What is the SI unit of temperature?
a) Celsius
b) Kelvin
c) Fahrenheit
d) Joule
Which of the following is a measure of the average kinetic energy of particles in a substance?
a) Temperature
b) Heat
c) Pressure
d) Volume
The process of heat transfer that occurs without the movement of particles is called:
a) Conduction
b) Convection
c) Radiation
d) Diffusion
What does the second law of thermodynamics state about heat flow?
a) Heat always flows from hot to cold bodies
b) Heat can flow from cold to hot bodies without external work
c) Heat flows only in solids
d) Heat flows from cold to hot without work in a closed system
Which of the following is a form of heat transfer in which energy is transferred through a medium due to particle movement?
a) Conduction
b) Convection
c) Radiation
d) All of the above
Which material has the highest thermal conductivity?
a) Copper
b) Air
c) Rubber
d) Glass
The specific heat capacity of a material is:
a) The amount of energy needed to change the material’s temperature
b) The energy required to increase the material’s temperature by 1°C
c) The energy released when the material cools
d) Both a and b
Which of the following temperature scales has absolute zero as 0 K?
a) Celsius
b) Fahrenheit
c) Kelvin
d) Rankine
Heat is transferred by conduction when:
a) There is a difference in temperature between two objects
b) The objects are in contact with each other
c) Heat flows due to electromagnetic waves
d) Both a and b
What is the amount of heat required to raise the temperature of 1 gram of water by 1°C called?
a) Specific heat capacity
b) Latent heat
c) Calorie
d) Joule
Which of the following best describes heat?
a) The total energy of motion in a substance
b) The flow of energy from one substance to another
c) The ability to do work
d) The total kinetic energy of particles in a substance
Which of the following processes involves the transfer of heat via electromagnetic waves?
a) Conduction
b) Convection
c) Radiation
d) Advection
The latent heat of fusion is the heat required to:
a) Change a substance from solid to liquid
b) Change a substance from liquid to gas
c) Change a substance from gas to solid
d) Change a substance from gas to liquid
Which of the following is a characteristic of heat flow by conduction?
a) It occurs in gases only
b) It involves particle motion in the medium
c) It requires a medium for energy transfer
d) It happens only in liquids
In which situation does heat transfer occur due to the expansion of heated air?
a) Convection
b) Radiation
c) Conduction
d) None of the above
The total amount of thermal energy in a substance depends on all of the following except:
a) The substance’s temperature
b) The substance’s mass
c) The substance’s specific heat capacity
d) The substance’s color
The temperature at which a substance has no kinetic energy and no heat energy is known as:
a) Absolute zero
b) Freezing point
c) Boiling point
d) Melting point
Which of the following materials is most commonly used as an insulator?
a) Copper
b) Aluminum
c) Wool
d) Iron
What happens to the temperature of a substance when it absorbs heat but undergoes no change in phase?
a) It remains constant
b) It increases
c) It decreases
d) It fluctuates
Which of the following describes the transfer of heat from the Sun to the Earth?
a) Conduction
b) Convection
c) Radiation
d) Advection
What does the first law of thermodynamics state?
a) Energy cannot be created or destroyed
b) Energy can only be transferred through radiation
c) Energy flows from cold to hot objects
d) Heat will never flow from hot to cold objects
In which of the following does heat transfer occur by the movement of molecules in a gas or liquid?
a) Conduction
b) Convection
c) Radiation
d) None of the above
What is the primary cause of heat transfer through conduction?
a) Particle motion in the medium
b) Movement of electrons
c) Movement of protons
d) Energy transfer via electromagnetic waves
The specific heat of a material is the amount of heat required to:
a) Change the temperature of 1 gram of the material by 1°C
b) Change the temperature of 1 kilogram of the material by 1°C
c) Change the volume of the material
d) Change the phase of the material
What happens when a material’s temperature is raised beyond its melting point?
a) It freezes
b) It boils
c) It expands
d) It undergoes a phase change
Which of the following is the unit of heat in the SI system?
a) Joule
b) Watt
c) Kelvin
d) Calorie
What is the term used for heat transfer without the movement of particles?
a) Conduction
b) Convection
c) Radiation
d) Diffusion
In which of the following cases does heat transfer occur by conduction?
a) A metal rod is heated at one end
b) The air around a stove is heated
c) Heat from the Sun warms the Earth
d) Heat from a fire rises
Which of the following is the latent heat of vaporization?
a) Heat required to convert a solid into a liquid
b) Heat required to change a gas into a liquid
c) Heat required to change a liquid into a gas
d) Heat required to change a solid into a gas
