NLN Pax Science practice tests (correct answers)
A person blows his breath into a straw that is placed in limewater. The limewater
becomes cloudy because the person's breath contains: correct answers 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: correct answers 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? correct
answers the approximate focal length of the lens
In ecological succession, the first living thing to colonize a hitherto barren area is called
a: correct answers pioneer organism
Unicellular organisms that have a nucleus and can swim with the aid of cilia are
examples of: correct answers protozoans
Which of these conditions is associated with smoking? correct answers emphysema
Which of these quantities is most closely associated with an object's inertia? correct
answers Mass
Which of these sequences of anatomic organization, from the simplest level to the most
complex, is the correct sequence? correct answers From tissue, organ, organ system to
organism
Which part of the cell structure controls the passage of materials into and out of the
cell? correct answers Plasma membrane
While working in the chemistry laboratory, a student spills dilute hydrochloric acid on her
hand. What is the first action this student should take? correct answers Flush her hand
with large quantities of water
Within a living cell, the oxygen (O2) from a mixture of O2 and carbon dioxide (CO2) is
used up. This creates a concentration gradient across the cell membrane, drawing O2
across the membrane from the outside in, a process known as correct answers
Diffusion
You cut your finger rather deeply while slicing an apple. Which of these actions should
you take first? correct answers Wash the wound continuously with cold running water
30 students in a class carefully measure the length and width of 20 peanut shells. They
also count the number and note the size of the peanuts inside. This information is
recorded on various graphs showing the numbers of nuts and the different sizes. The
, collected evidence of the peanuts gives the students an idea of the extent of: correct
answers variation within a species
A *tincture* is a solution in which: correct answers alcohol is the solvent
All the glucose filtered from the blood in the glomerulus into the Bowman's capsule of
the kidney nephron is returned to the tissue fluid while passing along the proximal
tubule. This rapid return is effected by the process of: correct answers active transport
If the night temperature drops 50 degrees, the roadrunner's internal energy-
conservation permits a lowering of body temperature to: correct answers 94°F
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 correct answers specific heat
A woman suddenly chokes on a piece of food and clutches frantically at her throat. An
immediate remedy is to: correct answers 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: correct answers carbon dioxide
Night blindness in humans is caused by a lack of: correct answers Vitamin A
In varieties of matter, the term heterogeneous may be applied to: correct answers
mixtures, but not elements or compounds
The atoms of an element with seven valence electrons are most probably classified as:
correct answers nonmetals
The inherited factors that are transmitted in a organism from generation to generation
are called its: correct answers genotype
Which of these conditions is associated with smoking? correct answers Emphysema
Within which of these structures of the female reproductive tract is the human egg
fertilized? correct answers Fallopian tube
A cell which manufactures a large amount of protein for export would have an
abundance of organelles called: correct answers ribosomes
A lens that focuses distant light to a single point is known as a : correct answers
converging (convex) lens
A person blows his breath into a straw that is placed in limewater. The limewater
becomes cloudy because the person's breath contains: correct answers 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: correct answers 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? correct
answers the approximate focal length of the lens
In ecological succession, the first living thing to colonize a hitherto barren area is called
a: correct answers pioneer organism
Unicellular organisms that have a nucleus and can swim with the aid of cilia are
examples of: correct answers protozoans
Which of these conditions is associated with smoking? correct answers emphysema
Which of these quantities is most closely associated with an object's inertia? correct
answers Mass
Which of these sequences of anatomic organization, from the simplest level to the most
complex, is the correct sequence? correct answers From tissue, organ, organ system to
organism
Which part of the cell structure controls the passage of materials into and out of the
cell? correct answers Plasma membrane
While working in the chemistry laboratory, a student spills dilute hydrochloric acid on her
hand. What is the first action this student should take? correct answers Flush her hand
with large quantities of water
Within a living cell, the oxygen (O2) from a mixture of O2 and carbon dioxide (CO2) is
used up. This creates a concentration gradient across the cell membrane, drawing O2
across the membrane from the outside in, a process known as correct answers
Diffusion
You cut your finger rather deeply while slicing an apple. Which of these actions should
you take first? correct answers Wash the wound continuously with cold running water
30 students in a class carefully measure the length and width of 20 peanut shells. They
also count the number and note the size of the peanuts inside. This information is
recorded on various graphs showing the numbers of nuts and the different sizes. The
, collected evidence of the peanuts gives the students an idea of the extent of: correct
answers variation within a species
A *tincture* is a solution in which: correct answers alcohol is the solvent
All the glucose filtered from the blood in the glomerulus into the Bowman's capsule of
the kidney nephron is returned to the tissue fluid while passing along the proximal
tubule. This rapid return is effected by the process of: correct answers active transport
If the night temperature drops 50 degrees, the roadrunner's internal energy-
conservation permits a lowering of body temperature to: correct answers 94°F
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 correct answers specific heat
A woman suddenly chokes on a piece of food and clutches frantically at her throat. An
immediate remedy is to: correct answers 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: correct answers carbon dioxide
Night blindness in humans is caused by a lack of: correct answers Vitamin A
In varieties of matter, the term heterogeneous may be applied to: correct answers
mixtures, but not elements or compounds
The atoms of an element with seven valence electrons are most probably classified as:
correct answers nonmetals
The inherited factors that are transmitted in a organism from generation to generation
are called its: correct answers genotype
Which of these conditions is associated with smoking? correct answers Emphysema
Within which of these structures of the female reproductive tract is the human egg
fertilized? correct answers Fallopian tube
A cell which manufactures a large amount of protein for export would have an
abundance of organelles called: correct answers ribosomes
A lens that focuses distant light to a single point is known as a : correct answers
converging (convex) lens
