PAX SCIENCE NLN EXAMS KEY CONCEPTS
AND TEST STRATEGIES GUIDE 2026
◉ 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
◉ 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
◉ When a sperm and egg join to form a zygote in humans, what
determines the sex of the child that is produced? Answer: The sperm
◉ When two atoms *share* a pair of electrons, the bond between
them is called: Answer: covalent
◉ When your muscles atrophy, they: Answer: waste away
AND TEST STRATEGIES GUIDE 2026
◉ 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
◉ 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
◉ When a sperm and egg join to form a zygote in humans, what
determines the sex of the child that is produced? Answer: The sperm
◉ When two atoms *share* a pair of electrons, the bond between
them is called: Answer: covalent
◉ When your muscles atrophy, they: Answer: waste away
