Conduction and Convection Review

Front

What is conduction in the context of heat transfer?

Back

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

Front

What is convection and how does it differ from conduction?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density, while conduction involves direct contact.

Front

What happens to cool fluid in a convection cell?

Back

Cool fluid sinks because it is denser than the warmer fluid.

Front

What is a convection cell?

Back

A convection cell is a circular pattern of fluid movement that occurs when warmer fluid rises and cooler fluid sinks, creating a continuous flow.

Front

How does a forest fire create convection currents?

Back

A forest fire heats the air above it, causing it to rise. As the hot air rises, cooler air moves in to replace it, creating convection currents.

Front

What is the role of a conductor in heat transfer?

Back

A conductor is a material that allows heat to pass through it easily, facilitating the transfer of thermal energy.

Front

What is the effect of temperature difference on heat transfer?

Back

Heat transfer occurs from the region of higher temperature to the region of lower temperature until thermal equilibrium is reached.

Front

What is the significance of the placement of a burner in producing convection?

Back

The placement of a burner affects the direction and strength of convection currents, influencing how heat is distributed in a fluid.

Front

What is the relationship between density and fluid movement in convection?

Back

In convection, denser (cooler) fluids sink while less dense (warmer) fluids rise, creating a cycle of movement.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact reach the same temperature and no net heat transfer occurs between them.