PAX SCIENCE NLN EXAMS COLLECTION
(ANSWERED) QUESTIONS AND 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
(ANSWERED) QUESTIONS AND 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
