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Chemistry in Focus A Molecular View of Our World 6th Edition by Nivaldo J. Tro - Test Bank
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Chemistry in Focus A Molecular View of Our World 6th Edition by Nivaldo J. Tro - Test Bank
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,Chapter 01 - Molecular Reasons1. Which of these is the best definition of matter?
a. The pull of gravity on an object.
b. Anything that has weight and volume.
c. Anything that has mass and occupies space.
d. Anything that is directly proportional to weight.
e. The measure of the amount of space an object occupies.
ANSWER: c
POINTS: 1
2. Which of these statements is correct?
a. The amount of carbon on earth is essentially constant.
b. The amount of carbon on earth fluctuates with the seasons.
c. The amount of carbon on earth is increasing due to plant and animal growth.
d. The amount of carbon on earth is decreasing due to consumption of carbon based fuels.
e. Both B and C are correct.
ANSWER: a
POINTS: 1
3. The French chemist Antoine Lavoisier found that the weight of objects before burning and the weight of the products
after burning were equal. He concluded that the total weight did not change during a process. Which of these best
describes Lavoisier's conclusion?
a. From observation, Lavoisier created a scientific law.
b. From observation, Lavoisier created a scientific theory.
c. From scientific law, Lavoisier created a scientific theory.
d. From experimentation, Lavoisier created a scientific law.
e. From observation, Lavoisier created a scientific conclusion.
ANSWER: a
POINTS: 1
4. When using the scientific method, before experiments are done a ___________ should be established.
a. hypothesis
b. law
c. theory
d. conclusion
ANSWER: a
POINTS: 1
5. A statement which summarizes the data obtained from a series of observations is known as a(n) ____.
a. observation
b. law
c. theory
d. conclusion
e. experiment
ANSWER: b
POINTS: 1
Cengage Learning Testing, Powered by Cognero Page 1
,Chapter 01 - Molecular Reasons
6. Which of these is not part of the scientific method?
a. Observation
b. Law
c. Theory
d. Conclusion
e. Experiment
ANSWER: d
POINTS: 1
7. Which of these is the best definition of a scientific theory?
a. A prediction based on a limited number of observations.
b. A method of explaining observations that appears contradictory.
c. A broadly applicable generalization with virtually no exceptions.
d. A method for approaching problems that is used by all scientists.
e. A tentative model that describes the underlying cause of a physical behavior.
ANSWER: e
POINTS: 1
8. Which of these is the best definition of a scientific law?
a. A prediction based on a limited number of observations.
b. A method of explaining observations that appear contradictory.
c. A broadly applicable generalization with virtually no exceptions.
d. A method for approaching problems that is used by all scientists.
e. A rule made by scientists to ensure consistency in their observations.
ANSWER: c
POINTS: 1
9. A(n) ____ is an explanation of a scientific observation.
a. law
b. theory
c. conclusion
d. prediction
e. epiphany
ANSWER: b
POINTS: 1
10. Which of these is not a requirement of a scientifically acceptable theory?
a. Good predictive power of the theory
b. Proven by additional experimentation
c. Sound reasoning for a particular observation
d. Easily revised to accommodate new observations
e. Provides model of behavior consistent with other widely accepted theories
ANSWER: b
POINTS: 1
Cengage Learning Testing, Powered by Cognero Page 2
, Chapter 01 - Molecular Reasons
11. Which of these statements about the scientific method is incorrect?
a. It is a group of absolute truths.
b. It uses experiments that are reproducible
c. It is used for testing claims about the natural world.
d. It requires one to propose a theory and perform experiments to give results which confirm or disclaim the
theory.
e. All of these are correct statements.
ANSWER: a
POINTS: 1
12. To explain natural phenomena scientists must _____.
a. have an opinion
b. make observations
c. guess correctly most of the time
d. agree with existing theories
ANSWER: b
POINTS: 1
13. Which scientist first theorized that matter was ultimately composed of small indivisible particles called atoms?
a. Dalton
b. Lavoisier
c. Empedocles
d. Plato
e. Democritus
ANSWER: e
POINTS: 1
14. The predecessor to chemistry is known as ____.
a. alchemy
b. pre-chemistry
c. biology
d. biochemistry
e. physical science
ANSWER: a
POINTS: 1
15. Which of these contributions did Alchemists of the Middle Ages make to modern science?
a. Sun centered universe and metallurgy
b. Metallurgy and development of scientific techniques
c. Scientific method and the Law of Conservation of Mass
d. Law of Conservation of Matter and The First Atomic Theory
e. Law of Conservation of Mass and the Law of Constant Composition
ANSWER: b
POINTS: 1
Cengage Learning Testing, Powered by Cognero Page 3
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