Thermal Energy Transfer Review

Front

What is conduction?

Back

Conduction is the transfer of thermal energy through direct contact between materials. It occurs when heat moves from a hotter object to a cooler one.

Front

What is convection?

Back

Convection is the transfer of thermal energy through the movement of fluids (liquids or gases). Warmer, less dense fluid rises while cooler, denser fluid sinks, creating a circulation pattern.

Front

What is radiation?

Back

Radiation is the transfer of thermal energy through electromagnetic waves. It does not require a medium and can occur in a vacuum, such as heat from the sun.

Front

How does temperature relate to molecular motion?

Back

Temperature measures the average kinetic energy of molecules. Higher temperatures mean molecules move faster, while lower temperatures mean they move slower.

Front

What is the difference between heat and temperature?

Back

Temperature measures the motion of molecules, and heat is the energy transferred due to that motion.

Front

Give an example of conduction in everyday life.

Back

Ironing a shirt is an example of conduction, where heat is transferred from the iron to the fabric.

Front

Give an example of convection in everyday life.

Back

An attic feeling warmer than the basement is an example of convection, where warm air rises and cool air sinks.

Front

Give an example of radiation in everyday life.

Back

Feeling the warmth of the sun on your skin is an example of radiation, where heat is transferred through electromagnetic waves.

Front

What happens to molecules when they are heated?

Back

When molecules are heated, they gain energy and move faster, leading to increased temperature.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact with each other reach the same temperature, resulting in no net heat transfer.