.812
B. 170.8*
Page 3 of 8
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from the William and Flora Hewlett Foundation. Licensed Creative Commons Attribution 4.0.
,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
C. 170.81
21. What is the SI unit for mass? (Outcome # 7) (DOK 1)
A. kilogram*
B. gram
C. milligram
22. What is the SI unit for length? (Outcome # 7) (DOK 1)
A. meter*
B. kilometer
C. millimeter
23. What is the SI unit for temperature? (Outcome # 7) (DOK 1)
A. Celsius
B. Fahrenheit
C. kelvin*
24. How many grams of iron are in 350 mg of iron? (Outcome # 7) (DOK 1)
A. 3.50 g
B. 0.350 g*
C. 35.0 g
25. The prefix milli- in the metric system represents a factor of _____. (Outcome # 7) (DOK 1)
A. 103
B. 10-3*
C. 1/10-3
26. The prefix kilo- in the metric system represents a factor of _____. (Outcome # 7) (DOK 1)
A. 103*
B. 10-3
C. 1/103
27. The prefix nano- in the metric system represents a factor of _____. (Outcome # 7) (DOK 1)
A. 109
B. 10-6
C. 10-9*
28. An explanation for the collection of observations is considered a _____. (Outcome # 10)
(DOK 1)
A. theory*
B. law
C. hypothesis
29. A statement about mass always being conserved in a chemical reaction is an example of a
_____. (Outcome # 10) (DOK 1)
A. hypothesis
B. theory
Page 4 of 8
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from the William and Flora Hewlett Foundation. Licensed Creative Commons Attribution 4.0.
,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
C. law*
30. The scientific method involves various techniques which allow researchers to investigate
scientific questions through _____ and _____. (Outcome # 10) (DOK 1)
A. analysis and observations
B. observations and experimentation*
C. analysis and predictions
31. Why has Galileo been called the father of modern science? (Outcome # 10) (DOK 1)
A. because he made observations and conducted experiments*
B. because he discovered electrochemical cells
C. because he was a philosopher
32. List the basic steps of the scientific method process in the order they must be carried out.
(Outcome # 10) (DOK 1)
A. observation, hypothesis, prediction, experimentation, and conclusion*
B. hypothesis, observation, prediction, experimentation, and conclusion
C. prediction, observation, hypothesis, experimentation, and conclusion
33. Which of the following is not part of the scientific method process? (Outcome # 10) (DOK 1)
A. observation
B. prediction
C. discussion*
34. Which of the following would be a good example of an observation in the scientific method
process? (Outcome # 10) (DOK 2)
A. a researcher watching a chemical reaction
B. a researcher watching a chemical reaction and noting color and temperature
changes*
C. a researcher setting up a chemical reaction in a flask and allowing it to stir for 2
hours
35. Which of the following would be a good example of an observation in the scientific method
process? (Outcome # 10) (DOK 2) (Paired item 1)
A. a physician observing a patient's reaction to some medication*
B. a physician observing his watch
C. a physician speaking with and observing a patient in an examination room
36. Which of the following would be good tools for making scientific observations during a
chemical reaction? (Outcome # 10) (DOK 2)
A. barometer, thermometer, scale
B. thermometer, your eyes, clock*
C. thermometer, your eyes, tape measure
37. Which of the following would be a good tool for making scientific observations after
isolating a solid product from a chemical reaction? (Outcome # 10) (DOK 2)
Page 5 of 8
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from the William and Flora Hewlett Foundation. Licensed Creative Commons Attribution 4.0.
,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
A. balance*
B. clock
C. tape measure
38. What can be used to measure the mass of an object? (Outcome # 10) (DOK 1)
A. balance*
B. tape measure
C. caliper
39. Which of the following would be a good example of a hypothesis in the scientific method
process? (Outcome # 10) (DOK 3)
A. a researcher considers that the more sunlight a green plant receives, the larger the
plant will grow*
B. a researcher wonders amount the effect of more sunlight on green plant growth
C. a researcher watches as a green plant exposed to more sunlight grows over a period
of 1 month
40. Which of the following would be a good example of a hypothesis in the scientific method
process? (Outcome # 10) (DOK 3) (Paired item 1)
A. a clinician confirms that taking a vitamin every day will decrease the level of
tiredness in people
B. a clinician tells a patient that taking a vitamin every day, may decrease the level of
tiredness in people
C. a clinician contemplates that taking a vitamin every day, may decrease the level of
tiredness in people*
41. Which of the following would be a good example of a hypothesis in the scientific method
process? (Outcome # 10) (DOK 3) (Paired item 2)
A. a botanist adds 20 mL of water to his plants on a daily basis and he notices a healthy
growth, therefore, he believes that adding 40 mL of water on a daily basis will
enhance their growth further*
B. a botanist adds 20 mL of water to his plants on a daily basis and he notices a healthy
growth
C. a botanist adds 20 mL of water to his plants on a daily basis and he notices a healthy
growth, therefore, adding 40 mL of water on a daily basis will definitely enhance
their growth further
42. Once a hypothesis has been established, it can be tested by conducting an _____. (Outcome
# 10) (DOK 1)
A. observation
B. experiment*
C. analysis
43. Which statement is correct about the scientific method process? (Outcome # 10) (DOK 1)
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,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
A. after testing a hypothesis, a conclusion can be drawn on whether it will be accepted
or rejected*
B. after testing an observation, a conclusion can be drawn on whether it will be
accepted or rejected
C. after testing a conclusion, it can be predicted whether a hypothesis will be accepted
or rejected
44. Why is chemistry considered a central science? (Outcome # 10) (DOK 1)
A. because it is a core course required for most majors in college
B. because it is the fundamental science for many other disciplines*
C. because it is very important in medicine
45. What is applied research? (Outcome # 10) (DOK 1)
A. it deals primarily with solving practical real-world problems*
B. it deals primarily with solving practical laboratory problems
C. it deals primarily with the fundamentals of science that may result in future
applications
46. What is basic research? (Outcome # 10) (DOK 1)
A. it deals primarily with solving practical real-world problems
B. it deals primarily with the fundamentals of science that may result in future
applications*
C. it deals primarily with solving practical laboratory problems
47. Which of the following is an example of applied research? (Outcome # 10) (DOK 2)
A. a researcher tries to develop a new anti-cancer drug*
B. a researcher tries to extract a newly found natural product from plants to study its
medicinal properties
C. a researcher studies a hormone and its prospect as a cell signaling molecule
48. Which of the following is an example of applied research? (Outcome # 10) (DOK 2) (Paired
item 1)
A. a researcher tries to extract a newly found natural product from plants to study its
medicinal properties
B. a researcher tries to study the effect of a new drug on HIV-inhibition*
C. a researcher studies a hormone and its prospect as a cell signaling molecule
49. Which of the following is an example of basic research? (Outcome # 10) (DOK 2)
A. a researcher tries to study the effect of a new drug on HIV-inhibition
B. a researcher tries to develop a new anti-cancer drug
C. a researcher studies a hormone and its prospect as a cell signaling molecule*
50. Which is of the following is an example of a physical property? (Outcome # 10) (DOK 1)
A. carbon monoxide is poisonous
B. acids are sour and bases are bitter*
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,OpenStax ChemistryAF Supplemental Test Items
Chapter 01: Essential Ideas
C. an iron nail rusts
51. Which is of the following is an example of a physical property? (Outcome # 10) (DOK 1)
(Paired item 1)
A. water freezes at 273.15 K*
B. carbon monoxide is poisonous
C. an iron nail rusts
52. Which is of the following is an example of a physical property? (Outcome # 10) (DOK 1)
(Paired item 2)
A. lead forming lead oxide in the presence of air
B. the color of paint*
C. digestion
53. Which is of the following is an example of a chemical property? (Outcome # 10) (DOK 1)
A. water boils at 100 °C
B. acids are sour and bases are bitter
C. an iron nail rusts*
54. Which is of the following is an example of a chemical property? (Outcome # 10) (DOK 1)
(Paired item 1)
A. water boils at 100 °C
B. carbon monoxide is poisonous*
C. a copper penny weighs 3.00 g
55. The following is an example of a chemical change. (Outcome # 10) (DOK 1)
A. cutting paper
B. burning paper*
C. folding paper
56. The following is an example of a chemical change. (Outcome # 10) (DOK 1) (Paired item 1)
A. shredding paper
B. decomposing waste*
C. dissolving sugar
57. A website claims that there is a natural cure for all cancers; however, doctors do not want
to recommend natural remedies because it would make them obsolete. Is this statement
logical? (Outcome # 10) (DOK 3)
A. yes, doctors can cure all patients
B. yes, doctors can cure some patients with natural remedies
C. no, doctors cannot cure all patients and regardless of treatment, some patients still
remain ill and die*
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, OpenStax ChemistryAF Supplemental Test Items
Chapter 02: Atoms, Molecules, and Ions
Supplemental Test Items to accompany OpenStax Chemistry. Note that not all chapters of OpenStax
Chemistry have accompanying test items. Building on the community-oriented nature of OpenStax
resources, we invite you to submit items to be considered for future inclusion.
Chapter 02: Atoms, Molecules, and Ions
1. Structural isomers are considered molecules with the same ____________. (Outcome #
1,5,9) DOK 1
A. kinds and number of atoms but a different arrangement of these atoms*
B. number of electrons and protons but a different number of neutrons
C. molecular formula but with a different overall charge
2. Which of the following is not a correct element name-symbol combination? (Outcome # 1)
DOK 1
A. copper, Cu
B. arsenic, Ar*
C. gold, Au
3. Isotopes of carbon differ with respect to the number of _________. (Outcome # 1,8) DOK 1
A. protons
B. neutrons*
C. electrons
4. Elements in group 17 are considered _____________. (Outcome # 1,2) DOK 1
A. alkali Metals
B. halogens*
C. noble Gases
5. Due to periodicity, which of the following elements has chemical behavior similar to that of
Oxygen? (Outcome # 1,2,8) DOK 1
A. bromine
B. sulfur*
C. carbon
6. Where would you expect to find a stored bottle of HCl in the laboratory? (Outcome # 5)
(DOK 1)
A. in the storage cabinet labeled strong bases
B. in the storage cabinet labeled strong acids*
C. in the storage cabinet labeled solvents
7. Where would you expect to find a stored bottle of NaOH in the laboratory? (Outcome # 5)
(DOK 1) (Paired item 1)
A. in the storage cabinet labeled strong bases*
B. in the storage cabinet labeled strong acids
C. in the storage cabinet labeled solvents
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