Understanding Heat, Thermal Energy, and Temperature

Which of the following was NOT a historical theory about the nature of heat?

• Heat as a magical power

• Heat as a fundamental element

• Heat as an invisible fluid

• Heat as a type of sound wave

What is thermal energy?

• The energy transferred between two systems

• The average kinetic energy of particles in a system

• The sum of all kinetic energies of particles in a system

• The potential energy of particles in a system

If two objects have the same temperature, what can be said about their thermal energy?

• The object with more mass has more thermal energy

• Their thermal energy is equal to their potential energy

• They have the same thermal energy

• The object with less mass has more thermal energy

What does temperature measure?

• The total kinetic energy of particles

• The average kinetic energy of particles

• The energy transferred between systems

• The potential energy of particles

Which property is intrinsic: thermal energy or temperature?

• Thermal energy

• Temperature

• Both are intrinsic

• Neither is intrinsic

What happens when a hot object is placed in contact with a cold object?

• Energy flows from the hot object to the cold object

• The cold object becomes colder

• The hot object becomes hotter

• Energy flows from the cold object to the hot object

What is thermal equilibrium?

• When one system absorbs all the energy from another

• When two systems have the same temperature

• When energy stops flowing between two systems

• When two systems have the same thermal energy

In scientific terms, what is heat?

• The energy stored in a system

• The potential energy of a system

• The energy transferred between systems of different temperatures

• The total energy in a system

How is coldness perceived scientifically?

• As a loss of heat

• As a decrease in potential energy

• As an increase in thermal energy

• As a gain of kinetic energy

What is the difference between thermal energy and heat in everyday language?

• Thermal energy and heat are the same in everyday language

• Thermal energy is the energy in motion, while heat is stored energy

• Thermal energy is stored energy, while heat is the energy in motion

• Thermal energy is the energy transferred, while heat is the energy stored