3. A cylinder and an airtight piston are used in the following experiment. The piston is pushed up and down in the cylin

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3. A cylinder and an airtight piston are used in the
following experiment. The piston is pushed up and down in the
cylinder and the resulting pressure of the air inside the cylinder
is measured with a pressure gauge. The results of the experiment
are recorded in the following table: Volume of Air (L) Pressure
Reading (Atm) 8 1 4 2 2 4 1 8 A hypothesis concerning the apparatus
is stated as follows: “When the volume of the cylinder is
decreased, the pressure is increased.” Which of the following
statements is true?
A. The hypothesis is supported by the experimental data.
B. The hypothesis is refuted by the experimental data.
C. The hypothesis is not addressed by the experiment.
D. There is not enough information to make a judgment about the
hypothesis.
15. An experienced mountaineer decides to climb Mount
Everest using the same route in the same season and with similar
materials and equipment used by a fatal 1924 expedition. The
scientific purpose of such a climb would be to
A. show that modern technology makes climbing safer.
B. identify routes that may be explored in future climbs.
C. assess why the earlier expedition may have failed.
D. examine changes in regional climate patterns.
17. The purpose of surfactants in the lungs is
to
A. facilitate lung expansion.
B. bind oxygen from the air.
C. improve lung blood flow.
D. remove pollutants in the air.

18. Which of the following terms describes changes in
allele frequencies in the gene pool over a single
generation?
A. Macroevolution
B. Microevolution
C. Segregation
D. Speciation

19. NaOH + HS0-+ Hp + NaS0 24 24 Which of the following is
the number of moles of NaOH required to neutralize 1 mole of H2S04
in the equation above? (Note: The reaction is not
balanced.)
A. 0.5 moles
B. 1 mole
C. 1.5 moles
D. 2 moles