CHEMISTRY 101 MIDTERM IVY TECH 1 -4

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CHEMISTRY 101 MIDTERM IVY TECH (1 -4)

EXAM QUESTIONS AND ANSWERS .

Which of the following would be considered a theory?

• glass is fragile
• hot air rises
• gasoline has a very strong odor.
• helium balloons float because helium is less dense than air.
• none of the above - correct answer - D

Which statement accurately describes the purpose of experiments?

• experiments are designed to produce the results predicted by a

theory.

• experiments can be replaced by a simple, logical reasoning of

known facts.

• experiments are designed to produce unexplainable results for

further investigation.

• experiments look for other observable predictions of a theory.
• none of the above. - correct answer - D
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What term best describes a brief statement that summarizes many past observations and predicts new ones?

• experiment
• hypothesis
• scientific law
• theory
• none of the above - correct answer - C

Which statement would NOT be an example of "quantification"?

• The newest model of that car gets five more miles per gallon

than last year's model.

• The price of milk went up ten cents per gallon.
• The average high temperature this July was two degrees higher

than last year's average high temperature.

• The water in the swimming pool feels colder than it was

yesterday.

• None of the above. - correct answer - D

Who discovered the law of conservation of mass? 2 / 4

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• John Dalton
• Antoine Lavoisier
• Nivaldo Tro
• John Dalton and Antoine Lavoisier
• None of the above - correct answer - B

What is the definition of a scientific theory?

• A brief statement that summarizes past observations and

predicts future ones.

• A model that explains the underlying reasons for observations

and laws.

• The equivalent of a scientific opinion which others may

disagree with.

• A method of learning that emphasizes reason as the way to

understand the world.

• None of the above. - correct answer - B

Which of the statements below is NOT part of the scientific method?

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• Observation and measurement
• Formation of a hypothesis
• Testing of a hypothesis by experimentation
• Refinement of a hypothesis as needed
• All of the above steps are part of the scientific method. - correct

answer - E

Which statement about the scientific method is TRUE?

• The scientific method emphasizes reason as the way to

understand the world.

• The scientific method emphasizes observation and reason as

the way to understand the world.

• The scientific method emphasizes observation and

experimentation as the way to understand the world.

• The scientific method emphasizes scientific laws as the way to

understand the world.

• All of the above statements are false. - correct answer - C

Who discovered the atomic theory?

• John Dalton
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