HESI A2 MODULE SECTION IV SET 1 PART 1 – SCIENCE
(2021 Revised Exam Practice Guide Contains 50 Complete Questions with Answers)
Set 1 Section IV – Science
1. Electricity is a general term encompassing a variety of phenomena resulting from thepresence
and flow of electric charge. Which of the following statements about electricityis/are true?
a. Electrically charged matter is influenced by, and produces, electromagnetic fields.
b. Electric current is a movement or flow of electrically charged particles.
c. Electric potential is a fundamental interaction between the magnetic field and the presenceand
motion of an electric charge.
d. An influence produced by an electric charge on other charges in its vicinity is an electric field.
C
Electric potential is a fundamental interaction between the magnetic field and the presence andmotion of
an electric charge. Electric potential is the capacity of an electric field to do work on an electric charge,
typically measured in volts, while electromagnetism is a fundamental interaction between the magnetic
field and the presence and motion of an electric charge
2. Which of the following is/are not included in Ohm’s Law?
a. Ohm’s Law defines the relationships between (P) power, (E) voltage, (I) current, and (R)
resistance.
b. One ohm is the resistance value through which one volt will maintain a current of one
ampere.
c. Using Ohm’s Law, voltage is determined using V = IR, with I equaling current and R equaling
resistance.
d. An ohm (Ω) is a unit of electrical voltage.
D
An ohm (Ω) is a unit of electrical voltage is not true. Note: An ohm is a unit of electrical resistance.
3. The property of a conductor that restricts its internal flow of electrons is:
a. Friction
b. Power
c. Current
d. Resistance
D
The property of a conductor that restricts its internal flow of electrons is resistance.
4. In physics, is the force that opposes the relative motion of two bodiesin
,contact.
a. Resistance
b. Abrasiveness
c. Friction
d. Antagonism
C
In physics, friction is the force that opposes the relative motion of two bodies in contact
5. What is the difference, of any, between kinetic energy and potential energy?
a. Kinetic energy is the energy of a body that results from heat while potential energy is theenergy
possessed by an object that is chilled
b. Kinetic energy is the energy of a body that results from motion while potential energy is theenergy
possessed by an object by virtue of its position or state, e.g., as in a compressed spring.
c. There is no difference between kinetic and potential energy; all energy is the same.
d. Potential energy is the energy of a body that results from motion while kinetic energy is theenergy
possessed by an object by virtue of its position or state, e.g., as in a compressed spring.
B
Kinetic energy is the energy of a body that results from motion while potential energy is theenergy
possessed by an object by virtue of its position or state, e.g., as in a compressed spring.
6. What are considered the four fundamental forces of nature?
a. Gravity, electromagnetic force, weak nuclear force, and strong nuclear force
b. Gravity, electromagnetic force, negative nuclear force, and positive nuclear force
c. Polarity, electromagnetic force, weak nuclear force, and strong nuclear force
d. Gravity, chemical magnetic force, weak nuclear force, and strong nuclear force
A
The four fundamental forces of nature are gravity, electromagnetic force, weak nuclear force,and strong
nuclear force.
7. Starting with the weakest, arrange the fundamental forces of nature in order of
strength.
a. Gravity, Weak Nuclear Force, Electromagnetic Force, Strong Nuclear Force
b. Weak Nuclear Force, Gravity, Electromagnetic Force, Strong Nuclear Force
c. Strong Nuclear Force, Weak Nuclear Force, Electromagnetic Force, Gravity
d. Gravity, Strong Nuclear Force, Weak Nuclear Force, Electromagnetic Force
A
Starting with the weakest, the fundamental forces of nature in order of strength are, Gravity,Weak
nuclear force, Electromagnetic force, Strong nuclear force.
Note: Although gravitational force is the weakest of the four, it acts over great distances.
Electromagnetic force is of order 1039 times stronger than gravity.
, 8. What is the difference between Strong Nuclear Force and Weak Nuclear Force?
a. The Strong Nuclear Force is an attractive force that binds protons and neutrons and maintains
the structure of the nucleus, and the Weak Nuclear Force is responsible for the
radioactive beta decay and other subatomic reactions.
b. The Strong Nuclear Force is responsible for the radioactive beta decay and other subatomicreactions,
and the Weak Nuclear Force is an attractive force that binds protons and neutrons and maintains the
structure of the nucleus.
c. The Weak Nuclear Force is feeble and the Strong Nuclear Force is robust.
d. The Strong Nuclear Force is a negative force that releases protons and neutrons and threatens
the structure of the nucleus, and the Weak Nuclear Force is an attractive force thatbinds protons and
neutrons and maintains the structure of the nucleus.
A
The Strong Nuclear Force is an attractive force that binds protons and neutrons and maintains the
structure of the nucleus, and the Weak Nuclear Force is responsible for the radioactive betadecay and
other subatomic reactions.
Note: The Weak Nuclear Force is so named because it is only effective for short distances. Nevertheles
it is through the Weak Nuclear Force that the sun provides us with energy by allowing one element t
change into another element
9. The Law of Conservation of Mass states that:
a. No detectable gain but, depending on the substances used, some loss can occur in chemicalreactions.
b. No detectable gain or loss occurs in chemical reactions.
c. No detectable loss but some gain occurs in chemical reactions.
d. Depending on the substances used, substantial gain or loss can occur in chemical reactions.
B
No detectable gain or loss occurs in chemical reactions.
Note: No detectable gain or loss in mass occurs in chemical reactions. However, the state of a substance
may change in a chemical reaction. For example, substances involving in a chemicalreaction can change
from solid states to gaseous states but the total mass will not change.
10. What is the difference, if any, between convection and heat radiation?
a. Thermal radiation is the transfer of heat from one place to another by the movement of fluids;
convection is electromagnetic radiation emitted from all matter due to its possessingthermal
energy.
b. Convection is the transfer of heat from one place to another by the movement of fluids;thermal
radiation is nuclear energy emitted from all matter due to its possessing thermal energy.
c. Convection is the transfer of heat from one place to another by the movement of fluids; thermal
radiation is electromagnetic radiation emitted from all matter due to its possessingthermal energy.
d. Convection is the transfer of heat from one place to another by the movement of fluids; thermal
(2021 Revised Exam Practice Guide Contains 50 Complete Questions with Answers)
Set 1 Section IV – Science
1. Electricity is a general term encompassing a variety of phenomena resulting from thepresence
and flow of electric charge. Which of the following statements about electricityis/are true?
a. Electrically charged matter is influenced by, and produces, electromagnetic fields.
b. Electric current is a movement or flow of electrically charged particles.
c. Electric potential is a fundamental interaction between the magnetic field and the presenceand
motion of an electric charge.
d. An influence produced by an electric charge on other charges in its vicinity is an electric field.
C
Electric potential is a fundamental interaction between the magnetic field and the presence andmotion of
an electric charge. Electric potential is the capacity of an electric field to do work on an electric charge,
typically measured in volts, while electromagnetism is a fundamental interaction between the magnetic
field and the presence and motion of an electric charge
2. Which of the following is/are not included in Ohm’s Law?
a. Ohm’s Law defines the relationships between (P) power, (E) voltage, (I) current, and (R)
resistance.
b. One ohm is the resistance value through which one volt will maintain a current of one
ampere.
c. Using Ohm’s Law, voltage is determined using V = IR, with I equaling current and R equaling
resistance.
d. An ohm (Ω) is a unit of electrical voltage.
D
An ohm (Ω) is a unit of electrical voltage is not true. Note: An ohm is a unit of electrical resistance.
3. The property of a conductor that restricts its internal flow of electrons is:
a. Friction
b. Power
c. Current
d. Resistance
D
The property of a conductor that restricts its internal flow of electrons is resistance.
4. In physics, is the force that opposes the relative motion of two bodiesin
,contact.
a. Resistance
b. Abrasiveness
c. Friction
d. Antagonism
C
In physics, friction is the force that opposes the relative motion of two bodies in contact
5. What is the difference, of any, between kinetic energy and potential energy?
a. Kinetic energy is the energy of a body that results from heat while potential energy is theenergy
possessed by an object that is chilled
b. Kinetic energy is the energy of a body that results from motion while potential energy is theenergy
possessed by an object by virtue of its position or state, e.g., as in a compressed spring.
c. There is no difference between kinetic and potential energy; all energy is the same.
d. Potential energy is the energy of a body that results from motion while kinetic energy is theenergy
possessed by an object by virtue of its position or state, e.g., as in a compressed spring.
B
Kinetic energy is the energy of a body that results from motion while potential energy is theenergy
possessed by an object by virtue of its position or state, e.g., as in a compressed spring.
6. What are considered the four fundamental forces of nature?
a. Gravity, electromagnetic force, weak nuclear force, and strong nuclear force
b. Gravity, electromagnetic force, negative nuclear force, and positive nuclear force
c. Polarity, electromagnetic force, weak nuclear force, and strong nuclear force
d. Gravity, chemical magnetic force, weak nuclear force, and strong nuclear force
A
The four fundamental forces of nature are gravity, electromagnetic force, weak nuclear force,and strong
nuclear force.
7. Starting with the weakest, arrange the fundamental forces of nature in order of
strength.
a. Gravity, Weak Nuclear Force, Electromagnetic Force, Strong Nuclear Force
b. Weak Nuclear Force, Gravity, Electromagnetic Force, Strong Nuclear Force
c. Strong Nuclear Force, Weak Nuclear Force, Electromagnetic Force, Gravity
d. Gravity, Strong Nuclear Force, Weak Nuclear Force, Electromagnetic Force
A
Starting with the weakest, the fundamental forces of nature in order of strength are, Gravity,Weak
nuclear force, Electromagnetic force, Strong nuclear force.
Note: Although gravitational force is the weakest of the four, it acts over great distances.
Electromagnetic force is of order 1039 times stronger than gravity.
, 8. What is the difference between Strong Nuclear Force and Weak Nuclear Force?
a. The Strong Nuclear Force is an attractive force that binds protons and neutrons and maintains
the structure of the nucleus, and the Weak Nuclear Force is responsible for the
radioactive beta decay and other subatomic reactions.
b. The Strong Nuclear Force is responsible for the radioactive beta decay and other subatomicreactions,
and the Weak Nuclear Force is an attractive force that binds protons and neutrons and maintains the
structure of the nucleus.
c. The Weak Nuclear Force is feeble and the Strong Nuclear Force is robust.
d. The Strong Nuclear Force is a negative force that releases protons and neutrons and threatens
the structure of the nucleus, and the Weak Nuclear Force is an attractive force thatbinds protons and
neutrons and maintains the structure of the nucleus.
A
The Strong Nuclear Force is an attractive force that binds protons and neutrons and maintains the
structure of the nucleus, and the Weak Nuclear Force is responsible for the radioactive betadecay and
other subatomic reactions.
Note: The Weak Nuclear Force is so named because it is only effective for short distances. Nevertheles
it is through the Weak Nuclear Force that the sun provides us with energy by allowing one element t
change into another element
9. The Law of Conservation of Mass states that:
a. No detectable gain but, depending on the substances used, some loss can occur in chemicalreactions.
b. No detectable gain or loss occurs in chemical reactions.
c. No detectable loss but some gain occurs in chemical reactions.
d. Depending on the substances used, substantial gain or loss can occur in chemical reactions.
B
No detectable gain or loss occurs in chemical reactions.
Note: No detectable gain or loss in mass occurs in chemical reactions. However, the state of a substance
may change in a chemical reaction. For example, substances involving in a chemicalreaction can change
from solid states to gaseous states but the total mass will not change.
10. What is the difference, if any, between convection and heat radiation?
a. Thermal radiation is the transfer of heat from one place to another by the movement of fluids;
convection is electromagnetic radiation emitted from all matter due to its possessingthermal
energy.
b. Convection is the transfer of heat from one place to another by the movement of fluids;thermal
radiation is nuclear energy emitted from all matter due to its possessing thermal energy.
c. Convection is the transfer of heat from one place to another by the movement of fluids; thermal
radiation is electromagnetic radiation emitted from all matter due to its possessingthermal energy.
d. Convection is the transfer of heat from one place to another by the movement of fluids; thermal
