NLN Pax Science Practice Tests
Complete Solution –Verified 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 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: ~CORRECT 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? ~CORRECT ANSWER~✓✓the approximate
focal length of the lens
In ecological succession, the first living thing to colonize a hitherto
barren area is called a: ~CORRECT ANSWER~✓✓pioneer organism
Unicellular organisms that have a nucleus and can swim with the aid of
cilia are examples of: ~CORRECT ANSWER~✓✓protozoans
Which of these conditions is associated with smoking? ~CORRECT
ANSWER~✓✓emphysema
,Which of these quantities is most closely associated with an object's
inertia? ~CORRECT ANSWER~✓✓Mass
Which of these sequences of anatomic organization, from the simplest
level to the most complex, is the correct sequence? ~CORRECT
ANSWER~✓✓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 ANSWER~✓✓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 ANSWER~✓✓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 ANSWER~✓✓Diffusion
You cut your finger rather deeply while slicing an apple. Which of these
actions should you take first? ~CORRECT ANSWER~✓✓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
ANSWER~✓✓variation within a species
A *tincture* is a solution in which: ~CORRECT ANSWER~✓✓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 ANSWER~✓✓active transport
If the night temperature drops 50 degrees, the roadrunner's internal
energy-conservation permits a lowering of body temperature to:
~CORRECT ANSWER~✓✓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
ANSWER~✓✓specific heat
A woman suddenly chokes on a piece of food and clutches frantically at
her throat. An immediate remedy is to: ~CORRECT
ANSWER~✓✓apply quick, hard pressures successively to her abdomen,
just below her diaphragm
Complete Solution –Verified 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 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: ~CORRECT 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? ~CORRECT ANSWER~✓✓the approximate
focal length of the lens
In ecological succession, the first living thing to colonize a hitherto
barren area is called a: ~CORRECT ANSWER~✓✓pioneer organism
Unicellular organisms that have a nucleus and can swim with the aid of
cilia are examples of: ~CORRECT ANSWER~✓✓protozoans
Which of these conditions is associated with smoking? ~CORRECT
ANSWER~✓✓emphysema
,Which of these quantities is most closely associated with an object's
inertia? ~CORRECT ANSWER~✓✓Mass
Which of these sequences of anatomic organization, from the simplest
level to the most complex, is the correct sequence? ~CORRECT
ANSWER~✓✓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 ANSWER~✓✓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 ANSWER~✓✓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 ANSWER~✓✓Diffusion
You cut your finger rather deeply while slicing an apple. Which of these
actions should you take first? ~CORRECT ANSWER~✓✓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
ANSWER~✓✓variation within a species
A *tincture* is a solution in which: ~CORRECT ANSWER~✓✓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 ANSWER~✓✓active transport
If the night temperature drops 50 degrees, the roadrunner's internal
energy-conservation permits a lowering of body temperature to:
~CORRECT ANSWER~✓✓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
ANSWER~✓✓specific heat
A woman suddenly chokes on a piece of food and clutches frantically at
her throat. An immediate remedy is to: ~CORRECT
ANSWER~✓✓apply quick, hard pressures successively to her abdomen,
just below her diaphragm
