Heat and heat Transfer 2

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when heat is transferred from a hotter object to a cooler one through molecular collisions.

Front

What is convection?

Back

Convection is the transfer of heat in fluids (liquids and gases) through the movement of the fluid itself. Warmer, less dense fluid rises while cooler, denser fluid sinks, creating a circulation pattern.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves. It does not require a medium to travel through, allowing heat to be felt from a distance, such as from the sun or a fire.

Front

Example of conduction in everyday life?

Back

Cooking a pancake on a griddle is an example of conduction, where heat is transferred directly from the griddle to the pancake.

Front

Example of convection in everyday life?

Back

Boiling water is an example of convection, where hot water rises to the surface and cooler water sinks, creating a circular motion.

Front

Example of radiation in everyday life?

Back

Feeling warmth from the sun or a campfire is an example of radiation, where heat is transferred through electromagnetic waves.

Front

What happens to thermal energy in larger objects?

Back

Larger objects, like a large cup of cocoa, have more thermal energy than smaller objects at the same temperature because thermal energy depends on both temperature and mass.

Front

How does temperature relate to thermal energy?

Back

Temperature is a measure of the average kinetic energy of particles in a substance, while thermal energy is the total energy of all the particles in that substance.

Front

What is the role of a conductor?

Back

A conductor is a material that allows heat to pass through it easily, such as metals like copper and aluminum.

Front

What is an insulator?

Back

An insulator is a material that resists the flow of heat, such as wood, plastic, or rubber.