Introductory Chemistry 9th Edition Zumdahl Test Bank

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Chapter 01 - Chemistry: An Introduction
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,Name Clas Dat
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Chapter 01 - Chemistry: An Introduction
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Define the following terms:
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a. science
b. chemistry
ANSWER: a. Science - fx fx


a framework for gaining and organizing knowledge. It is a procedure for processing and understan
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ding certain information. fx fx


b. Chemistry - the science that deals with the matter of the universe and the changes it can undergo.
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2. Define the following terms:
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a. scientific method fx


b. natural law fx


c. hypothesis
d. theory
ANSWER: a. Scientific method - the process or steps of scientific inquiry.
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b. Natural law - a statement describing observed beha or. fx fx fx fx fx fx fx fx


c. Hypothesis - a possible explanation for an observation. fx fx fx fx fx fx fx


d. Theory - fx


a set of testsed hypotheses that gives an explanation for some beha or or observation (also called
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a model). x fx




3. Which of the following is not a step in the scientific method?
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a. Make an observation. fx fx


b. Formulate a hypothesis. fx fx


c. Perform an experiment. fx fx


d. Change results to agree with your hypothesis.
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e. Develop a theory (or model). fx fx fx fx


ANSWER: d

4. A fx is a summary of observed beha or, and a
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a. law, measurement fx



b. theory, scientific method fx fx



c. theory, law fx


d. law, theory fx


e. hypothesis, theory fx



ANSWER: d

5. Generally, observed beha or that can be formulated into a statement, sometimes mathematical in nature, is
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called a(n)
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a. observation
b. measurement
c. theory
d. natural law fx



e. experiment
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,Name Clas Dat
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: s: e:

Chapter 01 - Chemistry: An Introduction
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ANSWER: d




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.

, Name Clas Dat
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: s: e:

Chapter 01 - Chemistry: An Introduction
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6. The statement “The total mass of materials is not affected by a chemical change in those materials” is calle
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d a(n)
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a. observation
b. measurement
c. theory
d. natural law fx



e. experiment
ANSWER: d

7. A set of tested hypotheses than gives an overall explanation of some part of nature, is called a(n)
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a. observation
b. measurement
c. theory
d. natural law fx


e. experiment
ANSWER: c

8. Something done to test a hypothesis that produces new observations is called a(n)
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a. observation
b. measurement
c. theory
d. natural law fx


e. experiment
ANSWER: e

9. A quantitative observation
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a. contains a number and a unit fx fx fx fx fx


b. does not contain a number
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c. always makes a comparison fx fx fx



d. must be obtained through experimentation
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e. is none of these
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ANSWER: a

10. Which of the following is an example of a quantitative observation?
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a. The piece of metal is longer than the piece of wood.
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b. Solution 1 is much darker than solution 2. fx fx fx fx fx fx fx



c. The liquid in beaker A is blue.
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d. The temperature of the liquid is 60°C.
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e. At least two of the above (A-D) are quantitative observations.
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ANSWER: d

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