Amplify Thermal Energy C2 Flashcard

Front

What happens to the energy in the molecules of an object when it gets colder?

Back

The energy in the molecules decreases, causing them to move slower.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state reached when two objects in contact have the same temperature and energy is no longer transferred between them.

Front

How does heat transfer occur between two objects?

Back

Heat transfers from the hotter object to the cooler object until they reach thermal equilibrium.

Front

What is the relationship between temperature and molecular motion?

Back

As temperature increases, the motion of molecules increases; as temperature decreases, molecular motion slows down.

Front

What is conduction?

Back

Conduction is the transfer of thermal energy through direct contact between materials.

Front

What is convection?

Back

Convection is the transfer of thermal energy through the movement of fluids (liquids or gases) caused by differences in temperature.

Front

What is radiation?

Back

Radiation is the transfer of energy through electromagnetic waves, such as heat from the sun.

Front

What happens to the temperature of a hot object when it is placed in a cooler environment?

Back

The temperature of the hot object decreases as it loses heat to the cooler environment.

Front

What is the effect of surface area on heat transfer?

Back

A larger surface area increases the rate of heat transfer between objects.

Front

What is the significance of the specific heat capacity of a substance?

Back

Specific heat capacity is the amount of heat required to change the temperature of a unit mass of a substance by one degree Celsius; it determines how quickly a substance heats up or cools down.