conduction,convection,radiation flashcard

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when two objects at different temperatures touch each other.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). Warm air or liquid rises, while cooler air or liquid sinks, creating a convection current.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves. It does not require a medium, so it can occur in a vacuum, such as the heat from the Sun reaching the Earth.

Front

What is the best conductor of heat?

Back

Metals, especially copper, are the best conductors of heat and electricity.

Front

What happens to air when it is heated?

Back

When air is heated, it becomes less dense and rises, while cooler air sinks, creating a convection current.

Front

What type of heat transfer occurs when you touch a hot stove?

Back

Conduction occurs when you touch a hot stove, as heat is transferred directly from the stove to your hand.

Front

What is an example of convection in everyday life?

Back

An example of convection is boiling water, where hot water rises to the top and cooler water sinks to the bottom.

Front

How does radiation heat the Earth?

Back

Radiation from the Sun travels through space and warms the Earth when it reaches the surface.

Front

What is a convection current?

Back

A convection current is a continuous cycle of rising warm fluid and sinking cool fluid, often seen in liquids and gases.

Front

What is the role of particles in conduction?

Back

In conduction, particles collide with each other, transferring energy from the hotter object to the cooler one.