ra: Conduction Convection Radiation

Front

What is conduction?

Back

Conduction is the transfer of thermal energy through direct contact between materials. It occurs when heat moves from a hotter object to a cooler one, such as when a metal spoon is heated in a pot of hot water.

Front

What is convection?

Back

Convection is the transfer of thermal energy through 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 energy through electromagnetic waves. It does not require a medium to travel through, allowing heat from the sun to reach Earth.

Front

What are good conductors of heat?

Back

Good conductors of heat are materials that allow thermal energy to pass through them easily. Examples include metals like copper, aluminum, and iron.

Front

What is an insulator?

Back

An insulator is a material that resists the flow of heat. It is used to reduce heat transfer, such as plastic, rubber, and wood.

Front

How does convection occur in the atmosphere?

Back

Convection in the atmosphere occurs when warm air rises and cooler air moves in to replace it, creating wind patterns and weather changes.

Front

What is the role of radiation in heating the Earth?

Back

Radiation from the sun heats the Earth's surface, which then warms the air above it, contributing to weather and climate.

Front

What is an example of conduction in everyday life?

Back

An example of conduction is when you touch a hot stove and feel the heat transfer to your hand.

Front

What is an example of convection in cooking?

Back

An example of convection in cooking is using a convection oven, where hot air circulates around the food to cook it evenly.

Front

What is an example of radiation in everyday life?

Back

An example of radiation is feeling the warmth of the sun on your skin, even on a cool day.