Convection, Conduction, Radiation

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). It occurs when warmer areas of a liquid or gas rise and cooler areas sink, creating a circulation pattern.

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 through molecular collisions.

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

How does a hot air balloon rise?

Back

A hot air balloon rises due to convection. The air inside the balloon is heated, causing it to become less dense than the cooler air outside, resulting in an upward lift.

Front

What is the primary source of energy for the Earth?

Back

The primary source of energy for the Earth is radiation from the sun, which heats the surface and drives weather and climate.

Front

What happens when an egg is placed on hot pavement?

Back

The pavement conducts heat to the egg, cooking it due to the high temperature of the pavement.

Front

What is an example of radiation in everyday life?

Back

An example of radiation is when a car's inside temperature rises on a sunny day due to sunlight entering through the windows.

Front

What is the difference between conduction and convection?

Back

Conduction is heat transfer through direct contact, while convection is heat transfer through the movement of fluids.

Front

Can radiation occur in a vacuum?

Back

Yes, radiation can occur in a vacuum because it does not require a medium to transfer heat.

Front

What is an example of convection in nature?

Back

An example of convection in nature is the rising of warm air and sinking of cool air, which creates wind patterns.