Heat Flashcard 21-22

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when heat moves from a hotter object to a cooler one without the movement of the material itself.

Front

What is convection?

Back

Convection is the transfer of heat by the movement of fluids (liquids or gases). It occurs when warmer, less dense fluid rises and 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 transferred through empty space.

Front

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

Example of convection in everyday life?

Back

Warm air rising over a beach while cooler air from the ocean moves in is an example of convection.

Front

Why does an ice cube melt in hot liquid?

Back

Heat from the liquid transfers to the ice, causing it to melt.

Front

What happens to air when it is heated?

Back

When air is heated, it becomes less dense and rises, creating convection currents.

Front

What is the role of density in convection?

Back

Density differences in fluids cause warmer, less dense fluid to rise and cooler, denser fluid to sink, driving convection.

Front

How does a toaster use convection?

Back

A toaster uses convection to circulate hot air around the bread, toasting it evenly.

Front

What is an example of radiation?

Back

The heat from the sun reaching the Earth is an example of radiation.