Heat and Temperature Quiz

Heat is the kinetic energy in particles of matter. The energy of their movement and vibration.

Temperature is a measurement of the average kinetic energy of particles in a system. It tells us how hot or cold something is.

Heat transfer occurs when there is a difference in temperature between two areas. Heat always flows from the hotter region to the colder region.

Conduction transfers heat through direct contact between particles. Think of heat traveling like a chain reaction.

Convection transfers heat through the movement of fluids. It works by warmer, less dense fluids rising and cooler, denser fluids sinking.

The total energy or heat in any isolated system or system of particles will remain constant. Heat can be transformed into another kind of energy or escape a system, but it cannot be destroyed.

Heat cannot spontaneously transfer from a colder system to a hotter system. When interacting, systems reach a mutual thermal equilibrium.

As a system approaches thermal equilibrium (entropy approaches a constant value), the system's temperature approaches absolute zero.

The amount of thermal energy per unit mass required to increase the temperature of a system by one degree Celsius.

Thermal energy absorbed or released during a phase change (solid to liquid, liquid to gas) at constant temperature.

The expansion of matter due to an increase in temperature. Particles gain kinetic energy and push further apart.

Thermal equilibrium is reached when the kinetic energy in the particles becomes spatially uniform, or evenly spread out.

The state of a system at thermal equilibrium where entropy is at its highest.

A theoretical concept where heat or energy cannot escape a system.

The difference between a non-equilibrium state and the state of a system close to absolute zero where particles are locked in place and motionless.