2d. Thermal Energy Quick Check

Front

What is convection?

Back

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

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials, where heat energy is passed from one particle to another.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as infrared radiation from the Sun.

Front

What happens to molecules when they are heated?

Back

When molecules are heated, they gain energy, move faster, and spread apart, leading to a decrease in density.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state reached when two substances in contact have the same temperature, resulting in no net heat transfer between them.

Front

How does heat transfer occur in a candle flame?

Back

In a candle flame, heat is transferred through convection as the warm air rises and cooler air moves in to take its place.

Front

What is the role of density in convection?

Back

Density plays a crucial role in convection; warmer, less dense fluids rise while cooler, denser fluids sink, creating a circulation pattern.

Front

What is an example of conduction in everyday life?

Back

An example of conduction is when a metal spoon becomes hot after being placed in a hot soup.

Front

What is an example of radiation in everyday life?

Back

An example of radiation is feeling warmth from the Sun on your skin, even when standing in the shade.

Front

What is the significance of the distance from a heat source in heat transfer?

Back

The distance from a heat source affects the rate of heat transfer; the farther away an object is, the longer it takes to heat up.