Heat Transfer

Front

What is heat transfer?

Back

Heat transfer is the movement of thermal energy from one object or substance to another due to a temperature difference.

Front

What are the three main modes of heat transfer?

Back

The three main modes of heat transfer are conduction, convection, and radiation.

Front

Define conduction in the context of heat transfer.

Back

Conduction is the process of heat transfer through direct contact between materials, where heat moves from the hotter object to the cooler one.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density.

Front

Explain radiation as a mode of heat transfer.

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as infrared radiation, and does not require a medium to travel.

Front

How does a hot air balloon float?

Back

A hot air balloon floats because the heated air inside the balloon expands, becoming less dense than the cooler air outside, resulting in buoyancy.

Front

What is an example of conduction in everyday life?

Back

An example of conduction is a hot biscuit warming the plate it is on.

Front

What happens to an ice cube placed on a warm surface?

Back

The ice cube melts due to conduction, as heat is transferred from the warm surface to the colder ice.

Front

At what point does heat transfer stop between two objects?

Back

Heat transfer stops when both objects reach thermal equilibrium, meaning they are at the same 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.