The Primordial Soup Theory Discussion Solutions

The Primordial Soup Theory Discussion Solutions
131. According to the primordial soup theory, which of the following gases is
not believed to have been a major component of the primitive
atmosphere?
(A) Methane
(B) Hydrogen
(C) Water vapor
(D) Helium
The Primordial Soup Theory Discussion Solutions
132. The greatest limitation in the design of the Miller-Urey experiment is the:
(A) use of a condenser to cool water vapor.
(B) production of a variety of organic compounds.
(C) presence of continuous electrical sparks.
(D) recycling of water throughout the apparatus.
133. The hydrothermal vents theory states that organic molecules originally formed:
(A) inside the earth.
(B) in the earth’s atmosphere.
(C) in the deep ocean.
(D) within volcanoes.
62 › McGraw Hill 500 ACT Science Questions
The Primordial Soup Theory Discussion Solutions
The Primordial Soup Theory Discussion Solutions
Test 4 ‹ 63
134. Scientists consider the outcome of the Miller-Urey experiment to be
evidence:
(A) that refutes the primordial soup theory.
(B) in support of the primordial soup theory.
(C) that refutes both the primordial soup and the hydrothermal vents
theories.
(D) in support of the hydrothermal vents theory.
135. According to the passage, temperature gradients exist in the deep ocean
due to the:
(A) constant release of hot gases into cold water.
(B) decreased availability of sunlight at greater depths.
(C) existence of ecosystems made up of diverse organisms.
(D) reactions that produce organic molecules.
136. Which of the following is a key assumption of the primordial soup theory?
(A) Sunlight provided the energy needed to convert inorganic
compounds to organic compounds.
(B) The composition of the primitive atmosphere was different from that
of the current atmosphere.
(C) Amino acids can be produced from inorganic compounds in the
laboratory.
(D) Organic compounds can only be produced by the reaction of other
organic compounds.
137. A compound’s normal boiling point is the:
(A) minimum temperature at which the compound boils.
(B) average temperature at which the compound boils across all possible
atmospheric pressures.
(C) maximum temperature at which the compound boils.
(D) temperature at which the compound boils under standard
atmospheric pressure.
138. According to Figure 4.3, an organic compound will boil at a lower
temperature if:
The Primordial Soup Theory Discussion Solutions
(A) vapor pressure increases.
(B) atmospheric pressure decreases.
(C) atmospheric and vapor pressures become unequal.
(D) vapor pressure is greater than atmospheric pressure.
139. At a vapor pressure of 50 mmHg, which alkane in Figure 4.3 would boil
closest to 0°C?
(A) Heptane
(B) Hexane
(C) Pentane
(D) Octane
140. According to Figure 4.3, what vapor pressure will cause pentane’s boiling
point to be closest to 40°C?
(A) 760 mmHg
(B) 600 mmHg
(C) 400 mmHg
(D) 850 mmHg
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