NLN Pax Science Practice Tests/ 161 Quizzes
with Certified Solutions.
A person blows his breath into a straw that is placed in limewater. The limewater becomes
cloudy because the person's breath contains: - ANSWER: carbon dioxide
A person who was in an auto accident has formed a blood clot at the site of the injury. One
event that can lead to formation of a blood clot is that: - ANSWER: ruptured platelets release
thromboplastin
A student focuses sunlight to a point with a thin converging (convex) lens. Which of these direct
measurements can the student make as a result of this experiment? - ANSWER: the
approximate focal length of the lens
1 kilogram (kg) of solid X at 10C and 1 kg of solid Y 10C each absorb 5 joules of heat energy. The
final temperatures on X and Y is 15C and 20C, respectively. Compared to X, Y must have a
lower:F - ANSWER: specific heat
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,A woman suddenly chokes on a piece of food and clutches frantically at her throat. An
immediate remedy is to: - ANSWER: apply quick, hard pressures successively to her abdomen,
just below her diaphragm
An unknown gas is more dense than air, does not support combustion, and turns a limewater
solution cloudy. This gas is most probably: - ANSWER: carbon dioxide
Night blindness in humans is caused by a lack of: - ANSWER: Vitamin A
In varieties of matter, the term heterogeneous may be applied to: - ANSWER: mixtures, but not
elements or compounds
The atoms of an element with seven valence electrons are most probably classified as: -
ANSWER: nonmetals
The inherited factors that are transmitted in a organism from generation to generation are
called its: - ANSWER: genotype
Which of these conditions is associated with smoking? - ANSWER: Emphysema
Within which of these structures of the female reproductive tract is the human egg fertilized? -
ANSWER: Fallopian tube
A cell which manufactures a large amount of protein for export would have an abundance of
organelles called: - ANSWER: ribosomes
A lens that focuses distant light to a single point is known as a : - ANSWER: converging (convex)
lens
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, A substance composed of similar atoms (number of protons is the same for all) that can not be
broken down chemically is a(n) - ANSWER: element
Charles Darwin's theory of evolution suggests that the reason for the various differences
between species is a result of: - ANSWER: natural selection
How much current is drawn by a light bulb that has a resistance of 100 R with a voltage of 110
V? (V= IR) - ANSWER: 1.1 amperes
The amplitude of a sound wave is most closely related to its: - ANSWER: loudness
The calorie and the kilocalorie are units of : - ANSWER: energy
The force of gravity on an object is that object's: - ANSWER: weight
The Law of Dominance was proposed by which of the following scientists? - ANSWER: Mendel
The number of complete waves which pass a point in one second is known as a : - ANSWER:
frequency
The vertical columns on the periodic chart are known as: - ANSWER: groups
In ecological succession, the first living thing to colonize a hitherto barren area is called a: -
ANSWER: pioneer organism
Unicellular organisms that have a nucleus and can swim with the aid of cilia are examples of: -
ANSWER: protozoans
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with Certified Solutions.
A person blows his breath into a straw that is placed in limewater. The limewater becomes
cloudy because the person's breath contains: - ANSWER: carbon dioxide
A person who was in an auto accident has formed a blood clot at the site of the injury. One
event that can lead to formation of a blood clot is that: - ANSWER: ruptured platelets release
thromboplastin
A student focuses sunlight to a point with a thin converging (convex) lens. Which of these direct
measurements can the student make as a result of this experiment? - ANSWER: the
approximate focal length of the lens
1 kilogram (kg) of solid X at 10C and 1 kg of solid Y 10C each absorb 5 joules of heat energy. The
final temperatures on X and Y is 15C and 20C, respectively. Compared to X, Y must have a
lower:F - ANSWER: specific heat
Page 1 of 18
,A woman suddenly chokes on a piece of food and clutches frantically at her throat. An
immediate remedy is to: - ANSWER: apply quick, hard pressures successively to her abdomen,
just below her diaphragm
An unknown gas is more dense than air, does not support combustion, and turns a limewater
solution cloudy. This gas is most probably: - ANSWER: carbon dioxide
Night blindness in humans is caused by a lack of: - ANSWER: Vitamin A
In varieties of matter, the term heterogeneous may be applied to: - ANSWER: mixtures, but not
elements or compounds
The atoms of an element with seven valence electrons are most probably classified as: -
ANSWER: nonmetals
The inherited factors that are transmitted in a organism from generation to generation are
called its: - ANSWER: genotype
Which of these conditions is associated with smoking? - ANSWER: Emphysema
Within which of these structures of the female reproductive tract is the human egg fertilized? -
ANSWER: Fallopian tube
A cell which manufactures a large amount of protein for export would have an abundance of
organelles called: - ANSWER: ribosomes
A lens that focuses distant light to a single point is known as a : - ANSWER: converging (convex)
lens
Page 2 of 18
, A substance composed of similar atoms (number of protons is the same for all) that can not be
broken down chemically is a(n) - ANSWER: element
Charles Darwin's theory of evolution suggests that the reason for the various differences
between species is a result of: - ANSWER: natural selection
How much current is drawn by a light bulb that has a resistance of 100 R with a voltage of 110
V? (V= IR) - ANSWER: 1.1 amperes
The amplitude of a sound wave is most closely related to its: - ANSWER: loudness
The calorie and the kilocalorie are units of : - ANSWER: energy
The force of gravity on an object is that object's: - ANSWER: weight
The Law of Dominance was proposed by which of the following scientists? - ANSWER: Mendel
The number of complete waves which pass a point in one second is known as a : - ANSWER:
frequency
The vertical columns on the periodic chart are known as: - ANSWER: groups
In ecological succession, the first living thing to colonize a hitherto barren area is called a: -
ANSWER: pioneer organism
Unicellular organisms that have a nucleus and can swim with the aid of cilia are examples of: -
ANSWER: protozoans
Page 3 of 18
