Thermal energy and heat transfer

Front

What is the process by which heat is transferred through electromagnetic waves?

Back

Radiation

Front

How does conduction occur between two objects?

Back

Conduction occurs when heat is transferred through direct contact between two objects, causing the molecules in the warmer object to vibrate and transfer energy to the cooler object.

Front

What happens to the density of air as it is heated?

Back

Warm air becomes less dense than cold air.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) where warmer, less dense areas rise and cooler, denser areas sink.

Front

How does thermal energy differ between hot and cold objects?

Back

Hot objects have more thermal energy than cold objects.

Front

What is the primary method of heat transfer in liquids and gases?

Back

Convection is the primary method of heat transfer in liquids and gases.

Front

What is the term for the transfer of heat through a solid material?

Back

Conduction.

Front

What is an example of radiation in everyday life?

Back

The warmth felt from the sun or a fireplace is an example of radiation.

Front

What role does density play in convection currents?

Back

Density differences in fluids cause warmer, less dense fluid to rise and cooler, denser fluid to sink, creating convection currents.

Front

What is the relationship between temperature and thermal energy?

Back

Temperature is a measure of the average kinetic energy of particles in a substance, and higher temperatures correspond to higher thermal energy.